Java GUI Help Needed
Can someone help me find a link, book, tutorial or anything along those lines that can help me understand building a GUI in Java? Thanks, Jeremy
When I was about to create my first GUI I used an IDE with "visual" capabilities. You design the GUI by using drag-and-drop and filling in tables, and then the IDE generates the code automatically for you. I found this helpful because Swing is so complex and in this way you get your options presented to you and you can study the generated code.
Similar Messages
-
*////The declaration*
Entry [] entries - array of entries
Int eno - number of Entrys in entries
Int MAXE = 100; maximum number of entrys in entries
Int current ? index in entries of entry *///////I have few Jtextfields in a GUI where when I click ?new? Jbutton it would put the Jtextfields in entries[eno] can I know how to write this code .*
Public void actionPerformed (ActionEvent E) {
If (e.getSource==new) ;
Sorry not sure how to write plz help
}What is an Entry? What is an Int?
I have few Jtextfields in a GUI where when I click ?new? Jbutton it would put the Jtextfields in entries[eno] can I know how to write this code .If you want to put the JTextFields in entries[], then entries has to be of type JTextField[]. Or do you want to put the strings that were entered into the JTextFields into entries[]?
Here is my attempt:
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
class MyWindow extends JFrame implements ActionListener
private ArrayList<JTextField> textBoxes;
private ArrayList<String> entries;
public MyWindow()
//Initialize frame:
super("Testing");
setBounds(20, 100, 500, 500);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
textBoxes = new ArrayList<JTextField>();
entries = new ArrayList<String>();
//Create textboxes:
textBoxes.add(new JTextField("", 20));
textBoxes.add(new JTextField("", 30));
//Create button:
JButton newButton = new JButton("new");
newButton.addActionListener(this);
//'this'-->look in this class for actionPerformed() method
//Create panel:
JPanel panel = new JPanel();
for(JTextField textBox: textBoxes)
panel.add(textBox);
panel.add(newButton);
//Add panel to window:
Container cpane = getContentPane();
cpane.add(panel);
public void actionPerformed(ActionEvent ev)
for(JTextField textBox: textBoxes)
entries.add(textBox.getText());
for(String str: entries)
System.out.println(str);
public class WindowTest
public static void createAndShowGui()
MyWindow win = new MyWindow();
win.setVisible(true);
public static void main(String args[])
//The proper way to launch a java gui:
Runnable runner = new Runnable()
public void run()
createAndShowGui();
SwingUtilities.invokeLater(runner);
}Or maybe you don't know how many JTextFields there are in the window? Is the user adding them dynamically?
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
class MyWindow extends JFrame implements ActionListener
private ArrayList<JTextField> entries;
JPanel panel;
public MyWindow()
//Initialize frame:
super("Testing");
setBounds(20, 100, 500, 500);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
entries = new ArrayList<JTextField>();
//Create textboxes:
//Create button:
JButton newButton = new JButton("new");
newButton.addActionListener(this);
//'this'-->look in this class for actionPerformed() method
//Create panel:
panel = new JPanel();
panel.add(new JTextField("", 20));
panel.add(new JTextField("", 20));
panel.add(newButton);
//Add panel to window:
Container cpane = getContentPane();
cpane.add(panel);
public void actionPerformed(ActionEvent ev)
int count = panel.getComponentCount();
System.out.println(count);
Component comp = null;
for(int i=0; i<count; ++i)
comp = panel.getComponent(i);
if(comp.getClass() == JTextField.class)
entries.add((JTextField)comp);
for(JTextField tf: entries)
System.out.println(tf.getText());
public class WindowTest
public static void createAndShowGui()
MyWindow win = new MyWindow();
win.setVisible(true);
public static void main(String args[])
Runnable runner = new Runnable()
public void run()
createAndShowGui();
SwingUtilities.invokeLater(runner);
} -
Hi,
I am trying to develop a Java Event Calendar which is able to display the calendar weekly. So the JPanel will be setup with 7 JLists for the days of the week. Buttons will allow switching of the days of the week, months and year.
Each JList corresponding to the day of the week will have its data obtained from the database using JDBC and loaded upon 're-drawing' of the lists.
However i am having trouble with the GUI side in understanding how to implement this, i am confident with the JList and database side of things, i have just used a similar example using the Calendar API for monthly displays, however i am unsure how to convert this to a weekly calendar.
Ideally 7 JLists will always be available in the panel in order M,T,W,T,F,S,S but some will be set to inactive (for example in the first and last weeks of the month).
If anyone has any suggestions please could you help me out :)
Sorry if what im trying to do is a bit confusing.
I've included the code i've been using for the monthly calendar
THANKS!!
public class CalendarPanel extends JPanel implements ActionListener {
private Calendar panelDate;
private Label monthLabel;
private Label yearLabel;
private Panel daysPanel;
private Vector calendarListeners;
private static final String days[] = {"S","M","T","W","T","F","S"};
public CalendarPanel(){
super(new BorderLayout());
panelDate = Calendar.getInstance();
buildUI();
public CalendarPanel(Calendar date){
super(new BorderLayout());
panelDate = (date != null) ? (Calendar)date.clone() : Calendar.getInstance();
buildUI();
public CalendarPanel(Date date){
super(new BorderLayout());
panelDate = Calendar.getInstance();
if(date != null) panelDate.setTime(date);
buildUI();
public Calendar getCalendar(){ return panelDate;}
public void setCalendar(Calendar date){
if(date != null){
panelDate = (Calendar)date.clone();
redrawPanel();
public void setCalendar(Date date){
if(date != null){
panelDate.setTime(date);
redrawPanel();
public int getYear(){ return panelDate.get(Calendar.YEAR);}
public String getMonthName(){
switch(panelDate.get(Calendar.MONTH)){
case Calendar.JANUARY: return "January";
case Calendar.FEBRUARY: return "February";
case Calendar.MARCH: return "March";
case Calendar.APRIL: return "April";
case Calendar.MAY: return "May";
case Calendar.JUNE: return "June";
case Calendar.JULY: return "July";
case Calendar.AUGUST: return "August";
case Calendar.SEPTEMBER: return "September";
case Calendar.OCTOBER: return "October";
case Calendar.NOVEMBER: return "November";
case Calendar.DECEMBER: return "December";
case Calendar.UNDECIMBER: return "Undecimber";
default: return "Unknown";
private void buildUI(){
this.add(buildHeaderPanel(), BorderLayout.NORTH);
daysPanel = new Panel(new GridBagLayout());
redrawPanel();
this.add(daysPanel, BorderLayout.CENTER);
// build the part of the gui that contains the month and year
// labels with their incrementors / decrementors
private Panel buildHeaderPanel(){
monthLabel = new Label(getMonthName(), Label.CENTER);
yearLabel = new Label(Integer.toString(panelDate.get(Calendar.YEAR)),
Label.CENTER);
GridBagConstraints gbc = new GridBagConstraints();
Panel headerPanel = new Panel(new GridBagLayout());
// month label and buttons
Panel panel = new Panel(new GridBagLayout());
Button button = new Button("-");
button.setActionCommand("decrease month");
button.addActionListener(this);
gbc.anchor = GridBagConstraints.EAST;
panel.add(button, gbc);
gbc.anchor = GridBagConstraints.CENTER;
panel.add(monthLabel, gbc);
button = new Button("+");
button.setActionCommand("increase month");
button.addActionListener(this);
gbc.anchor = GridBagConstraints.WEST;
panel.add(button, gbc);
gbc.anchor = GridBagConstraints.CENTER;
gbc.weightx = 1;
headerPanel.add(panel, gbc);
// year label and buttons
panel = new Panel(new GridBagLayout());
button = new Button("-");
button.setActionCommand("decrease year");
button.addActionListener(this);
gbc.anchor = GridBagConstraints.EAST;
gbc.weightx = 0;
panel.add(button, gbc);
gbc.anchor = GridBagConstraints.CENTER;
panel.add(yearLabel, gbc);
button = new Button("+");
button.setActionCommand("increase year");
button.addActionListener(this);
gbc.anchor = GridBagConstraints.WEST;
panel.add(button, gbc);
gbc.anchor = GridBagConstraints.CENTER;
gbc.weightx = 1;
headerPanel.add(panel, gbc);
return headerPanel;
// redraws the entire panel, including relaying out of
// the days buttons
private void redrawPanel(){
monthLabel.setText(getMonthName());
yearLabel.setText(Integer.toString(getYear()));
// redraw days panel
GridBagConstraints gbc = new GridBagConstraints();
// clear current days panel
daysPanel.removeAll();
gbc.fill = GridBagConstraints.BOTH;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 1;
gbc.weighty = 1;
// add days of week
for(int i = 0; i < days.length; i++, gbc.gridx++)
daysPanel.add(new Label(days, Label.CENTER), gbc);
gbc.gridx = 0;
gbc.gridy++;
// days of month
Button button; // day buttons
JTable day = new JTable();
Calendar today = Calendar.getInstance();
Calendar cellDay = (Calendar)today.clone();
int month = panelDate.get(Calendar.MONTH);
int year = panelDate.get(Calendar.YEAR);
// start with first of panels month
cellDay.set(year, month, 1);
gbc.gridx = cellDay.get(Calendar.DAY_OF_WEEK) - 1;
while( cellDay.get(Calendar.MONTH) == month ){
if(gbc.gridx > 6){
gbc.gridy++;
gbc.gridx = 0;
button = new Button(Integer.toString(cellDay.get(Calendar.DATE)));
button.addActionListener(this);
if( cellDay.equals(today)){
button.setForeground(Color.red);
daysPanel.add(button, gbc);
gbc.gridx++;
cellDay.add(Calendar.DAY_OF_MONTH, 1);
// re validate entire panel
validate();
// implementation of ActionListener interface
// currently no real need to create subclassed action
// events for calendar. All actions generated by this
// are action events (generated from the buttons).
// the action command will be one of the four below
// or a number (the label of the day button!).
public void actionPerformed(ActionEvent ae){
String command = ae.getActionCommand();
if(command.equals("increase month")){
panelDate.add(Calendar.MONTH, 1);
redrawPanel();
} else if(command.equals("decrease month")){
panelDate.add(Calendar.MONTH, -1);
redrawPanel();
} else if(command.equals("increase year")){
panelDate.add(Calendar.YEAR, 1);
redrawPanel();
} else if(command.equals("decrease year")){
panelDate.add(Calendar.YEAR, -1);
redrawPanel();
notifyCalendarListeners(ae);
// methods for keeping track of interested listeners
public void addCalendarActionListener(ActionListener al){
if(al != null){
if(calendarListeners == null) calendarListeners = new Vector();
calendarListeners.addElement(al);
public void removeCalendarActionListener(ActionListener al){
if((calendarListeners != null) && (al != null)){
calendarListeners.removeElement(al);
private void notifyCalendarListeners(ActionEvent ae){
if((calendarListeners != null) && (!calendarListeners.isEmpty())){
java.util.Enumeration e = calendarListeners.elements();
while(e.hasMoreElements())
((ActionListener)e.nextElement()).actionPerformed(ae);Hi,
Sorry for the change of screen name, i'm having trouble with my old account.
I have now got most of the system working. However I am having trouble working out how to stop the last days of the previous month appearing in the first week of the next month. For example on 'July 2008' , days 29 and 30 of June are present in the first week of July. How can i get rid of this? And also for the last week of the month, how to get rid of the first days of the next month?
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Label;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Vector;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;
import javax.swing.border.EtchedBorder;
* @category CalendarSystem
* @author Daniel Barrett
public class CalendarSystem extends JPanel implements ActionListener, MouseListener, KeyListener {
JPanel events = new JPanel();
JPanel action = new JPanel();
//Events Panel
DateComboBox eventDateChooser = new DateComboBox();
JTextField ref = new JTextField(10);
JTextArea eventDetails = new JTextArea();
JScrollPane scrollingArea = new JScrollPane(eventDetails);
JTextField dateF = new JTextField(15);
JTextField timeF = new JTextField(15);
String[] minutes = {"00","01","02","03","04","05","06","07","08","09","10","11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","27","28","29","30","31","32","33","34","35","36","37","38","39","40","41","42","43","44","45","46","47","48","49","50","51","52","53","54","55","56","57","58","59"};
String[] hours = {"00","01","02","03","04","05","06","07","08","09","10","11","12","13","14","15","16","17","18","19","20","21","22","23"};
JComboBox minsComb = new JComboBox(minutes);
JComboBox hourComb = new JComboBox(hours);
//Actions Panel
JButton delete = new JButton("Delete");
JButton purge = new JButton("Purge");
JButton add = new JButton("Add");
JButton edit = new JButton("Edit");
JButton mview = new JButton("Month View");
protected JLabel monthLabel;
protected JLabel weekLabel;
protected JLabel lmonday = new JLabel("");
protected JLabel ltuesday = new JLabel("");
protected JLabel lwednesday = new JLabel("");
protected JLabel lthursday = new JLabel("");
protected JLabel lfriday = new JLabel("");
protected JLabel lsaturday = new JLabel("");
protected JLabel lsunday = new JLabel("");
protected Calendar calendar;
protected SimpleDateFormat monthFormat = new SimpleDateFormat("MMM yyyy");
protected SimpleDateFormat dayFormat = new SimpleDateFormat("MMM");
JPanel monthCont = new JPanel();
JPanel weekCont = new JPanel();
JPanel yearCont = new JPanel();
JPanel daysOfWeek = new JPanel();
JPanel monday = new JPanel();
JPanel tuesday = new JPanel();
JPanel wednesday = new JPanel();
JPanel thursday = new JPanel();
JPanel friday = new JPanel();
JPanel saturday = new JPanel();
JPanel sunday = new JPanel();
JList mondayEvents = new JList();
JScrollPane mondayEventsScroll = new JScrollPane(mondayEvents);
JList tuesdayEvents = new JList();
JScrollPane tuesdayEventsScroll = new JScrollPane(tuesdayEvents);
JList wednesdayEvents = new JList();
JScrollPane wednesdayEventsScroll = new JScrollPane(wednesdayEvents);
JList thursdayEvents = new JList();
JScrollPane thursdayEventsScroll = new JScrollPane(thursdayEvents);
JList fridayEvents = new JList();
JScrollPane fridayEventsScroll = new JScrollPane(fridayEvents);
JList saturdayEvents = new JList();
JScrollPane saturdayEventsScroll = new JScrollPane(saturdayEvents);
JList sundayEvents = new JList();
JScrollPane sundayEventsScroll = new JScrollPane(sundayEvents);
protected Color selectedBackground;
protected Color selectedForeground;
protected Color background;
protected Color foreground;
public CalendarSystem(){
setupDays();
setupHeaders();
setupEvents();
setupActions();
this.calendar = Calendar.getInstance();
this.calendar.setFirstDayOfWeek(Calendar.SUNDAY);
this.add(this.monthCont);
this.add(this.daysOfWeek);
this.add(this.weekCont);
this.add(this.events);
this.add(this.action);
this.setLayout(new BoxLayout(this,1));
this.setMaximumSize(new Dimension(400,30));
this.updateCalendar();
private void setupActions() {
this.action.setBorder(BorderFactory.createTitledBorder("Actions"));
this.action.add(this.add);
this.action.add(this.edit);
this.action.add(this.delete);
this.action.add(this.purge);
this.action.add(this.mview);
private void setupEvents() {
this.events.setBorder(BorderFactory.createTitledBorder("Event Details"));
this.events.setLayout(new BoxLayout(this.events,1));
JPanel row1 = new JPanel();
JPanel row2 = new JPanel();
JPanel row3 = new JPanel();
JLabel la = new JLabel("Reference");
JLabel da = new JLabel("Date");
JLabel time = new JLabel("Time");
JLabel det = new JLabel("Details");
this.ref.setEditable(false);
this.dateF.setEditable(false);
this.timeF.setEditable(false);
this.eventDetails.setEditable(false);
row1.add(la);
row1.add(this.ref);
row1.add(da);
row1.add(this.dateF);
row1.add(time);
row1.add(this.timeF);
row2.add(det);
scrollingArea.setPreferredSize(new Dimension(600,50));
row3.add(this.scrollingArea);
this.events.add(row1);
this.events.add(row2);
this.events.add(row3);
protected JLabel createUpdateButton(final int field, final int amount, final boolean month) {
final JLabel label = new JLabel();
final Border selectedBorder = new EtchedBorder();
final Border unselectedBorder = new EmptyBorder(selectedBorder.getBorderInsets(new JLabel()));
label.setBorder(unselectedBorder);
label.setForeground(foreground);
label.addMouseListener(new MouseAdapter() {
public void mouseReleased(MouseEvent e) {
calendar.add(field, amount);
if(month){
updateMCalendar();}
else{
updateCalendar();
public void mouseEntered(MouseEvent e) {
label.setBorder(selectedBorder);
public void mouseExited(MouseEvent e) {
label.setBorder(unselectedBorder);
return label;
private void updateMCalendar() {
this.calendar.set(Calendar.DAY_OF_MONTH, 1);
updateCalendar();
private void setupHeaders() {
//MONTH CONTROLS
monthCont.setLayout(new BoxLayout(monthCont, BoxLayout.X_AXIS));
monthCont.setBackground(background);
monthCont.setOpaque(true);
JLabel label;
label = createUpdateButton(Calendar.YEAR, -1,false);
label.setText("<<");
label.setToolTipText("Previous Year");
monthCont.add(Box.createHorizontalStrut(12));
monthCont.add(label);
monthCont.add(Box.createHorizontalStrut(12));
label = createUpdateButton(Calendar.MONTH, -1,true);
label.setText("< ");
label.setToolTipText("Previous Month");
monthCont.add(label);
monthLabel =new JLabel("", JLabel.CENTER);
monthLabel.setForeground(foreground);
//monthCont.add(Box.createHorizontalGlue());
monthCont.add(Box.createHorizontalStrut(12));
monthCont.add(monthLabel);
monthCont.add(Box.createHorizontalStrut(12));
//monthCont.add(Box.createHorizontalGlue());
label =createUpdateButton(Calendar.MONTH, 1,true);
label.setText(" >");
label.setToolTipText("Next Month");
monthCont.add(label);
label = createUpdateButton(Calendar.YEAR, 1,false);
label.setText(">>");
label.setToolTipText("Next Year");
monthCont.add(Box.createHorizontalStrut(12));
monthCont.add(label);
monthCont.add(Box.createHorizontalStrut(12));
//WEEK CONTROLS
weekCont.setLayout(new BoxLayout(weekCont, BoxLayout.X_AXIS));
weekCont.setBackground(background);
weekCont.setOpaque(true);
JLabel label1;
label1 = createUpdateButton(Calendar.WEEK_OF_MONTH, -1,false);
label1.setText("<<");
label1.setToolTipText("Previous Week");
weekCont.add(label1);
weekLabel =new JLabel("", JLabel.CENTER);
weekLabel.setForeground(foreground);
JLabel lweek =new JLabel("Week: ", JLabel.CENTER);
lweek.setForeground(foreground);
//monthCont.add(Box.createHorizontalGlue());
weekCont.add(Box.createHorizontalStrut(12));
weekCont.add(lweek);
weekCont.add(weekLabel);
weekCont.add(Box.createHorizontalStrut(12));
//monthCont.add(Box.createHorizontalGlue());
label1 = createUpdateButton(Calendar.WEEK_OF_MONTH, 1,false);
label1.setText(">>");
label1.setToolTipText("Next Week");
weekCont.add(label1);
public void setupDays(){
monday.setLayout(new BoxLayout(monday,1));
tuesday.setLayout(new BoxLayout(tuesday,1));
wednesday.setLayout(new BoxLayout(wednesday,1));
thursday.setLayout(new BoxLayout(thursday,1));
friday.setLayout(new BoxLayout(friday,1));
saturday.setLayout(new BoxLayout(saturday,1));
sunday.setLayout(new BoxLayout(sunday,1));
monday.add(this.lmonday);
monday.add(this.mondayEventsScroll);
monday.setBorder(BorderFactory.createTitledBorder("Monday"));
tuesday.add(this.ltuesday);
tuesday.add(this.tuesdayEventsScroll);
tuesday.setBorder(BorderFactory.createTitledBorder("Tuesday"));
wednesday.add(this.lwednesday);
wednesday.add(this.wednesdayEventsScroll);
wednesday.setBorder(BorderFactory.createTitledBorder("Wednesday"));
thursday.add(this.lthursday);
thursday.add(this.thursdayEventsScroll);
thursday.setBorder(BorderFactory.createTitledBorder("Thursday"));
friday.add(this.lfriday);
friday.add(this.fridayEventsScroll);
friday.setBorder(BorderFactory.createTitledBorder("Friday"));
saturday.add(this.lsaturday);
saturday.add(this.saturdayEventsScroll);
saturday.setBorder(BorderFactory.createTitledBorder("Saturday"));
sunday.add(this.lsunday);
sunday.add(this.sundayEventsScroll);
sunday.setBorder(BorderFactory.createTitledBorder("Sunday"));
this.mondayEventsScroll.setPreferredSize(new Dimension(90,200));
this.monday.setPreferredSize(new Dimension(145,300));
this.tuesdayEventsScroll.setPreferredSize(new Dimension(90,200));
this.tuesday.setPreferredSize(new Dimension(145,300));
this.wednesdayEventsScroll.setPreferredSize(new Dimension(90,200));
this.wednesday.setPreferredSize(new Dimension(145,300));
this.thursdayEventsScroll.setPreferredSize(new Dimension(90,200));
this.thursday.setPreferredSize(new Dimension(145,300));
this.fridayEventsScroll.setPreferredSize(new Dimension(90,200));
this.friday.setPreferredSize(new Dimension(145,300));
this.saturdayEventsScroll.setPreferredSize(new Dimension(90,200));
this.saturday.setPreferredSize(new Dimension(145,300));
this.sundayEventsScroll.setPreferredSize(new Dimension(90,200));
this.sunday.setPreferredSize(new Dimension(145,300));
daysOfWeek.add(this.sunday);
daysOfWeek.add(this.monday);
daysOfWeek.add(this.tuesday);
daysOfWeek.add(this.wednesday);
daysOfWeek.add(this.thursday);
daysOfWeek.add(this.friday);
daysOfWeek.add(this.saturday);
private void updateCalendar() {
monthLabel.setText(monthFormat.format(calendar.getTime()) );
weekLabel.setText(String.valueOf(this.calendar.get(calendar.WEEK_OF_MONTH)));
//Blank out / empty strings for first elements that do not start on sunday
Calendar setupCalendar = (Calendar) calendar.clone();
setupCalendar.set(Calendar.DAY_OF_WEEK, setupCalendar.getFirstDayOfWeek());
// while(setupCalendar.get(Calendar.DAY_OF_WEEK) < calendar.getActualMaximum(Calendar.DAY_OF_WEEK)) {
//System.out.println("day of month: " + setupCalendar.get(Calendar.DAY_OF_MONTH));
//System.out.println("day of week: " + (setupCalendar.get(Calendar.DAY_OF_WEEK)));
//System.out.println("week of month: " + calendar.get(Calendar.WEEK_OF_MONTH) + "\n");
setDayLabels(setupCalendar.get(Calendar.DAY_OF_MONTH),setupCalendar.get(Calendar.DAY_OF_WEEK));
setupCalendar.set(Calendar.DAY_OF_WEEK, setupCalendar.get(Calendar.DAY_OF_WEEK) + 1);
setDayLabels(setupCalendar.get(Calendar.DAY_OF_MONTH),setupCalendar.get(Calendar.DAY_OF_WEEK));
setupCalendar.set(Calendar.DAY_OF_WEEK, setupCalendar.get(Calendar.DAY_OF_WEEK) + 1);
setDayLabels(setupCalendar.get(Calendar.DAY_OF_MONTH),setupCalendar.get(Calendar.DAY_OF_WEEK));
setupCalendar.set(Calendar.DAY_OF_WEEK, setupCalendar.get(Calendar.DAY_OF_WEEK) + 1);
setDayLabels(setupCalendar.get(Calendar.DAY_OF_MONTH),setupCalendar.get(Calendar.DAY_OF_WEEK));
setupCalendar.set(Calendar.DAY_OF_WEEK, setupCalendar.get(Calendar.DAY_OF_WEEK) + 1);
setDayLabels(setupCalendar.get(Calendar.DAY_OF_MONTH),setupCalendar.get(Calendar.DAY_OF_WEEK));
setupCalendar.set(Calendar.DAY_OF_WEEK, setupCalendar.get(Calendar.DAY_OF_WEEK) + 1);
setDayLabels(setupCalendar.get(Calendar.DAY_OF_MONTH),setupCalendar.get(Calendar.DAY_OF_WEEK));
setupCalendar.set(Calendar.DAY_OF_WEEK, setupCalendar.get(Calendar.DAY_OF_WEEK) + 1);
setDayLabels(setupCalendar.get(Calendar.DAY_OF_MONTH),setupCalendar.get(Calendar.DAY_OF_WEEK));
public void setDayLabels(int day, int dayOfWeek){
if(dayOfWeek == 1){
this.lsunday.setText(String.valueOf(day));
if(dayOfWeek == 2){
this.lmonday.setText(String.valueOf(day));
if(dayOfWeek == 3){
this.ltuesday.setText(String.valueOf(day));
if(dayOfWeek == 4){
this.lwednesday.setText(String.valueOf(day));
if(dayOfWeek == 5){
this.lthursday.setText(String.valueOf(day));
if(dayOfWeek == 6){
this.lfriday.setText(String.valueOf(day));
if(dayOfWeek == 7){
this.lsaturday.setText(String.valueOf(day));
@Override
public void actionPerformed(ActionEvent arg0) {
@Override
public void mouseClicked(MouseEvent arg0) {
// TODO Auto-generated method stub
@Override
public void mouseEntered(MouseEvent arg0) {
// TODO Auto-generated method stub
@Override
public void mouseExited(MouseEvent arg0) {
// TODO Auto-generated method stub
@Override
public void mousePressed(MouseEvent arg0) {
// TODO Auto-generated method stub
@Override
public void mouseReleased(MouseEvent arg0) {
// TODO Auto-generated method stub
@Override
public void keyPressed(KeyEvent arg0) {
// TODO Auto-generated method stub
@Override
public void keyReleased(KeyEvent arg0) {
// TODO Auto-generated method stub
@Override
public void keyTyped(KeyEvent arg0) {
// TODO Auto-generated method stub
public static void main(String args[]){
JFrame frame = new JFrame();
frame.setSize(1100, 670);
frame.add(new CalendarSystem());
frame.setVisible(true);
}Thanks
Dan -
Pricing : ABAP to Java conversion help needed
Hi all.
I am basically an ABAP developer. My recent assignment needs some java coding.
It will be very helpful if we anybody helps me in finding the corresponding pricing fields in java.
The abap code is as follows
check : xkomv - kgrpe = ' '.
check: xkomv - xkbetr ne 0.
check : komp - kpein ne 0.
if komp - netwr < 0.
komp - netpr = 0 - komp - netpr.
endif.
xkwert = ( ( ( komp - netpr * ( 100000 + xkomv - xkbetr)) / 100000)
komp-mglme / komp-kumza * komp - kumne / 1000 / komp - kpein )
- komp-netwr.
Please help in converting this abap code to its corresponding java code.
Thanks and Regards
DeepikaHere is the code I have developed: Please check and let me know if there are any changes
import java.math.BigDecimal;
import com.sap.spe.pricing.customizing.PricingCustomizingConstants;
import com.sap.spe.pricing.transactiondata.PricingTransactiondataConstants;
import com.sap.spe.pricing.transactiondata.userexit.IPricingConditionUserExit;
import com.sap.spe.pricing.transactiondata.userexit.IPricingItemUserExit;
import com.sap.spe.pricing.transactiondata.userexit.ValueFormulaAdapter;
public class ZS2S_IPC_ZDCP extends ValueFormulaAdapter {
public BigDecimal overwriteConditionValue(
IPricingItemUserExit item,
IPricingConditionUserExit condition) {
BigDecimal kompKumza = new BigDecimal(String.valueOf(condition.getFraction().getNumerator()));
BigDecimal kompKumne = new BigDecimal(String.valueOf(condition.getFraction().getDenominator()));
boolean xkomvKgrpe = condition.isGroupCondition();
BigDecimal kompKpein = condition.getPricingUnit().getValue();
BigDecimal kompNetwr = item.getNetValue().getValue();
BigDecimal kompNetpr = item.getNetPrice().getValue();
BigDecimal xkomvKbetr = condition.getConditionRate().getValue();
BigDecimal kompMglme = item.getBaseQuantity().getValue();
if ( xkomvKgrpe = true )
return PricingTransactiondataConstants.ZERO;
if ( kompKumza != PricingTransactiondataConstants.ZERO )
return PricingTransactiondataConstants.ZERO;
if ( kompKumne != PricingTransactiondataConstants.ZERO )
return PricingTransactiondataConstants.ZERO;
if ( kompKpein != PricingTransactiondataConstants.ZERO )
return PricingTransactiondataConstants.ZERO;
if (kompNetwr.compareTo(PricingTransactiondataConstants.ZERO) < 0 )
kompNetpr = (PricingTransactiondataConstants.ZERO).subtract(kompNetwr);
BigDecimal y = new BigDecimal("100000");
BigDecimal a = y.add(xkomvKbetr);
BigDecimal temp = kompNetpr.multiply(a);
BigDecimal result1 = temp.divide(y, 2, BigDecimal.ROUND_HALF_UP);
BigDecimal result2 = result1.multiply(kompMglme)
.divide(kompKumza, 2 BigDecimal.ROUND_HALF_UP).multiply(kompKumne).divide(kompKpein, 2, BigDecimal.ROUND_HALF_UP);
BigDecimal Result = result2.subtract(kompNetwr);
return Result;
Edited by: Deepika Mallya on Aug 6, 2009 9:08 AM -
Java Progrramming HELP, Needed Urgently, T hanks
hey guys,
I have this lab I need to be done tomorrow, its been weeks lol of thinking and figuring things out can someone make it work ? Pleaseeeee !
I feel like going out and yelling for help lol I have been trying to figure this out for weeks now.
I am pasting my Lab and My Codes I did so far, And Please I really need this done today at any rate, all help would be kindly appreciated.
A Java program is required that will produce a number of reports based on the data from the Product file. This file contains the product name, cost, quantity and UPC. The file name must be input. Valid data from the file will be loaded into an array.
A menu will provide the following options: (Note there are changes from previous assignment.)
1 Display of all valid product information including extended price and GST including totals sorted by name.
2 Display of all invalid records sorted by name.
3 Search and display a certain product by name.
4 Sort by UPC and use a binary search and display a certain product by UPC. (valid records)
9 Exit.
Processing requirements:
Input the data from a file and load the records into an object array. Use this object array to produce the above reports.
Code a class definition exactly as given in the following UML.
(For specific students: you may code the UPC as an integer but if not numeric throw an exception that is handled in main. Document your choice in your submission).
Product
? Name : String
? UPC : String
? Cost : Real
? Quantity : Integer
+ Product (Name : String, UPC : String, Cost : Real, Quantity : Integer)
+ Calculate Extended Cost() : Real
+ Calculate GST(): Real
Input Record:
Product name: String
UPC: String
Cost: real
Quantity: integer
Output Reports
1. Display of all product information including extended cost and GST including totals of these 3 fields.
Following is a sample of the output required:
************************ Product Cost REPORT ****************************
Product Cost Quantity Extended Cost GST Total Cost
Diamond Necklace 12345678901x 54,321.99 188 10,212,534.12 510,626.71 10,723,160.83
Tissues 98989898989x 1.99 2 3.98 0.20 4.18
TOTALS 10,212,538.10 510,626.91 10,723,165.01
2. Display of all invalid records and the count.
Following is a sample of the output required:
Invalid UPC Records = 1
Count Record
1 Tiara Diamond, 12345678901x, 36020.00, 2
3. Search and display a certain product by name. Display appropriate message if not found.
Following is a sample of the output required:
Enter product name: CrownJewels
CrownJewels 99999999991x 100,000.00 1 100,000.00 5,000.00 $105,000.00
6. Display the product information sorted by name
Following is a sample of the output required:
************************ Product Cost REPORT ****************************
Product Cost Quantity Extended Cost GST Total Cost
CrownJewels 99999999991x 100,000.00 1 100,000.00 5,000.00 $105,000.00
Diamond Necklace 12345678901x 54,321.99 188 10,212,534.12 510,626.71 $10,723,160.83
Pearls 88888888881x 10,000.00 1 10,000.00 500.00 $10,500.00
RubyRing 77777777771x 10,000.00 1 10,000.00 500.00 $10,500.00
Tissues 98989898989x 1.99 2 3.98 0.20 $4.18
TOTALS (complete these values) xxx xxx xxx
Java coding requirements for this assignment
Main methods required
1. Load array with all records. Display exception messages only for records that have invalid data in any of the fields. Return array of valid records and logical size.
2. Validate the UPC. Display each report when requested from the menu.
3. Justify the data in the columns. Right justify numeric fields; left justify the alpha fields.
4. A method for each report required in the menu.
Class methods
5. Use the object method for the extended cost.
6. Use the object method for the GST.
You may use additional methods in the main program but do not add any methods in the class definition.
Use DecimalFormat for rounding.
Create an array to hold the objects. Assume that we only need to process a file of a maximum of 500 records but the file may be larger than 500 records.
A Universal Product Code consists of 12 digits. The first digit (from the left) is the UPC type. The next five digits are the Manufacturer code. The next five digits are the product code which is assigned by the manufacturer. The final digit is the check digit. A person can determine the check digit of a Universal Product Code by doing the following:
Step 1: Sum all of the digits in the odd positions together.
0+4+0+1+5+9 = 19
Step 2: Multiply the sum from Step 1 by 3.
3 * 19 = 57
Step 3: Sum all of the digits in the even positions together.
6+2+0+1+8 = 17
Step 4: Sum together the results from Step 2 and Step 3.
17 + 57 = 74
Step 5: Subtract the sum from the next highest multiple of 10.
80 - 74 = 6 [check digit]
TEST DATA:
Step 1: Create 5 or MORE additional records that will test all conditions. Include these in your documentation. Identify what field is tested in your test data. (Example: error in each field of the record, rounding up, rounding down, valid UPC, invalid UPC, formatting of report, file too large
Step 2: Use the file attached.
GODDDDDDDDDDDDDD lol pasting it made me go crazy,
these are my codes so far, HOwever the problem is ONLY DISPLAY MENU SHOWS, nothing else even though i have enough codes that it can show something,
My codes are as follows:
I am working on Eclipse.
import java.util.Arrays;
import java.util.Scanner;
import java.io.*;
import java.util.*;
import java.io.IOException;
* Name : Sana Ghani
* Date : July 10
public class lab56
public static Scanner file;
public static Scanner parse;
public static Scanner input = new Scanner(System.in);
public static Scanner searchInput = new Scanner(System.in);
public static void main(String[] args) throws Exception
Product1[] validProduct = new Product1[500];
int logicalSize = 0;
int menuChoice=0;
String FileName = getFileName();
displayMenu();
switch(menuChoice)
case 1:
displayAllValidRecords(validProduct, logicalSize);
try
// Open an output stream
OutputStream fout = new FileOutputStream ("myfile.txt");
// Print a line of text
new PrintStream(fout).println ("hello world!");
// Close our output stream
fout.close();
// Catches any error conditions
catch (IOException e)
System.err.println ("Unable to write to file");
System.exit(-1);
break;
case 2:
break;
case 3:
binarySearchByName( validProduct,logicalSize);
break;
case 4:
break;
case 5:
break;
menuChoice = displayMenu();
public static void display(Product1[]validProduct, int logicalSize)throws Exception
String Product, UPC;
double Cost;
int Quantity;
for(int index =0; index<logicalSize; index++)
Product = validProduct[index].GetName();
UPC = validProduct[index].GetUPC();
Cost=validProduct[index].GetCost();
Quantity=validProduct[index].GetQuantity();
System.out.println(Product+"\t\t"+UPC+"\t\t"+Cost+"\t\t"+Quantity);
public static String getFileName()
String fileName;
Scanner input = new Scanner(System.in);
System.out.print("Please enter a file name: ");
fileName = input.next();
return fileName;
public static int displayMenu()
int menuChoice;
boolean validFlag = false;
do
System.out.println("\n\n*************************************");
System.out.println(" Product Display Menu ");
System.out.println("*************************************");
System.out.println("(1)Display All Records");
System.out.println("(2)Display All Invalid Records");
System.out.println("(3)Search by Product Name");
System.out.println("(4)Sort by Product Name");
System.out.println("(5)Exit");
System.out.println("*************************************");
System.out.print("Enter your choice(1-5): ");
menuChoice = input.nextInt();
if ((menuChoice >= 1) && (menuChoice <= 5))
validFlag = true;
if (!validFlag)
System.out.println("You have chosen " + menuChoice + ", " + menuChoice +
" is not valid. Please try again");
}while(!validFlag);
return menuChoice;
public static String loadArray(Product1 [] ValidProduct, String fileName)throws Exception
int logicalSize=0;//will always have to declare
String record;//will always have to declare
String Product, UPC;//variable names from
double Quantity;
double Cost;
Scanner file = new Scanner(new File(fileName));//open
record = file.nextLine();//read a line
record = file.nextLine();//read a line
for(int index = 0; index < ValidProduct.length && file.hasNext(); index++)//check to see if the file has data
record = file.nextLine();
parse = new Scanner(record).useDelimiter(",");
String Name = parse.next();
UPC = parse.next();
Cost = parse.nextDouble();
Quantity=parse.nextDouble();
ValidProduct[index] = new Product1 ( Name, UPC, Cost, (int) Quantity);
// create the object-- call the constructor and pass info
logicalSize++;
return logicalSize+".txt";
public static double roundDouble(double value, int position)
java.math.BigDecimal bd = new java.math.BigDecimal(value);
bd = bd.setScale(position,java.math.BigDecimal.ROUND_UP);
return bd.doubleValue();
* This method will print report about valid records
public static void displayAllRecords( Product1[]valid, int ValidProduct,
Product1[] invalid, int InvalidProduct)
// Print valid records
displayAllValidRecords(valid, ValidProduct);
// Print invalid UPC records
displayAllValidRecords(invalid, InvalidProduct);
public static void displayOneRecord(Product1[]valid, int index)
double extendedCost, GST, SumofGST = 0, // Total Extended Cost
totalCost, SumOfTotalCost = 0; // Total Extended Cost + GST
// Print title
System.out.println(leftJustify("Product", 50) +
leftJustify("UPC", 15) +
rightJustify("Cost", 10) +
rightJustify("Quantity", 5) +
rightJustify("Extended Cost", 15) +
rightJustify("GST", 5) +
rightJustify("Total Cost", 13));
extendedCost = valid[index].CalculateExtendedCost();
extendedCost = roundDouble(extendedCost, 2);
GST = valid[index].CalculateGST();
GST = roundDouble(GST, 2);
totalCost = extendedCost + GST;
totalCost = roundDouble(totalCost, 2);
// justify method ensures all values are of the same size
System.out.println(//leftJustify(i+"",3) + ": " +
leftJustify(valid[index].GetName(), 50) +
leftJustify(valid[index].GetUPC(), 15) +
rightJustify(valid[index].GetCost()+"", 10) +
rightJustify(valid[index].GetQuantity()+"", 5) +
rightJustify(extendedCost+"", 10) +
rightJustify(GST+"", 10) +
rightJustify(totalCost+"", 10));
* This method will print report about valid records
public static void displayAllValidRecords( Product1[]valid, int validCounter)
double extendedCost, sumOfExtendedCost = 0, // Total Extended Cost
GST, sumOfGST = 0, // Total GST
totalCost, sumOfTotalCost = 0; // Total Extended Cost + GST
System.out.println("************************ XYZ Product " +
"Cost REPORT ****************************" +
// Print title
System.out.println(leftJustify("Product", 50) +
leftJustify("UPC", 15) +
rightJustify("Cost", 10) +
rightJustify("Qty", 5) +
rightJustify("Extended Cost", 15) +
rightJustify("GST", 5) +
rightJustify("Total Cost", 13));
// Print Records
for(int i=0; i<validCounter; i++)
extendedCost = valid.CalculateExtendedCost();
extendedCost = roundDouble(extendedCost, 2);
GST = valid[i].CalculateGST();
GST = roundDouble(GST, 2);
totalCost = extendedCost + GST;
totalCost = roundDouble(totalCost, 2);
// justify method ensures all values are of the same size
System.out.println(//leftJustify(i+"",3) + ": " +
leftJustify(valid[i].GetName(), 50) +
leftJustify(valid[i].GetUPC(), 15) +
rightJustify(valid[i].getClass()+"", 10) +
rightJustify(valid[i].GetQuantity()+"", 5) +
rightJustify(extendedCost+"", 10) +
rightJustify(GST+"", 10) +
rightJustify(totalCost+"", 10));
sumOfExtendedCost += extendedCost;
sumOfGST += GST;
sumOfTotalCost += totalCost;
private static void sortByName(Product1 [] ValidProduct, int logicalSize) throws Exception
Product1 temp;
for (int outer = logicalSize-1; outer > 1; outer --)
for (int inner = 0; inner < outer; inner ++)
if (ValidProduct[inner].GetName().compareToIgnoreCase(ValidProduct[inner+1].GetName())>0)
temp = ValidProduct[inner];
ValidProduct[inner] = ValidProduct[inner + 1];
ValidProduct [+ 1] = temp;
public static void binarySearchByName(Product1 [] ValidProduct, int logicalSize)
int high = logicalSize - 1;
int low = 0;
int mid = 0;
int count = 0;
int compare = 0;
boolean found = false;
System.out.print("Enter a product name");
String product = input.nextLine();
while (high >= low && !found)
count += 1;
mid = (high + low) / 2;
compare = ValidProduct[mid].GetName().compareToIgnoreCase(product);
if (compare == 0)
System.out.println("Found: " + ValidProduct[mid].GetName());
found = true;
else if (compare < 0)
low = mid + 1;
else
high = mid - 1;
if (!found)
System.out.println(product + " not found.");
System.out.println(count + " steps");
System.out.println();
public static String leftJustify(String field, int width)
StringBuffer buffer = new StringBuffer(field);
while (buffer.length() < width)
buffer.append(' ');
return buffer.toString();
public static String rightJustify(String field, int width)
StringBuffer buffer = new StringBuffer(field);
while (buffer.length() < width)
buffer.append(' ');
return buffer.toString();
public static void displayValidRecords(Product1 [] ValidProduct, int logicalSize) throws Exception {
long longMAX_POSSIBLE_UPC_CODE = 999999999999L;
// set input stream and get number
Scanner stdin = new Scanner(System.in);
System.out.print("Enter a 12-digit UPC number: ");
long input =stdin.nextLong();
long number = input;
// determine whether number is a possible UPC code
if ((input < 0)|| (input > longMAX_POSSIBLE_UPC_CODE)) {
// not a UPC code
System.out.println(input +"is an invalid UPC code");
else {
// might be a UPC code
// determine digits
int d12 = (int) (number % 10);
number /= 10;
int d11 = (int) (number % 10);
number /= 10;
int d10 = (int) (number % 10);
number /= 10;
int d9 = (int) (number % 10);
number /= 10;
int d8 = (int) (number % 10);
number /= 10;
int d7 = (int) (number % 10);
number /= 10;
int d6 = (int) (number % 10);
number /= 10;
int d5 = (int) (number % 10);
number /= 10;
int d4 = (int) (number % 10);
number /= 10;
int d3 = (int) (number % 10);
number /= 10;
int d2 = (int) (number % 10);
number /= 10;
int d1 = (int) (number % 10);
number /= 10;
// compute sums of first 5 even digits and the odd digits
int m = d2 + d4 d6 d8 + d10;
int n = d1 + d3 d5 d7 + d9 + d11;
// use UPC formula to determine required value for d12
int r = 10 - ((m +3*n) % 10);
// based on r, can test whether number is a UPC code
if (r == d12) {
// is a UPCcode
System.out.println(input+" is a valid UPC code");
else {
// not a UPCcode
System.out.println(input+" is not valid UPC code");
Any help would be great thanks !!
Take care,1) It's your problem that you waited until the last minute before you went for help...not ours. We'll give your problem the same attention as anyone elses...therefore your problem isn't any more urgent than any other problem here.
2) I don't intend on doing your entire assignment. Nor do I intend on reading all of it. If you need help with a specific requirement, then post the information/code relevant to that requirement. I don't know how to help you when you bury the problem inside a 9 mile long essay.
3) Post code in tags so it's formatted and readable. (there's a *code* button up above that makes the tags for you). -
Java newbie help: Need to change a graphic on screen
Hello everyone. I'm a long time C/C++ programmer, and I've been thrust into the Java world when I inherited an incomplete project. If something I mention later on sounds stupid, it's probably because it came that way, or I'm trying to force it into what I know from old experience.
FWIW, the project is being developed with Netbeans.
What I'm after is how to change a graphic object onscreen from within the code, vs. with a device such as a mouse. I'm trying to emulate an LED indicator.
What I've done so far is to try using the enable state, and defining GIFs to display. That didn't work.
I've switched gears a bit, and tried something similar with the selected property, but that will only work if I hit the item with my mouse and click. Also, the item is defined as a jToggleButton.
In general terms, what do I need to do to set this up for the displayed item to change without device input? I've been reading stuff about Buttons, ToggleButtons, Graphics, Images, and Icons, and I'm waaaaaay lost right now.
To add to the frustration is that I've done something similar with Visual C++, and that worked as intended. Harumph.
Help?!?FWIW, the project is being developed with Netbeans.
In case you don't know, you can use any editor to develop java code.
What I'm after is how to change a graphic object onscreen from within the code, vs. with a device such as a mouse. I'm trying to emulate an LED indicator.
What I've done so far is to try using the enable state, and defining GIFs to display. That didn't work.
What happend?
I've switched gears a bit, and tried something similar with the selected property, but that will only work if I hit the item with my mouse and click. Also, the item is defined as a jToggleButton.
Is this not what you wanted? -
Hi, I have just learn java swing and now creating a chess game. I have sucessfully create a board and able to display chess pieces on the board. By using JLayeredPane, I am able to use drag and drop for the piece. However, there is a problem which is that I can drop the chess piece off the board and the piece would disappear. I have try to solve this problem by trying to find the location that the chess piece is on, store it somewhere and check if the chess piece have been drop off bound. However, I could not manage to solve it. Also, I am very confuse with all these layer thing.
Any suggestion would be very helpful. Thanks in advance
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
public class ChessBoard extends JFrame implements MouseListener, MouseMotionListener
Object currentPosition;
Color currentColor;
Dimension boardSize = new Dimension(600, 600);
JLayeredPane layeredPane;
JPanel board;
JPanel box;
JLabel chessPiece;
int xAdjustment;
int yAdjustment;
public ChessBoard()
// Use a Layered Pane for this this application
layeredPane = new JLayeredPane();
getContentPane().add(layeredPane);
layeredPane.setPreferredSize( boardSize );
layeredPane.addMouseListener( this );
layeredPane.addMouseMotionListener( this );
// Add a chess board to the Layered Pane
board = new JPanel();
// set "board" to the lowest layer (default_layer)
layeredPane.add(board, JLayeredPane.DEFAULT_LAYER);
board.setLayout( new GridLayout(8, 8) );
board.setPreferredSize( boardSize );
board.setBounds(0, 0, boardSize.width, boardSize.height);
addShade();
addPiece();
public void addShade()
for (int i = 0; i < 64; i++)
box = new JPanel( new BorderLayout() );
board.add( box, BorderLayout.CENTER );
if( ((i / 8) % 2) == 0)
if( (i % 2) ==0)
box.setBackground(Color.lightGray);
} else {
box.setBackground( Color.white);
} else {
if( (i % 2) ==0)
box.setBackground(Color.white);
} else {
box.setBackground(Color.lightGray);
//Method for adding chess pieces to the board
public void addPiece()
// Add a few pieces to the board
//black pieces
for (int i = 0; i < 64; i++)
//adding black pieces
if (i < 8)
String fileName = i + ".gif";
JLabel blackPieces = new JLabel( new ImageIcon( fileName ) );
JPanel panel = (JPanel)board.getComponent( i );
panel.add( blackPieces );
//adding black pones
if ((i > 7) && (i < 16))
String fileName = "8.gif";
JLabel blackPones = new JLabel( new ImageIcon( fileName ) );
JPanel panel = (JPanel)board.getComponent( i );
panel.add( blackPones );
//jump to white position (Component 48)
if (i == 16) i = 48;
//adding white pones
if(( i > 47 ) && (i < 56))
JLabel whitePones = new JLabel( new ImageIcon("48.gif") );
JPanel panel = (JPanel)board.getComponent( i );
panel.add( whitePones );
//adding white pieces
if (i > 55)
String fileName = i + ".gif";
JLabel whitePieces = new JLabel( new ImageIcon( fileName ) );
JPanel panel = (JPanel)board.getComponent( i);
panel.add( whitePieces );
** Add the selected chess piece to the dragging layer so it can be moved
public void mousePressed(MouseEvent e)
chessPiece = null;
Component c = board.findComponentAt(e.getX(), e.getY());
c.setBackground(Color.red);
if (c instanceof JPanel) return;
Point parentLocation = c.getParent().getLocation();
xAdjustment = parentLocation.x - e.getX();
yAdjustment = parentLocation.y - e.getY();
chessPiece = (JLabel)c;
chessPiece.setLocation(e.getX() + xAdjustment, e.getY() + yAdjustment);
chessPiece.setSize(chessPiece.getWidth(), chessPiece.getHeight());
layeredPane.add(chessPiece, JLayeredPane.DRAG_LAYER);
** Move the chess piece around
public void mouseDragged(MouseEvent me)
if (chessPiece == null) return;
chessPiece.setLocation(me.getX() + xAdjustment, me.getY() + yAdjustment);
** Drop the chess piece back onto the chess board
public void mouseReleased(MouseEvent e)
Component c = board.findComponentAt(e.getX(), e.getY());
int x = (int)c.getBounds().getX();
int y = (int)c.getBounds().getY();
System.out.println(c.getLocation());
System.out.println(x + " "+ y);
c.setBackground(currentColor);
if (chessPiece == null) return;
chessPiece.setVisible(false);
if (c instanceof JLabel)
Container parent = c.getParent();
//remove the piece that is capture
parent.remove(0);
parent.add( chessPiece );
else
Container parent = (Container)c;
parent.add( chessPiece );
chessPiece.setVisible(true);
public void mouseClicked(MouseEvent e) {}
public void mouseMoved(MouseEvent e) {}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
private static void createAndShowGUI()
//Make sure we have nice window decorations
JFrame.setDefaultLookAndFeelDecorated(true);
JFrame frame = new ChessBoard();
frame.setDefaultCloseOperation( JFrame.DISPOSE_ON_CLOSE );
//Display the window
frame.pack();
frame.setResizable( false );
frame.setLocationRelativeTo( null );
frame.setVisible(true);
public static void main(String[] args)
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI
javax.swing.SwingUtilities.invokeLater( new Runnable()
public void run()
createAndShowGUI();
}import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
public class ChessBoardRx extends JFrame implements MouseListener, MouseMotionListener
Object currentPosition;
Color currentColor;
Dimension boardSize = new Dimension(600, 600);
JLayeredPane layeredPane;
JPanel board;
JPanel box;
JLabel chessPiece;
int xAdjustment;
int yAdjustment;
Container lastParent;
public ChessBoardRx()
// Use a Layered Pane for this this application
layeredPane = new JLayeredPane();
getContentPane().add(layeredPane);
layeredPane.setPreferredSize( boardSize );
layeredPane.addMouseListener( this );
layeredPane.addMouseMotionListener( this );
// Add a chess board to the Layered Pane
board = new JPanel();
// set "board" to the lowest layer (default_layer)
layeredPane.add(board, JLayeredPane.DEFAULT_LAYER);
board.setLayout( new GridLayout(8, 8) );
board.setPreferredSize( boardSize );
board.setBounds(0, 0, boardSize.width, boardSize.height);
addShade();
addPiece();
// populateBoard();
public void addShade()
for (int i = 0; i < 64; i++)
box = new JPanel( new BorderLayout() );
board.add( box, BorderLayout.CENTER );
if( ((i / 8) % 2) == 0)
if( (i % 2) ==0)
box.setBackground(Color.lightGray);
} else {
box.setBackground( Color.white);
} else {
if( (i % 2) ==0)
box.setBackground(Color.white);
} else {
box.setBackground(Color.lightGray);
//Method for adding chess pieces to the board
public void addPiece()
// Add a few pieces to the board
//black pieces
for (int i = 0; i < 64; i++)
//adding black pieces
if (i < 8)
String fileName = i + ".gif";
JLabel blackPieces = new JLabel( new ImageIcon( fileName ) );
JPanel panel = (JPanel)board.getComponent( i );
panel.add( blackPieces );
//adding black pones
if ((i > 7) && (i < 16))
String fileName = "8.gif";
JLabel blackPones = new JLabel( new ImageIcon( fileName ) );
JPanel panel = (JPanel)board.getComponent( i );
panel.add( blackPones );
//jump to white position (Component 48)
if (i == 16) i = 48;
//adding white pones
if(( i > 47 ) && (i < 56))
JLabel whitePones = new JLabel( new ImageIcon("48.gif") );
JPanel panel = (JPanel)board.getComponent( i );
panel.add( whitePones );
//adding white pieces
if (i > 55)
String fileName = i + ".gif";
JLabel whitePieces = new JLabel( new ImageIcon( fileName ) );
JPanel panel = (JPanel)board.getComponent( i);
panel.add( whitePieces );
private void populateBoard() {
int[][] pos = {
{ 9, 7, 5, 1, 3, 5, 7, 9 },
{ 8, 6, 4, 0, 2, 4, 6, 8 }
for(int j = 0; j < 8; j++) {
String fileName = "chessImages/" + pos[0][j] + ".jpg";
JLabel label = new JLabel( new ImageIcon( fileName ) );
JPanel panel = (JPanel)board.getComponent( j );
panel.add( label );
for(int j = 8; j < 16; j++) {
String fileName = "chessImages/" + 11 + ".jpg";
JLabel label = new JLabel( new ImageIcon( fileName ) );
JPanel panel = (JPanel)board.getComponent( j );
panel.add( label );
for(int j = 56, k = 0; j < 64; j++, k++) {
String fileName = "chessImages/" + pos[1][k] + ".jpg";
JLabel label = new JLabel( new ImageIcon( fileName ) );
JPanel panel = (JPanel)board.getComponent( j );
panel.add( label );
for(int j = 48; j < 56; j++) {
String fileName = "chessImages/" + 10 + ".jpg";
JLabel label = new JLabel( new ImageIcon( fileName ) );
JPanel panel = (JPanel)board.getComponent( j );
panel.add( label );
** Add the selected chess piece to the dragging layer so it can be moved
public void mousePressed(MouseEvent e)
chessPiece = null;
Component c = board.findComponentAt(e.getX(), e.getY());
c.setBackground(Color.red);
if (c instanceof JPanel) return;
lastParent = c.getParent();
Point parentLocation = c.getParent().getLocation();
xAdjustment = parentLocation.x - e.getX();
yAdjustment = parentLocation.y - e.getY();
chessPiece = (JLabel)c;
chessPiece.setLocation(e.getX() + xAdjustment, e.getY() + yAdjustment);
chessPiece.setSize(chessPiece.getWidth(), chessPiece.getHeight());
layeredPane.add(chessPiece, JLayeredPane.DRAG_LAYER);
** Move the chess piece around
public void mouseDragged(MouseEvent me)
if (chessPiece == null) return;
chessPiece.setLocation(me.getX() + xAdjustment, me.getY() + yAdjustment);
** Drop the chess piece back onto the chess board
public void mouseReleased(MouseEvent e)
Component c = board.findComponentAt(e.getX(), e.getY());
if(c == null) {
layeredPane.remove(chessPiece);
lastParent.add(chessPiece);
Rectangle r = lastParent.getBounds();
chessPiece.setLocation(r.x+xAdjustment, r.y+yAdjustment);
lastParent.validate();
lastParent.repaint();
return;
int x = (int)c.getBounds().getX();
int y = (int)c.getBounds().getY();
System.out.println(c.getLocation());
System.out.println(x + " "+ y);
c.setBackground(currentColor);
if (chessPiece == null) return;
chessPiece.setVisible(false);
if (c instanceof JLabel)
Container parent = c.getParent();
//remove the piece that is capture
parent.remove(0);
parent.add( chessPiece );
else
Container parent = (Container)c;
parent.add( chessPiece );
chessPiece.setVisible(true);
public void mouseClicked(MouseEvent e) {}
public void mouseMoved(MouseEvent e) {}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
private static void createAndShowGUI()
//Make sure we have nice window decorations
JFrame.setDefaultLookAndFeelDecorated(true);
JFrame frame = new ChessBoardRx();
frame.setDefaultCloseOperation( JFrame.DISPOSE_ON_CLOSE );
//Display the window
frame.pack();
frame.setResizable( false );
frame.setLocationRelativeTo( null );
frame.setVisible(true);
public static void main(String[] args)
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI
javax.swing.SwingUtilities.invokeLater( new Runnable()
public void run()
createAndShowGUI();
} -
Basic Java Program help needed urgently.
I have posted the instructions to my project assignment on here that is due tomorrow. I have spent an extremely large amount of time trying to get the basics of programming and am having some difficulty off of the bat. Someone who has more experience with this and could walk me through the steps is what I am hoping for. Any Help however will be greatly appreciated. I am putting in a lot of effort, but I am not getting the results I need. Thank you for the consideration of assisting me with my issues. If you have any questions please feel free to ask. I would love to open up a dialogue.
CIS 120
Mathematical Operators
Project-1
Max possible pts 100
Write a program “MathOperators” that reads two integers, displays user’s name, sum, product,
difference, quotients and modulus of the two numbers.
1. Create a header for your project as follows:
* Prgrammer: Your Name (1 pt) *
* Class: CIS 120 (1 pt) *
* Section: (1 pt) *
* Instructor: (1 pt) *
* Program Name: Mathematical Operators (1 pt) *
* Description: This java program will ask the user to enter two integers and *
display sum, product, difference, quotients and modulus of the two numbers
* (5 pts) *
2. Display a friendly message e.g. Good Morning!! (2 pts)
3. Explain your program to the user e.g. This java program can add, subtract, multiply,
divide and calculate remainder of any two integer numbers entered by you. Let’s get
started…. (5 pts)
4. Prompt the user- Please enter your first name, store the value entered by user in a
string variable name. Use input.next() instead of input.nextLine(). (8 pts)
5. Prompt the user- name, enter first integer number , store the value entered by user in
an integer variable num1.(5 pts)
6. Prompt the user- name, enter second integer number , store the value entered by user in
an integer variable num2.(5 pts)
7. Display the numbers entered by the user as: name has entered the numbers num1and
num2.(5 pts)
8. Calculate sum, product, difference, quotients and modulus of the two numbers. ( 30 pts)
9. Display sum, product, difference, quotients and modulus of the two numbers. ( 10 pts)
10. Terminate your program with a friendly message like- Thanks for using my program,
have a nice day!!(2 pts)Nice try. You have not demonstrated that you've at least TRIED to do something. No one is going to do your homework for you. Your "urgency" is yours alone.
-
Basic java problem help needed please
the problem is :
to produce a program which will show membership rates for a golf club..
membership yearly rate new member joining fee
category
full 650 3000
associate 200
ladies 350 2000
under 18 175
new members must pay a joining fee in addition to the yearly rate as shown
full/ladies members also prepay 150
write a program which will enter details of members,calculate and output the total amount each member should pay.
output number of members in each category
the total income for each category....
i need this program to show each category individually...cant do it at all..been at it a week....must be me && and || signs...i think...plz can someone help me as im really stuck now...thank you so much..
import java.util.Scanner;
public class assignmentquestion3 {
public static Scanner key=new Scanner(System.in);
public static void main(String []args){
int fullfee=800,newfullfee=3800,associatefee=200,newla diesfee= 2350,ladiesfee= 350,under18fee = 175;
int selectcat=0;
int reply = 0;
int addmember=0;
int currentfulltotalmem=0,newfulltotalmem=0,associatet otalmem=0,ladiestotalmem=0,under18totalmem=0;
int assoctotalcash=0,ladiestotalcash=0,under18totalcas h=0;
int fullprepay=150;
int ladiesfull=2500;
int completefull = 0;
int ladiescurrent=500;
int under18=175;
//Main introduction screen for the user and selections available. do while loops only allowing numbers 1,2,3 or 4.
do{
do{
System.out.printf("\n\t %90s","********************Membership Rates For The Golf Club********************");
System.out.printf("\n\n %105s","This program will allow users to enter details of members as well as calculating and.");
System.out.printf("\n%106s","outputing the total amount each member should pay. The program allows users to view the");
System.out.printf("\n%106s","total number of members in each category and the total income for each category.");
System.out.printf("\n\n\t %75s","Please select your membership category: ");
System.out.printf("\n\n\t %68s","Please press '1' for FULL");
System.out.printf("\n\n\t %68s","Please press '2' for ASSOCIATE");
System.out.printf("\n\n\t %68s","Please press '3' for LADIES");
System.out.printf("\n\n\t %68s","Please press '4' for UNDER 18");
System.out.printf("\n\n\t %68s","Please enter 1,2,3 or 4: ");
selectcat=key.nextInt();
}while (selectcat>4 || selectcat<1);
do{
System.out.printf("\n\n\t %75s","Are you a Current Member (press 1) or a New Member (press 2): ");
reply=key.nextInt();
}while (reply<1 || reply>2);
//if number '1' for 'FULL' category is selected by the user and reply is 'yes'(1) then new full member fee is shown to user
if (selectcat==1 ||reply==1)
System.out.printf("\n\n\t %68s","CURRENT FULL MEMBERSHIP SELECTED");
System.out.printf("\n\n\t %68s","Current full membership fees yearly are "+fullfee+"");
System.out.printf("\n\n\t %68s","Full members must also pre-pay "+fullprepay+" on a card can be used in the club facilities such as bar and shop ");
System.out.printf("\n\n\t %72s","The total of this membership is: "+fullfee+"");
currentfulltotalmem=currentfulltotalmem+1;
System.out.printf("\n\n\t %72s","The total number of 'CURRENT FULL MEMBERSHIPS = "+currentfulltotalmem+"");
completefull=completefull+fullfee;
System.out.printf("\n\n\t %68s","The total amount of income for 'FULL MEMBERSHIPS' within the club = "+completefull+"");
//if number '1' is selected by the user and reply is 'no' (2) then full member fee is shown to user
else if (selectcat==1 &&reply==2)
System.out.printf("\n\n\t %68s","NEW FULL MEMBERSHIP SELECTED");
System.out.printf("\n\n\t %68s","Full membership fees yearly are "+newfullfee+"");
newfulltotalmem=newfulltotalmem+1;
System.out.printf("\n\n\t %68s","The total number of 'NEW FULL MEMBERSHIPS = "+newfulltotalmem+"");
completefull=completefull+newfullfee;
System.out.printf("\n\n\t %68s","The total amount of income for 'FULL MEMBERSHIPS' within the club = "+completefull+"");
//if number '2' is selected by the user then associate member fee is shown to user
if (selectcat==2 &&(reply==1 || reply==2))
System.out.printf("\n\n\t %75s","ASSOCIATE MEMBERSHIP SELECTED");
System.out.printf("\n\n\t %75s","ASSOCIATE membership fees yearly are "+associatefee+"");
associatetotalmem=associatetotalmem+1;
System.out.printf("\n\n\t %75s","The total number of 'ASSOCIATE MEMBERSHIPS' WITHIN THE CLUB = "+associatetotalmem+"");
assoctotalcash=assoctotalcash+associatefee;
System.out.printf("\n\n\t %68s","The total amount of income for 'ASSOCIATE MEMBERSHIPS' within the club = "+assoctotalcash+"");
//if number '3' is selected by the user and reply is 'yes' then new ladies member fee is shown to user
if (selectcat==3 &&reply==1)
System.out.printf("\n\n\t %68s","LADIES CURRENT MEMBERSHIP SELECTED");
System.out.printf("\n\n\t %68s","Ladies full membership fees yearly are "+ladiesfee+"");
System.out.printf("\n\n\t %68s","Ladies must also pre-pay "+fullprepay+" on a card can be used in the club facilities such as bar and shop ");
System.out.printf("\n\n\t %68s","The total of this membership is: "+ladiescurrent+"");
ladiestotalmem=ladiestotalmem+1;
System.out.printf("\n\n\t %75s","The total number of 'LADIES MEMBERSHIPS' WITHIN THE CLUB = "+ladiestotalmem+"");
ladiestotalcash=ladiestotalcash+ladiescurrent;
System.out.printf("\n\n\t %68s","The total amount of income for 'LADIES MEMBERSHIPS' within the club = "+ladiestotalcash+"");
//if number '3' is selected by the user and reply is 'no' then the current ladies member fee is shown to user
else
if (selectcat==3 && reply==2)
System.out.printf("\n\n\t %68s","LADIES NEW MEMBERSHIP SELECTED");
System.out.printf("\n\n\t %68s","LADIES NEW MEMBERSHIP fees yearly are "+newladiesfee+"");
System.out.printf("\n\n\t %68s","Ladies must also pre-pay "+fullprepay+" on a card can be used in the club facilities such as bar and shop ");
System.out.printf("\n\n\t %68s","The total of this membership is: "+ladiesfull+"");
ladiestotalmem=ladiestotalmem+1;
System.out.printf("\n\n\t %75s","The total number of 'LADIES MEMBERSHIPS' within the club = "+ladiestotalmem+"");
ladiestotalcash=ladiestotalcash+ladiesfull;
System.out.printf("\n\n\t %68s","The total amount of income for 'LADIES MEMBERSHIPS' within the club = "+ladiestotalcash+"");
//if number '4' is selected by the user then under 18 member fee is shown to user
else if (selectcat==4 &&(reply==1||reply==2))
System.out.printf("\n\n\t %75s","UNDER 18 MEMBERSHIP SELECTED");
System.out.printf("\n\n\t %75s","UNDER 18 yearly membership fees are "+under18fee+"");}
System.out.printf("\n\n\t %68s","The total of this membership is: "+under18+"");
under18totalmem=under18totalmem+1;
System.out.printf("\n\n\t %75s","The total number of 'UNDER 18 MEMBERSHIPS' within the club = "+under18totalmem+"");
under18totalcash=under18totalcash+under18;
System.out.printf("\n\n\t %68s","The total amount of income for 'UNDER 18 MEMBERSHIPS' within the club = "+under18totalcash+"");
//allowing user to select '0' to add another member or any other key to exit program
System.out.printf("\n\n\t %68s","Please Press '0' to add another member or any other key to exit.: ");
addmember=key.nextInt();
}while (addmember==0 ||addmember>1);}}
the problem im having is whenever i make the choices 1,2,3,4 (CATEgorys) AND hit 1 or 2(current or new member selections) it brings up more than one category...
for example when i hit 1(Category full) and 1(current member)..it displays this:
Are you a Current Member (press 1) or a New Member (press 2): 1
CURRENT FULL MEMBERSHIP SELECTED
Current full membership fees yearly are 800
Full members must also pre-pay 150 on a card can be used in the club facilities such as bar and shop
The total of this membership is: 800
The total number of 'CURRENT FULL MEMBERSHIPS = 1
The total amount of income for 'FULL MEMBERSHIPS' within the club = 800
The total of this membership is: 175
The total number of 'UNDER 18 MEMBERSHIPS' within the club = 1
The total amount of income for 'UNDER 18 MEMBERSHIPS' within the club = 175
Please Press '0' to add another member or any other key to exit.:
under 18 membership as well?...does this for other selections too...is it my arithmetic operators?....my if loops?...Multi-post [http://forums.sun.com/thread.jspa?threadID=5346248&messageID=10498270#10498270]
And it still doesn't compile. -
Stupid Java Question (Help Needed!!!)
I have a piece of Java Code that dynamically builds a SQL statement (including VARCHAR2 columns). Oracle gives an error if my string has a single quote in it. I need to replace each single quote with two single quotes in Java, i.e. I need a Java equivalent of PL/SQL REPLACE function.
Java str.replace only replaces an individual character (see below).
String l_str = "O'Hara";
String l_str2 = l_str.replace('\'', '\'');
I need to replace "O'Hara" with "O''Hara". Any help is appreciatedPlease don't post same question on both forums.
Please find the answer at:
Re: ORA-09004 -
Importing XML into Java. Help needed Please!!!
Hi,
I have downloaded j2sdk1.4.1_05 and want to configure it to import XML files into a DOM in Java. I am having trouble doing this and need help. I read that version 1.4 support JAXP 1.1 but I am having trouble finding the JAXP-api.jar file. It says to put all the other Jar files into a folder and leave the JAXP-api.jar.
Could you please tell me how to set up Java so that I can import an XML file. I also downloaded JAXP 1.2. But there seems to be no installer.
Thanx JohnYou can learn about reading xml in java by reading the J2EE tutorial at
http://java.sun.com/j2ee/1.4/docs/tutorial/doc/
Here is sample program to read XML file into a DOM taken from this tutorial
(http://java.sun.com/j2ee/1.4/docs/tutorial/doc/JAXPXSLT4.html)
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.w3c.dom.Document;
import org.w3c.dom.DOMException;
import java.io.*;
public class TransformationApp
static Document document;
public static void main(String argv[])
if (argv.length != 1) {
System.err.println (
"Usage: java TransformationApp filename");
System.exit (1);
DocumentBuilderFactory factory =
DocumentBuilderFactory.newInstance();
//factory.setNamespaceAware(true);
//factory.setValidating(true);
try {
File f = new File(argv[0]);
DocumentBuilder builder =
factory.newDocumentBuilder();
document = builder.parse(f);
} catch (SAXParseException spe) {
// Error generated by the parser
System.out.println("\n** Parsing error"
+ ", line " + spe.getLineNumber()
+ ", uri " + spe.getSystemId());
System.out.println(" " + spe.getMessage() );
// Use the contained exception, if any
Exception x = spe;
if (spe.getException() != null)
x = spe.getException();
x.printStackTrace();
} catch (SAXException sxe) {
// Error generated by this application
// (or a parser-initialization error)
Exception x = sxe;
if (sxe.getException() != null)
x = sxe.getException();
x.printStackTrace();
} catch (ParserConfigurationException pce) {
// Parser with specified options can't be built
pce.printStackTrace();
} catch (IOException ioe) {
// I/O error
ioe.printStackTrace();
} // main
} If you have java 1.4 sdk installed everything should compile and run. Separate
JAXP package is nor required - JAXP is included in rt.jar in java-home-directory/jre/lib. -
Psuedocode to java.. help needed
this is the start of psuedocode i need to convert into java:
Roll a 12 sided die to choose a number in the range 1.....12
While the user has not made an incorrect guess
Ask the uer to guess whether they think the next number will be higher
or lower
it goes on to other topics but i was just wondering if anyone knew how
to begin, especially the prediction or random output of a number by the
computer..
if anyone can help then that'd be great, thank you
stevehey again, cheers for the hint.. i have been working hard on a simpler program and have only one error surround the 'if' statement.. how does this look to you?? i can't find the error however.
import java.util.Scanner;
public class dice
public static void main (String [] args)
Scanner in = new Scanner(System.in);
Random rnd = new Random();
int r = rnd.nextInt(12) + 1;
System.out.print("guess a number ");
int x = in.nextInt();
while (x != r);
System.out.print("Guess incorrect, choose hi or low ");
int hi = in.nextInt();
int low = in.nextInt();
if
(hi > r); {
System.out.print("correct ");
if (low < r);
System.out.print("correct ");
else
System.out.print("spot on! ")
} -
Java SDK Help Needed URGENTLY!
Hi, as part of my uni course I am required to learn Java. Until now, I have only used it at uni and everything works fine. However, I decided to download Java 2 SDK from the Sun website (version 1.3.1_01).
I am using Textpad as the editor and just installed Java by running the 32mb installer file. Textpad works fine and Java was installed to c:\jdk1.3.1_01
Now, i created this simple program (from my tutorial notes) in Textpad:
// The code below is held in a file called Exmpl1.java
// This is Example1
// The program requires you to type in your name.
// Your name and a welcome message are then output to the screen
import java.io.*;
class Exmpl1M
static BufferedReader keyboard = new
BufferedReader (new InputStreamReader(System.in));
static PrintWriter screen = new PrintWriter(System.out,true);
public static void main (String[] args) throws IOException
String name; // The place to store data entered from the keyboard
// Prompt to the user of the program
screen.print("Please enter your name ");
screen.flush();
// Get the data (a name) entered at the keyboard
name = keyboard.readLine();
screen.print("\n\nHello " + name );
screen.println(" - Welcome to programming with Java\n\n");
String lab; // The place to store data entered from the keyboard
screen.print("What lab are you working in? ");
screen.flush();
// Get the data (a lab) entered at the keyboard
lab = keyboard.readLine();
screen.println("\n\n" + lab + "is a nice place to work!" );
} // End of method main
} // End of class Exmpl1M
I know this file works ok because i have tested it on the uni computers. The Exmpl1M.class file is created where the Exmpl1M.java file is stored. It will compile fine using the Tools>Compile Java menu option.
Now, here is the problem: when i go to Tools>Run Java Application, I get the message
"Exception in thread "main" java.lang.NoClassDefFoundError: Exmpl1M
Press any key to continue..."
Now, seeing as how i am new to Java, i have no idea why i am getting this message. Should I have changed any settings when i installed Java? I'm guessing it may have something to do with "method main" in the coding, but we have always been told to put this but not told why.
Please help cause i need to be able to write the progs at home tooIs the name of the class the same as the class file
Maybe you mixed up Exmple1 and Exmpl1M
If this is ok then try this:
I do not know Textpad so
open Terminal/Console/DOS-Box go to directory where your Exmpl1.class file is located.
Type in
java Exmpl1
If the program runs now some configuration in Textpad is wrong.
Horst
Hi, as part of my uni course I am required to learn
Java. Until now, I have only used it at uni and
everything works fine. However, I decided to download
Java 2 SDK from the Sun website (version 1.3.1_01).
I am using Textpad as the editor and just installed
Java by running the 32mb installer file. Textpad works
fine and Java was installed to c:\jdk1.3.1_01
Now, i created this simple program (from my tutorial
notes) in Textpad:
I know this file works ok because i have tested it on
the uni computers. The Exmpl1M.class file is created
where the Exmpl1M.java file is stored. It will compile
fine using the Tools>Compile Java menu option.
Now, here is the problem: when i go to Tools>Run Java
Application, I get the message
"Exception in thread "main"
java.lang.NoClassDefFoundError: Exmpl1M
Press any key to continue..."
Now, seeing as how i am new to Java, i have no idea
why i am getting this message. Should I have changed
any settings when i installed Java? I'm guessing it
may have something to do with "method main" in the
coding, but we have always been told to put this but
not told why.
Please help cause i need to be able to write the progs
at home too -
i need java code for writing following lines in a file
<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"
"http://www.wapforum.org/DTD/wml_1.1.xml">
Moreover i need code for reading word by word html file.
PLease reply as soon as possible.
iwapsmsfor the html-part there are several html-parser, that bould whole parsetrees, which you can traverse (walk) through as you whish. just check google for it (something like: java html parser).
if that xml you have there is in String-form, just use a Filewriter
BufferedWriter writer = new BufferedWriter (new FileWriter (new File ("FilePath/filename.xml")));
writer.write (xmlString);
writer.close();however, if you have to juggle xml tags, content and attributes a lot, i'd recomend jdom to construct the xml and saxParser to write it.
again jsut google for it. -
Java code help needed for If-elseif statement
HI All,
Apologies for posting such a trivial thing but I am a novice in Java.
All I need is to code an If elseIF statement.
I tried the code below
String w = "SAPA";
String x = "SAPB";
if (a==w) ;
{Channel channel = LookupService.getChannel("BS_PROD","CC_RFC_LOOKUP");}
else if (a==x)
{ Channel channel = LookupService.getChannel("BS_PROD","CC_RFC_LOOKUP_ECQ"); }
It came back with the error
Source code has syntax error: D:/usr/sap/XRD/DVEBMGS02/j2ee/cluster/server0/./temp/classpath_resolver/Map695b77619ad011dd8d0b001a4b52813a/source/com/sap/xi/tf/_MM_TRANSMISSION_CHECK_TO_GENIUS_.java:324: 'else' without 'if' else if (a==x) ^ 1 error
Appreciate if you could let me know the correct code.
Many thanks
ShirinHI Aamir,
After I removed the semi-colon iIt came back with the following error
Source code has syntax error: D:/usr/sap/XRD/DVEBMGS02/j2ee/cluster/server0/./temp/classpath_resolver/Map1d9b43e09ad111dd84b7001a4b52813a/source/com/sap/xi/tf/_MM_TRANSMISSION_CHECK_TO_GENIUS_.java:328: cannot resolve symbol symbol : variable channel location: class com.sap.xi.tf._MM_TRANSMISSION_CHECK_TO_GENIUS_ accessor = LookupService.getRfcAccessor(channel); ^ 1 error
Just for reference my entire Jave UDF looks like this:
//write your code here
String w = "SAPA";
String x = "SAPB";
String content = "";
MappingTrace importanttrace;
importanttrace = container.getTrace() ;
//Filling the string with our RFC-XML (With Values)
String m = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><ns0:ZIFMS_GET_NEXT_NUMBER xmlns:ns0=\"urn:sap-com:document:sap:rfc:functions\"><I_NR_RANGE_NR>01</I_NR_RANGE_NR><I_OBJECT>ZIFMS_INT</I_OBJECT></ns0:ZIFMS_GET_NEXT_NUMBER>";
RfcAccessor accessor = null;
ByteArrayOutputStream out = null;
try
//1. Determine a channel (Business System, Communication channel)
if (a==w)
{Channel channel = LookupService.getChannel("BS_PROD","CC_RFC_LOOKUP");}
else if (a==x)
{ Channel channel = LookupService.getChannel("BS_PROD","CC_RFC_LOOKUP_ECQ"); }
//2. Get a RFC accesor for a channel.
accessor = LookupService.getRfcAccessor(channel);
//3. Create a xml input stream representing the FM request message.
InputStream inputstream = new ByteArrayInputStream(m.getBytes());
//4. Create xml Payload
XmlPayload payload = LookupService.getXmlPayload(inputstream);
//5. Execute Lookup
Payload result = accessor.call(payload);
InputStream in = result.getContent();
//This are the extra step which i dont know what it mean
//out = new ByteArrayOutputStream(1024);
//byte[] buffer = new byte1024;
//for (int read = in.read(buffer); read > 0; read = in.read(buffer))
//out.write(buffer,0,read);
//content = out.toString();
try {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(in);
NodeList list = document.getElementsByTagName( "E_NUMBER" );
Node node = list.item(0);
if (node != null)
node = node.getFirstChild();
if (node != null)
content = node.getNodeValue();
} catch (Exception e) {
importanttrace.addWarning("Error while closing accesor" + e.getMessage());
catch (LookupException e)
importanttrace.addWarning("Error While lookup" + e.getMessage());
//This exception is not to be catch at this step as there is no try step before this
//catch (IOException e)
//importanttrace.addWarning("Error" + e.getMessage());
finally
if(out!=null)
try{
out.close();
} catch (IOException e) {
importanttrace.addWarning("Error while closing system" + e.getMessage());
//7. close the accessor in order to free resources
if (accessor!=null) {
try{
accessor.close();
} catch (Exception e) {
importanttrace.addWarning("Error while closing accesor" + e.getMessage());
return content;
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