Calender utility in a java swing
anyone knows about any utility available in java swing calsses-to create a calender gui
There are a few libraries available in the net, but usually they aren't for free.
Probably you can study some example and write your own library.
Here is the interesting one:
http://www.developer.com/java/other/article.php/735291
Similar Messages
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How to create the digital clock in java swing application ?
I want to create the running digital clock in my java swing application. Can someone throw some light on this how to do this ? Or If someone has done it then can someone pl. paste the code ?
Thanks.hi prah_Rich,
I have created a digital clock you can use. You will most likely have to change some things to use it in another app although that shouldn't be too hard. A least it can give you some ideas on how to create one of your own. There are three classes.One that creates the numbers. a gui class and frame class.
cheers:)
Hex45
import java.awt.*;
import java.util.*;
import javax.swing.*;
import java.awt.geom.*;
public class DigitalClock extends Panel{
BasicStroke stroke = new BasicStroke(4,BasicStroke.CAP_ROUND,
BasicStroke.JOIN_BEVEL);
String hour1, hour2;
String minute1, minute2;
String second1, second2;
String mill1, mill2, mill3;
int hr1, hr2;
int min1, min2;
int sec1, sec2;
int mll1, mll2,mll3;
public void update(Graphics g){
paint(g);
public void paint(Graphics g){
Graphics2D g2D = (Graphics2D)g;
DigitalNumber num = new DigitalNumber(10,10,20,Color.cyan,Color.black);
GregorianCalendar c = new GregorianCalendar();
String hour = String.valueOf(c.get(Calendar.HOUR));
String minute = String.valueOf(c.get(Calendar.MINUTE));
String second = String.valueOf(c.get(Calendar.SECOND));
String milliSecond = String.valueOf(c.get(Calendar.MILLISECOND));
if(hour.length()==2){
hour1 = hour.substring(0,1);
hour2 = hour.substring(1,2);
}else{
hour1 = "0";
hour2 = hour.substring(0,1);
if(minute.length()==2){
minute1 = minute.substring(0,1);
minute2 = minute.substring(1,2);
}else{
minute1 = "0";
minute2 = minute.substring(0,1);
if(second.length()==2){
second1 = second.substring(0,1);
second2 = second.substring(1,2);
}else{
second1 = "0";
second2 = second.substring(0,1);
if(milliSecond.length()==3){
mill1 = milliSecond.substring(0,1);
mill2 = milliSecond.substring(1,2);
mill3 = milliSecond.substring(2,3);
}else if(milliSecond.length()==2){
mill1 = "0";
mill2 = milliSecond.substring(0,1);
mill3 = milliSecond.substring(1,2);
}else{
mill1 = "0";
mill2 = "0";
mill3 = milliSecond.substring(0,1);
hr1 = Integer.parseInt(hour1);
hr2 = Integer.parseInt(hour2);
min1 = Integer.parseInt(minute1);
min2 = Integer.parseInt(minute2);
sec1 = Integer.parseInt(second1);
sec2 = Integer.parseInt(second2);
mll1 = Integer.parseInt(mill1);
mll2 = Integer.parseInt(mill2);
g2D.setStroke(stroke);
g2D.setPaint(Color.cyan);
num.setSpacing(true,8);
num.setSpacing(true,8);
if(hr1==0&hr2==0){
num.drawNumber(1,g2D);
num.setLocation(40,10);
num.drawNumber(2,g2D);
else{
if(!(hr1 == 0)){
num.drawNumber(hr1,g2D);
num.setLocation(40,10);
num.drawNumber(hr2,g2D);
num.setLocation(70,10);
num.drawNumber(DigitalNumber.DOTS,g2D);
num.setLocation(100,10);
num.drawNumber(min1,g2D);
num.setLocation(130,10);
num.drawNumber(min2,g2D);
num.setLocation(160,10);
num.drawNumber(DigitalNumber.DOTS,g2D);
num.setLocation(190,10);
num.drawNumber(sec1,g2D);
num.setLocation(220,10);
num.drawNumber(sec2,g2D);
/*num.setLocation(250,10);
num.drawNumber(DigitalNumber.DOTS,g2D);
num.setLocation(280,10);
num.drawNumber(mll1,g2D);
num.setLocation(310,10);
num.drawNumber(mll2,g2D);
g2D.setPaint(Color.cyan);
if((c.get(Calendar.AM_PM))==Calendar.AM){
g2D.drawString("AM",260,20);
}else{
g2D.drawString("PM",260,20);
String dayOfweek = "";
switch(c.get(Calendar.DAY_OF_WEEK)){
case(Calendar.SUNDAY):
dayOfweek = "Sunday, ";
break;
case(Calendar.MONDAY):
dayOfweek = "Monday, ";
break;
case(Calendar.TUESDAY):
dayOfweek = "Tuesday, ";
break;
case(Calendar.WEDNESDAY):
dayOfweek = "Wednesday, ";
break;
case(Calendar.THURSDAY):
dayOfweek = "Thursday, ";
break;
case(Calendar.FRIDAY):
dayOfweek = "Friday, ";
break;
case(Calendar.SATURDAY):
dayOfweek = "Saturday, ";
break;
String month = "";
switch(c.get(Calendar.MONTH)){
case(Calendar.JANUARY):
month = "January ";
break;
case(Calendar.FEBRUARY):
month = "February ";
break;
case(Calendar.MARCH):
month = "March ";
break;
case(Calendar.APRIL):
month = "April ";
break;
case(Calendar.MAY):
month = "May ";
break;
case(Calendar.JUNE):
month = "June ";
break;
case(Calendar.JULY):
month = "July ";
break;
case(Calendar.AUGUST):
month = "August ";
break;
case(Calendar.SEPTEMBER):
month = "September ";
break;
case(Calendar.OCTOBER):
month = "October ";
break;
case(Calendar.NOVEMBER):
month = "November ";
break;
case(Calendar.DECEMBER):
month = "December ";
break;
int day = c.get(Calendar.DAY_OF_MONTH);
int year = c.get(Calendar.YEAR);
Font font = new Font("serif",Font.PLAIN,24);
g2D.setFont(font);
g2D.drawString(dayOfweek+month+day+", "+year,10,80);
public static void main(String args[]){
AppFrame aframe = new AppFrame("Digital Clock");
Container cpane = aframe.getContentPane();
final DigitalClock dc = new DigitalClock();
dc.setBackground(Color.black);
cpane.add(dc,BorderLayout.CENTER);
aframe.setSize(310,120);
aframe.setVisible(true);
class Task extends TimerTask {
public void run() {
dc.repaint();
java.util.Timer timer = new java.util.Timer();
timer.schedule(new Task(),0L,250L);
class DigitalNumber {
private float x=0;
private float y=0;
private float size=5;
private int number;
private Shape s;
private float space = 0;
public static final int DOTS = 10;
private Color on,off;
DigitalNumber(){
this(0f,0f,5f,Color.cyan,Color.black);
DigitalNumber(float x,float y, float size,Color on,Color off){
this.x = x;
this.y = y;
this.size = size;
this.on = on;
this.off = off;
public void drawNumber(int number,Graphics2D g){
int flag = 0;
switch(number){
case(0):
flag = 125;
break;
case(1):
flag = 96;
break;
case(2):
flag = 55;
break;
case(3):
flag = 103;
break;
case(4):
flag = 106;
break;
case(5):
flag = 79;
break;
case(6):
flag = 94;
break;
case(7):
flag = 97;
break;
case(8):
flag = 127;
break;
case(9):
flag = 107;
break;
case(DOTS):
GeneralPath path = new GeneralPath();
path.moveTo(x+(size/2),y+(size/2)-1);
path.lineTo(x+(size/2),y+(size/2)+1);
path.moveTo(x+(size/2),y+(size/2)+size-1);
path.lineTo(x+(size/2),y+(size/2)+size+1);
g.setPaint(on);
g.draw(path);
return;
//Top
if((flag & 1) == 1){
g.setPaint(on);
}else{
g.setPaint(off);
GeneralPath Top = new GeneralPath();
Top.moveTo(x + space, y);
Top.lineTo(x + size - space, y);
g.draw(Top);
//Middle
if((flag & 2) == 2){
g.setPaint(on);
}else{
g.setPaint(off);
GeneralPath Middle = new GeneralPath();
Middle.moveTo(x + space, y + size);
Middle.lineTo(x + size - space,y + size);
g.draw(Middle);
//Bottom
if((flag & 4) == 4){
g.setPaint(on);
}else{
g.setPaint(off);
GeneralPath Bottom = new GeneralPath();
Bottom.moveTo(x + space, y + (size * 2));
Bottom.lineTo(x + size - space, y + (size * 2));
g.draw(Bottom);
//TopLeft
if((flag & 8) == 8){
g.setPaint(on);
}else{
g.setPaint(off);
GeneralPath TopLeft = new GeneralPath();
TopLeft.moveTo(x, y + space);
TopLeft.lineTo(x, y + size - space);
g.draw(TopLeft);
//BottomLeft
if((flag & 16) == 16){
g.setPaint(on);
}else{
g.setPaint(off);
GeneralPath BottomLeft = new GeneralPath();
BottomLeft.moveTo(x, y + size + space);
BottomLeft.lineTo(x, y + (size * 2) - space);
g.draw(BottomLeft);
//TopRight
if((flag & 32) == 32){
g.setPaint(on);
}else{
g.setPaint(off);
GeneralPath TopRight = new GeneralPath();
TopRight.moveTo(x + size, y + space);
TopRight.lineTo(x + size, y + size - space);
g.draw(TopRight);
//BottomRight
if((flag & 64) == 64){
g.setPaint(on);
}else{
g.setPaint(off);
GeneralPath BottomRight = new GeneralPath();
BottomRight.moveTo(x + size, y + size + space);
BottomRight.lineTo(x + size, y + (size * 2) - space);
g.draw(BottomRight);
public void setSpacing(boolean spacingOn){
if(spacingOn == false){
space = 0;
else{
this.setSpacing(spacingOn,5f);
public void setSpacing(boolean spacingOn,float gap){
if(gap<2){
gap = 2;
if(spacingOn == true){
space = size/gap;
public void setLocation(float x,float y){
this.x = x;
this.y = y;
public void setSize(float size){
this.size = size;
class AppFrame extends JFrame{
AppFrame(){
this("Demo Frame");
AppFrame(String title){
super(title);
setSize(500,500);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
} -
How to Update existing XML File Using Java Swing
Hi,
I am reading XML file and getting keywords into JList. When i add some keywords into JList through textfield and remove keywords JList, then after click on save button it should update xml file. How can i do it ?
Please provide me some code tips for updating xml file
This is the code that i am using for reading XML File:
import javax.swing.*;
import java.awt.event.*;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import java.io.IOException;
import java.util.*;
import java.text.Collator;
import java.util.regex.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import com.cloudgarden.layout.AnchorConstraint;
import com.cloudgarden.layout.AnchorLayout;
public class getKeywords extends JFrame implements ActionListener
static JPanel p;
static JLabel lbl;
static JButton btnSave,btnAdd,btnRemove;
static String path;
static Vector v;
static JList lstCur;
static JTextField txtKey;
Document dom;
static image imgval;
NodeList nodelstImage;
static AnchorLayout anchorLay;
private DefaultListModel lstCurModel;
public getKeywords()
super("Current Keywords");
v=new Vector();
p=new JPanel();
txtKey=new JTextField(10);
btnAdd=new JButton("Add");
btnRemove=new JButton("Remove");
btnSave=new JButton("Save");
lbl=new JLabel("Current Keywords");
lstCurModel=new DefaultListModel();
lstCur=new JList();
JScrollPane scr=new JScrollPane(lstCur);
runExample();
lstCur.setModel(lstCurModel);
p.add(lbl);
p.add(scr);
p.add(txtKey);
p.add(btnAdd);
p.add(btnRemove);
p.add(btnSave);
add(p);
btnAdd.addActionListener(this);
btnRemove.addActionListener(this);
btnSave.addActionListener(this);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
public static void main(String arg[])
getKeywords g=new getKeywords();
g.resize(250,400);
g.setVisible(true);
public void actionPerformed(ActionEvent ae)
if(ae.getSource()==btnAdd)
lstCurModel.addElement(txtKey.getText());
if(ae.getSource()==btnRemove)
lstCurModel.remove(lstCur.getSelectedIndex());
if(ae.getSource()==btnSave)
//Code to Write
public void runExample()
//Parse the XML file and get the DOM object
ParseXMLFile();
//Get the Detail of the Image Document
parseImageDocument();
//Get the Detail of the LML Document
//parseLMLDocument();
//System.out.println(lmlval.Title);
public void ParseXMLFile()
//Get the Factory
DocumentBuilderFactory builderFac = DocumentBuilderFactory.newInstance();
try
//Using factory get an instance of the Document Builder
DocumentBuilder builder = builderFac.newDocumentBuilder();
//parse using builder to get DOM representation of the XML file
dom = builder.parse("LML.xml");
catch(ParserConfigurationException pce)
pce.printStackTrace();
catch(SAXException sax)
sax.printStackTrace();
catch(IOException ioex)
ioex.printStackTrace();
public void parseImageDocument()
//Get the root element
Element docImgEle = dom.getDocumentElement();
//Get a nodelist for <Image> Element
nodelstImage = docImgEle.getElementsByTagName("Image");
if(nodelstImage != null && nodelstImage.getLength() > 0)
for(int i = 0; i < nodelstImage.getLength(); i++)
//Get the LML elements
Element el = (Element)nodelstImage.item(i);
//Get the LML object
getImage myImgval = new getImage();
imgval = myImgval.getimage(el);
v.addElement(new String(imgval.Thumb));
String[] x = Pattern.compile(",").split(imgval.Keys);
for (int s=0; s<x.length; s++)
lstCurModel.addElement(x[s].trim());
//System.out.println(x[s].trim());
} Thanks
NitinYou should update your DOM document to represent the changes that you want made.
Then, using the Transformation API you simply transform your document onto a stream representing your file. Something like this:
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
// TODO - set indentation amount!
Source source = new DOMSource(dom);
Result result = new StreamResult(file);
transformer.transform(source, result);Hope this helps. -
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();
} -
Hi Everyone,
I am looking forward for some guidance from all you guys here.
I have been assigned the work of upgrading Java Swing project. The upgrading also involved some improvements in look and feel of the tool.
Currently the tool looks very simple/basic and needs some good over-haul.
As basically I am a J2EE guy, I dont have much idea about the Swing Open-source API's that I can utilize for the same.
If anyone has good idea about the API's that can be utilized or suggestions for the improvement of the tool look wise then please let me know.
Thanks,
Gauravuser7668872 wrote:
..I have done some research and I have come across.. That is an interesting term to describe the 2 PLAFs I mentioned on this very thread. O_o
..some themes like metal(being used currently), Windows and nimbus.
I implemented all these themes one by one in the project, but not sure if I can use any of these themes and extend them in some ways to look like the mock-up.
The Synth Look and Feel.
"Creating a custom look and feel, or modifying an existing one, can be a daunting task. The <a href="http://download.oracle.com/javase/7/docs/api/javax/swing/plaf/synth/package-summary.html">javax.swing.plaf.synth</a> package can be used to create a custom look and feel with much less effort. You can create a Synth look and feel either programatically or through the use of an external XML file. The discussion below is devoted to the creation of a Synth look and feel using an external XML file. Creating a Synth L&F programatically is discussed in the API documentation."
There are also a number of existing custom PLAFs. E.G. See this excellent summary at SO on the thread Look and feel in java.
What will you suggest me :)<ul>
<li>When in doubt, try it.
<li>Be good to your mum.
</ul> -
Hi all,
can any one tell me the best date picker for my swing application, it should be very simple and work fast for my applicationHi,
Here is one more DatePicker, the usage is mentioned in the main()
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.EventObject;
import java.util.GregorianCalendar;
import java.util.LinkedList;
import javax.swing.*;
import javax.swing.border.BevelBorder;
import javax.swing.border.LineBorder;
import javax.swing.event.CellEditorListener;
import javax.swing.event.ChangeEvent;
import javax.swing.event.EventListenerList;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
* This is a simple Calendar component written in single class. This is a
* JInternalFrame. Instantiate with public constructor and add AbstractAction
* using addAction() method and implement action performed method the,
* ActionEvent source contains the GregorianCalendar of selected Date on the
* component. Example usage is in main()
class JCalendar extends JInternalFrame {
//Define the Button ActionCommands
private final static String incMonth = "INC_MONTH";
private final static String incYear = "INC_YEAR";
private final static String incDecade = "INC_DECADE";
private final static String decMonth = "DEC_MONTH";
private final static String decYear = "DEC_YEAR";
private final static String decDecade = "DEC_DECADE";
private AbstractTableModel tableModel;
private JTable table;
private JScrollPane scrollPane;
private String[] monthNames = { "JAN", "FEB", "MAR", "APR", "MAY", "JUN",
"JUL", "AUG", "SEP", "OCT", "NOV", "DEC" };
private String[] columnNames = { "SUN", "MON", "TUE", "WED", "THU", "FRI",
"SAT" };
private volatile GregorianCalendar calendar = new GregorianCalendar();
private volatile int selectedYear = calendar.get(Calendar.YEAR);
private volatile int selectedMonth = calendar.get(Calendar.MONTH);
private volatile int selectedDate = calendar.get(Calendar.DATE);
private LinkedList<Action> actionListenerList = new LinkedList<Action>();
private JLabel status = new JLabel();
public JCalendar() {
super("", false, false, false, false);
buildMonthYearGUI();
buildGUI();
getContentPane().add(status, BorderLayout.SOUTH);
// setDates();
((javax.swing.plaf.basic.BasicInternalFrameUI) getUI())
.setNorthPane(null);
setBorder(new LineBorder(Color.BLACK));
setSize(230, 140);
private GregorianCalendar getSelectedDate() {
GregorianCalendar finalCalendar = new GregorianCalendar();
finalCalendar.set(Calendar.DATE, calendar.get(Calendar.DATE));
finalCalendar.set(Calendar.MONTH, calendar.get(Calendar.MONTH));
finalCalendar.set(Calendar.YEAR, calendar.get(Calendar.YEAR));
return finalCalendar;
public void addAction(Action action) {
actionListenerList.add(action);
protected void buildMonthYearGUI() {
final JLabel label = new JLabel(monthNames[selectedMonth] + " "
+ selectedYear);
label.setAlignmentX(JLabel.CENTER);
label.setForeground(Color.DARK_GRAY);
label.setBorder(new LineBorder(Color.DARK_GRAY));
class Convenience {
public JHyperLink buildLink(String label, String actionCmd,
Action listener) {
JHyperLink link = new JHyperLink();
link.setText(label);
listener.putValue(Action.ACTION_COMMAND_KEY, actionCmd);
link.addAction(listener);
link.setBorder(new LineBorder(Color.DARK_GRAY));
return link;
}// end convenience
Convenience convenience = new Convenience();
class IncDecAction extends AbstractAction {
private String getLabelText() {
return monthNames[selectedMonth] + " " + selectedYear;
public void actionPerformed(ActionEvent e) {
String actionCmd = e.getActionCommand().trim();
if(actionCmd.equalsIgnoreCase(decDecade)){
selectedYear = selectedYear-10;
label.setText(getLabelText());
}else if(actionCmd.equalsIgnoreCase(incDecade)){
selectedYear = selectedYear +10;
label.setText(getLabelText());
}else if (actionCmd.equalsIgnoreCase(decYear)) {
selectedYear--;
calendar.set(Calendar.YEAR, selectedYear);
label.setText(getLabelText());
} else if (actionCmd.equalsIgnoreCase(incYear)) {
selectedYear++;
calendar.set(Calendar.YEAR, selectedYear);
label.setText(getLabelText());
} else if (actionCmd.equalsIgnoreCase(decMonth)) {
if (selectedMonth == Calendar.JANUARY) {
selectedMonth = Calendar.DECEMBER;
selectedYear--;
calendar.set(Calendar.YEAR, selectedYear);
} else {
selectedMonth--;
calendar.set(Calendar.MONTH, selectedMonth);
label.setText(getLabelText());
} else if (actionCmd.equalsIgnoreCase(incMonth)) {
if (selectedMonth == Calendar.DECEMBER) {
selectedMonth = Calendar.JANUARY;
selectedYear++;
calendar.set(Calendar.YEAR, selectedYear);
} else {
selectedMonth++;
calendar.set(Calendar.MONTH, selectedMonth);
label.setText(getLabelText());
if (tableModel != null) {
tableModel.fireTableStructureChanged();
tableModel.fireTableDataChanged();
//AbstractAction listener = new IncDecAction();
JHyperLink decDecButton = convenience.buildLink("<<<", decDecade, new IncDecAction());
JHyperLink incDecButton = convenience.buildLink(">>>", incDecade, new IncDecAction());
JHyperLink decYearButton = convenience.buildLink(" << ", decYear, new IncDecAction());
JHyperLink incYearButton = convenience.buildLink(" >> ", incYear, new IncDecAction());
JHyperLink decMonthButton = convenience.buildLink(" < ", decMonth, new IncDecAction());
JHyperLink incMonthButton = convenience.buildLink(" > ", incMonth, new IncDecAction());
JPanel monthYearPane = new JPanel();
monthYearPane.setLayout(new GridBagLayout());
GridBagConstraints constraints = new GridBagConstraints();
constraints.insets = new Insets(2,2,2,2);
constraints.gridx = 0;
monthYearPane.add(decDecButton, constraints);
constraints.gridx = 1;
monthYearPane.add(decYearButton, constraints);
constraints.gridx = 2;
monthYearPane.add(decMonthButton, constraints);
constraints.gridx = 3;
constraints.weightx = 1;
monthYearPane.add(label, constraints);
constraints.gridx = 4;
constraints.weightx = 0;
monthYearPane.add(incMonthButton, constraints);
constraints.gridx = 5;
monthYearPane.add(incYearButton, constraints);
constraints.gridx = 6;
monthYearPane.add(incDecButton, constraints);
monthYearPane.setBorder(new LineBorder(Color.GRAY));
getContentPane().add(monthYearPane, BorderLayout.NORTH);
protected void buildGUI() {
tableModel = new AbstractTableModel() {
public boolean isCellEditable(int row, int column) {
return true;
public Class getColumnClass(int columnIndex) {
return String.class;
@Override
public String getColumnName(int columnIndex) {
return columnNames[columnIndex];
public int getRowCount() {
return calendar.getActualMaximum(Calendar.WEEK_OF_MONTH);
// throw new UnsupportedOperationException("Not supported
// yet.");
public int getColumnCount() {
return 7;
// throw new UnsupportedOperationException("Not supported
// yet.");
public Object getValueAt(int rowIndex, int columnIndex) {
//System.out.println("Get Value method called");
int day_of_week = columnIndex + 1;
int week_of_month = rowIndex + 1;
GregorianCalendar localCalendar = new GregorianCalendar();
localCalendar.set(Calendar.MONTH, selectedMonth);
localCalendar.set(Calendar.YEAR, selectedYear);
int current_month = localCalendar.get(Calendar.MONTH);
localCalendar.set(Calendar.WEEK_OF_MONTH, week_of_month);
localCalendar.set(Calendar.DAY_OF_WEEK, day_of_week);
if (current_month != localCalendar.get(Calendar.MONTH))
return null;
return localCalendar.get(Calendar.DATE);
// throw new UnsupportedOperationException("Not supported
// yet.");
class JHyperLinkRenderer extends JHyperLink implements TableCellRenderer, TableCellEditor
protected String plainText = "";
public JHyperLinkRenderer() {
private void setDate() {
calendar.set(Calendar.DATE, Integer.parseInt(plainText));
public void setText(String text) {
plainText = text;
super.setText("<html><u>" + text + "</u></html>");
if(plainText != null && !plainText.equalsIgnoreCase("")){
this.setToolTipText(new Integer(selectedMonth+1).toString()+"/"+plainText+"/"+new Integer(selectedYear).toString());
protected void fireMouseEntered(MouseEvent me) {
fireActionEvent();
protected void fireMouseExited(MouseEvent me) {
//This is overiden to change the behavior
protected void fireActionEvent() {
* The actionListenerList variable is defined at Global
* JCalendar Level
for (Action l : actionListenerList) {
Object source = null;
if (plainText != null && !plainText.equalsIgnoreCase("")) {
// calendar.set(Calendar.DATE, Integer.parseInt(plainText));
setDate();
source = getSelectedDate();
} else {
source = this;
ActionEvent e = new ActionEvent(source,
ActionEvent.ACTION_PERFORMED, (String) l
.getValue(Action.ACTION_COMMAND_KEY));
l.actionPerformed(e);
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus,
int row, int column) {
value = tableModel.getValueAt(row, column);
setText("");
setBorder(null);
setOpaque(true);
if (column == 0 || column == 6) {
setBackground(Color.LIGHT_GRAY);
} else {
setBackground(table.getBackground());
if (value != null) {
setText(value.toString());
this.setHorizontalAlignment(JLabel.CENTER);
// this.setBorder(border);
this.setForeground(Color.DARK_GRAY);
// this.setBackground(Color.RED);
if (isSelected) {
setForeground(Color.BLUE);
// setBorder(new LineBorder(Color.BLUE));
BevelBorder border = new BevelBorder(BevelBorder.RAISED);
setBorder(border);
if(value.toString().equalsIgnoreCase(new Integer(selectedDate).toString())) {
setBackground(Color.GREEN);
BevelBorder border = new BevelBorder(BevelBorder.RAISED);
return this;
//Cell Editor Implementations
public Component getTableCellEditorComponent(JTable table,
Object value, boolean isSelected, int row, int column) {
// setText("");
if (value != null) {
setText(value.toString());
this.setHorizontalAlignment(JLabel.CENTER);
setForeground(Color.BLUE);
BevelBorder border = new BevelBorder(BevelBorder.RAISED);
setBorder(border);
} else {
setText("");
return this;
protected EventListenerList listenerList = new EventListenerList();
protected ChangeEvent changeEvent = new ChangeEvent(this);
public void addCellEditorListener(CellEditorListener listener) {
listenerList.add(CellEditorListener.class, listener);
public void removeCellEditorListener(CellEditorListener listener) {
listenerList.remove(CellEditorListener.class, listener);
protected void fireEditingStopped() {
CellEditorListener listener;
Object[] listeners = listenerList.getListenerList();
for (int i = 0; i < listeners.length; i++) {
if (listeners[i] == CellEditorListener.class) {
listener = (CellEditorListener) listeners[i + 1];
listener.editingStopped(changeEvent);
protected void fireEditingCanceled() {
CellEditorListener listener;
Object[] listeners = listenerList.getListenerList();
for (int i = 0; i < listeners.length; i++) {
if (listeners[i] == CellEditorListener.class) {
listener = (CellEditorListener) listeners[i + 1];
listener.editingCanceled(changeEvent);
public void cancelCellEditing() {
fireEditingCanceled();
public boolean stopCellEditing() {
fireEditingStopped();
return true;
public boolean isCellEditable(EventObject event) {
boolean flag = false;
if(event instanceof MouseEvent) {
MouseEvent evt = (MouseEvent)event;
if(evt.getClickCount() > 1) flag = true;
return flag;
public boolean shouldSelectCell(EventObject event) {
return true;
public Object getCellEditorValue() {
//return null;
return this.getText();
JHyperLinkRenderer editorRenderer = new JHyperLinkRenderer();
table = new JTable(tableModel);
// Set the CellRenderer
table.setDefaultRenderer(String.class, editorRenderer);
table.setDefaultEditor(String.class, editorRenderer);
table.getTableHeader().setReorderingAllowed(false);
table.getColumnModel().setColumnMargin(5);
table.putClientProperty("terminateEditOnFocusLost",Boolean.TRUE);
table.setRequestFocusEnabled(false);
table.setRowSelectionAllowed(false);
// table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
// table.setCellSelectionEnabled(true);
// table.setShowGrid(false);
scrollPane = new JScrollPane(table);
scrollPane.setBorder(new LineBorder(Color.GRAY));
getContentPane().add(scrollPane, BorderLayout.CENTER);
// Local Inner JHyperLink Label class
class JHyperLink extends JLabel {
//This should be Strictly private
private final LinkedList<Action> actionListenerList = new LinkedList<Action>();
public JHyperLink() {
super("");
addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent me) {
fireMouseEntered(me);
public void mouseExited(MouseEvent me) {
fireMouseExited(me);
// status.removeAll();
public void mouseClicked(MouseEvent me) {
fireActionEvent();
//setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
protected void fireMouseEntered(MouseEvent me) {
protected void fireMouseExited(MouseEvent me) {
public void addAction(Action l) {
if (!actionListenerList.contains(l)) {
actionListenerList.add(l);
public void removeAction(Action l) {
actionListenerList.remove(l);
protected void fireActionEvent() {
for (Action l : actionListenerList) {
Object source = null;
source = this;
ActionEvent e = new ActionEvent(source,
ActionEvent.ACTION_PERFORMED, (String) l
.getValue(Action.ACTION_COMMAND_KEY));
l.actionPerformed(e);
public static void main(String[] args) {
final String calCmd = "CALENDAR_ACTION";
final JCalendar calendar = new JCalendar();
calendar.setVisible(true);
calendar.setLocation(75, 75);
AbstractAction calendarAction = new AbstractAction() {
public void actionPerformed(ActionEvent e) {
if (e.getActionCommand().equalsIgnoreCase(calCmd)) {
if (e.getSource() != null
&& e.getSource() instanceof GregorianCalendar) {
GregorianCalendar selCal = (GregorianCalendar) e
.getSource();
System.out.println("The Selected Date is :"
+ selCal.get(Calendar.MONTH) + "/"
+ selCal.get(Calendar.DATE) + "/"
+ selCal.get(Calendar.YEAR));
calendar.dispose();
calendarAction.putValue(Action.ACTION_COMMAND_KEY, calCmd);
calendar.addAction(calendarAction);
// calendar.pack();
JFrame frame = new JFrame();
JDesktopPane desk = new JDesktopPane();
frame.setContentPane(desk);
desk.add(calendar);
frame.setLocation(50, 50);
frame.setSize(400, 400);
frame.setVisible(true);
Cheers
Ram -
What is difference between C# Gzip and Java swing GZIPOutputStream?
Hi All,
I have a Java swing tool where i can compress file inputs and we have C# tool.
I am using GZIPOutputStream to compress the stream .
I found the difference between C# and Java Gzip compression while a compressing a file (temp.gif ) -
After Compression of temp.gif file in C# - compressed file size increased
while in java i found a 2% percentage of compression of data.
Could you please tell me , can i achieve same output in Java as compared to C# using GZIPOutputStream ?
Thank a lot in advance.797957 wrote:
Does java provides a better compression than C#?no idea, i don't do c# programming. and, your question is most likely really: "does java default to a higher compression level than c#".
Btw what is faster compression vs. better compression?meaning, does the code spend more time/effort trying to compress the data (slower but better compression) or less time/effort trying to compress the data (faster but worse compression). most compression algorithms allow you to control this tradeoff depending on whether you care more about cpu time or disk/memory space. -
PL/SQL and Java Swing interface
Everybody in this forum knows that Oracle is the best database around
with many functionalities, stability, performance, etc. We also know
that PL/SQL is a great language to manipulate information directly
in the database with many built in functions, OOP capability,
transaction control, among other features. Today an application that
manipulates information, which needs user interface, requires components
to be developed using different technologies and normally running in
different servers or machines. For example, the interface is done using
a dynamic HTML generator like JSP, PHP, PL/SQL Web Toolkit, etc.
This page is executed in an application server like Oracle iAS or
Tomcat, just to name two, which in turn access a database like Oracle to
build the HTML. Also rich clients like Java applets require an intermediate
server to access the database (through servlets for example) although
it is possible to access the database directly but with security issues.
Another problem with this is that complexity increases a lot, many
technologies, skills and places to maintain code which leads to a greater
failure probability. Also, an application is constantly evolving, new
calculations are added, new tables, changed columns. If you have an
application with product code for example and you need to increase its
size, you need to change it in the database, search for all occurrences
of it in the middle-tier code and perhaps adjust interfaces. Normally
there is no direct dependency among the tier components. On another
issue, many application interfaces today are based on HTML which doesn't
have interactive capabilities like rich-client interfaces. Although it
is possible to simulate many GUI widgets with JavaScript and DHTML, it is
far from the interactive level we can accomplish in rich clients like
Java Swing, Flash MX, Win32, etc. HTML is also a "tag-based" language
originally created to publish documents so even small pages require
many bytes to be transmitted, far beyond of what we see on the screen.
Even in fast networks you have a delay time to wait the page to be
loaded. Another issue, the database is in general the central location
for all kinds of data. Most applications relies on it for security,
transaction and availability. My proposal is to use Oracle as the
central location for interface, processing and data. With this approach
we can create not only the data manipulation procedures in the database,
but procedures that also control and manage user interfaces. Having
a Oracle database as the central location for all components has many
advantages:
- Unique point of maintenance, backup and restore
- Integrated database security
- One language for everything, PL/SQL or Java (even both if desired)
- Inherited database cache, transaction and processing optimizations
- Direct access to the database dictionary
- Application runs on Oracle which has support for many platforms.
- Transparent use of parallel processing, clusters and future
background technologies
Regarding the interface, I already created a Java applet renderer
which receives instructions from the database on how to create GUI
objects and how to respond to events. The applet is only 8kb and can
render any Swing or AWT object/event. The communication is done
through HTTP or HTTPS using Oracles's MOD_PLSQL included in the Apache
HTTP server which comes with the database or application server (iAS).
I am also creating a database framework and APIs in PL/SQL to
create and manipulate the client interface. The applet startup is
very fast because it is very small, you don't need to download large
classes with the client interface. Execution is done "on-demand"
according to instructions received from the database. The instructions
are very optimized in terms of network bandwidth and based on preliminary
tests it can be up to 1/10 of a similar HTML screen. Less network usage
means faster response and means that even low speed connections will
have a good performance (a future development can be to use this in
wireless devices like PDAs e even cell phones, just an idea for now).
The applet can also be executed standalone by using Java Web Start.
With this approach no business code, except the interface, is executed
on the client. This means that alterations in the application are
dynamically reflected in the client, no need to "re-download" the
application. Events are transmitted when required only so network
usage is minimized. It is also possible to establish triggering
events to further reduce network usage. Since the protocol used is
HTTP (which is stateless), the database framework I am creating will
be responsible to maintain the state of connections, variables, locks
and session information, so the developer don't need to worry about it.
The framework will have many layers, from communication up to
application so there will be pre-built functions to handle queries,
pagination, lock, mail, log, etc. The final objective is to have a
rich client application integrated into the database with minimum
programming and maintenance requirements, not forgetting customization
capabilities. Below is a very small example of what can de done. A
desktop with two windows, each window with two fields, a button with an
image to switch the values, and events to convert the typed text when
leaving the field or double-clicking it. The "leave" event also has an
optimization to only be triggered when the text changes. I am still
developing the framework and adjusting the renderer but I think that all
technical barriers were transposed by now. The framework is still in
the early stages, my guess is that only 5% is done so far. As a future
development even an IDE can be created so we have a graphical environment
do develop applications. I am willing to share this with the PL/SQL
community and listen to ideas and comments.
Example:
create or replace procedure demo1 (
jre_version in varchar2 := '1.4.2_01',
debug_info in varchar2 := 'false',
compress_buffer in varchar2 := 'false',
optimize_buffer in varchar2 := 'true'
) as
begin
interface.initialize('demo1_init','JGR Demo 1',jre_version,debug_info,compress_buffer,optimize_buffer);
end;
create or replace procedure demo1_init as
begin
toolkit.initialize;
toolkit.create_icon('icon',interface.global_root_url||'img/switch.gif');
toolkit.create_internal_frame('frame1','Frame 1',50,50,300,136);
toolkit.create_label('frame1label1','frame1',10,10,50,20,'Field 1');
toolkit.create_label('frame1label2','frame1',10,40,50,20,'Field 2');
toolkit.create_text_field('frame1field1','frame1',50,10,230,20,'Field 1','Field 1',focus_event=>true,mouse_event=>true);
toolkit.create_text_field('frame1field2','frame1',50,40,230,20,'Field 2','Field 2',focus_event=>true,mouse_event=>true);
toolkit.set_text_field_event('frame1field1',toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,'FIELD 1','false');
toolkit.set_text_field_event('frame1field2',toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,'FIELD 2','false');
toolkit.set_text_field_event('frame1field1',toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,'field 1','false');
toolkit.set_text_field_event('frame1field2',toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,'field 2','false');
toolkit.create_button('button1','frame1',10,70,100,25,'Switch','Switch the values of "Field 1" and "Field 2"','S','icon');
toolkit.set_button_event('button1',toolkit.action_performed_event,'demo1_switch_fields(''frame1field1'',''frame1field2'')','frame1field1:'||toolkit.get_text_method||',frame1field2:'||toolkit.get_text_method);
toolkit.create_internal_frame('frame2','Frame 2',100,100,300,136);
toolkit.create_label('frame2label1','frame2',10,10,50,20,'Field 1');
toolkit.create_label('frame2label2','frame2',10,40,50,20,'Field 2');
toolkit.create_text_field('frame2field1','frame2',50,10,230,20,'Field 1','Field 1',focus_event=>true,mouse_event=>true);
toolkit.create_text_field('frame2field2','frame2',50,40,230,20,'Field 2','Field 2',focus_event=>true,mouse_event=>true);
toolkit.set_text_field_event('frame2field1',toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,'FIELD 1','false');
toolkit.set_text_field_event('frame2field2',toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,'FIELD 2','false');
toolkit.set_text_field_event('frame2field1',toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,'field 1','false');
toolkit.set_text_field_event('frame2field2',toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,'field 2','false');
toolkit.create_button('button2','frame2',10,70,100,25,'Switch','Switch the values of "Field 1" and "Field 2"','S','icon');
toolkit.set_button_event('button2',toolkit.action_performed_event,'demo1_switch_fields(''frame2field1'',''frame2field2'')','frame2field1:'||toolkit.get_text_method||',frame2field2:'||toolkit.get_text_method);
end;
create or replace procedure demo1_set_upper as
begin
toolkit.set_string_method(interface.global_object_name,toolkit.set_text_method,upper(interface.array_event_value(1)));
toolkit.set_text_field_event(interface.global_object_name,toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,upper(interface.array_event_value(1)),'false');
end;
create or replace procedure demo1_set_lower as
begin
toolkit.set_string_method(interface.global_object_name,toolkit.set_text_method,lower(interface.array_event_value(1)));
toolkit.set_text_field_event(interface.global_object_name,toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,lower(interface.array_event_value(1)),'false');
end;
create or replace procedure demo1_switch_fields (
field1 in varchar2,
field2 in varchar2
) as
begin
toolkit.set_string_method(field1,toolkit.set_text_method,interface.array_event_value(2));
toolkit.set_string_method(field2,toolkit.set_text_method,interface.array_event_value(1));
toolkit.set_text_field_event(field1,toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,upper(interface.array_event_value(2)),'false');
toolkit.set_text_field_event(field2,toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,upper(interface.array_event_value(1)),'false');
toolkit.set_text_field_event(field1,toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,lower(interface.array_event_value(2)),'false');
toolkit.set_text_field_event(field2,toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,lower(interface.array_event_value(1)),'false');
end;Is it sound like Oracle Portal?
But you want to save a layer 9iAS.
Basically, that was the WebDB.(Oracle changed the name to Portal when version 3.0)
Over all, I agree with you.
>>Having a Oracle database as the central location for all components has many
>>advantages:
>>
>>- Unique point of maintenance, backup and restore
>>- Integrated database security
>>- One language for everything, PL/SQL or Java (even both if desired)
>>- Inherited database cache, transaction and processing optimizations
>>- Direct access to the database dictionary
>>- Application runs on Oracle which has support for many platforms.
>>- Transparent use of parallel processing, clusters and future
>>background technologies
I would like to build 'ZOPE' inside Oracle DB as a back-end
Using Flash MX as front-end.
Thomas Ku. -
Problem with java swing button and loop
Problem with java swing button and loop
I�m using VAJ 4.0. and I�m doing normal GUI application. I have next problem.
I have in the same class two jswing buttons named start (ivjGStart) and stop (ivjGStop) and private static int field named Status where initial value is 0. This buttons should work something like this:
When I click on start button it must do next:
Start button must set disenabled and Stop button must set enabled and selected. Field status is set to 1, because this is a condition in next procedure in some loop. And then procedure named IzvajajNeprekinjeno() is invoked.
And when I click on stop button it must do next:
Start button must set enabled and selected and Stop button must set disenabled.
Field status is set to 0.
This works everything fine without loop �do .. while� inside the procedure IzvajajNeprekinjeno(). But when used this loop the start button all the time stay (like) pressed. And this means that a can�t stop my loop.
There is java code, so you can get better picture:
/** start button */
public void gStart_ActionEvents() {
try {
ivjGStart.setEnabled(false);
ivjGStop.setEnabled(true);
ivjGStop.setSelected(true);
getJTextPane1().setText("Program is running ...");
Status = 1;
} catch (Exception e) {}
/** stop button */
public void gStop_ActionEvents() {
try {
ivjGStart.setEnabled(true);
ivjGStart.setSelected(true);
ivjGStop.setEnabled(false);
getJTextPane1().setText("Program is NOT running ...");
Status = 0;
} catch (Exception e) {
/** procedure IzvajajNeprekinjeno() */
public void IzvajajNeprekinjeno() { //RunLoop
try {
int zamik = 2000; //delay
do {
Thread.sleep(zamik);
PreberiDat(); //procedure
} while (Status == 1);
} catch (Exception e) {
So, I'm asking what I have to do, that start button will not all the time stay pressed? Or some other aspect of solving this problem.
Any help will be appreciated.
Best regards,
TomiThis is a multi thread problem. When you start the gui, it is running in one thread. Lets call that GUI_Thread so we know what we are talking about.
Since java is task-based this will happen if you do like this:
1. Button "Start" is pressed. Thread running: GUI_Thread
2. Event gStart_ActionEvents() called. Thread running: GUI_Thread
3. Method IzvajajNeprekinjeno() called. Thread running: GUI_Thread
4. Sleep in method IzvajajNeprekinjeno() on thread GUI_Thread
5. Call PreberiDat(). Thread running: GUI_Thread
6. Check status. If == 1, go tho 4. Thread running: GUI_Thread.
Since the method IzvajajNeprekinjeno() (what does that mean?) and the GUI is running in the same thread and the event that the Start button has thrown isn't done yet, the program will go on in the IzvajajNeprekinjeno() method forever and never let you press the Stop-button.
What you have to do is do put either the GUI in a thread of its own or start a new thread that will do the task of the IzvajajNeprekinjeno() method.
http://java.sun.com/docs/books/tutorial/uiswing/index.html
This tutorial explains how to build a multi threaded gui.
/Lime -
Certificate support in Java Swing application
Hi There,
I am new to this Certificate thing and running into issues! Would appreciate for all the help and please ignore for any stupid questions.
Here is my scenario.
1. I do have a client server application and client is a java swing application which connects to a Server application (Using Jetty 4.2.22 as embedded server)
2. Initially, it had a self signed certificate but goal is to support third party certificate (i.e import in the server and then show warning to the client during login)
If somebody has already done this or point me to some example (using Jetty APIs) that would be great help. If not, here is what I am trying to do and some questions.
1. I tried to get some free SSL certificate from the web and imported into the server's KeyStore.
If I do a list from the server using Keystore, this is what it looks like
keytool -list -keystore /tmp/keystore -storepass genview
Keystore type: JKS
Keystore provider: SUN
Your keystore contains 2 entries
self, Dec 3, 2008, PrivateKeyEntry,
Certificate fingerprint (MD5): 0D:58:E8:77:89:09:F8:2B:37:64:37:D5:03:AD:C9:0B
rapid, Jan 6, 2009, trustedCertEntry,
Certificate fingerprint (MD5): 64:9C:EF:2E:44:FC:C6:8F:52:07:D0:51:73:8F:CB:3
QUESTION 1 : why the third party certificate's entry as "trustedCertEntry"? Is it always like this? Do I need to have only one certificate at a time? (If so, just remove the self signed and have 3rd party one)
My Jetty server comes up but when I connect from Client Swing App, the "getServerCertificates()" method only returns one entry i.e self signed one but not the third party one.
I am using like this
URL url = new URL("https://127.0.0.1:port");
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
conn.connect();
Certificate[] certs = conn.getServerCertificates();
Is not this API supposed to return all the server's certificate?
Please guide me or instruct me what to do.
Thanks,
CRBCrossposted and answered.
-
How to print a JTable in Java Swing ?
Hi,
I have an application written in java swing.Now I want to write a print module that prints some details.The details includes the JTextArea and JTable that changes in size dynamically.One solution i found is to put them in a panel and print that panel.But it is static.The size of JTable and JTextArea changes, according to the given input.Please give me a solution for this.Printing is a bit of a nightmare, actually. Most of the trouble is layout. Basically a Printable is passed a page number and a graphics context and has to work out what components go on that page and where. It can't depend on the pages being requested in sequence.
You can call getPrintable from a JTable, and you can call that through your own Printable in order to add extra pages. However you can't ask a Printable how many pages it's going to produce, you just have to invoke it and see if it returns a code to say that the page is out of range.
And the Printable JTable generates is very limited, the table has to occupy full pages, you can't tell it to start in a different place on the first page, or find out how much space it's used on the last page. The headers and footers generate JTable's own idea of a page number, not yours.
You can call print() on most Swing components, but you'll need to set their size and location first, and/or mess with the transformation in the graphics context. -
Why not Deprecate java.util.Date and java.util.Calendar
With the introduction of java.time, why did you not flag java.util.Date and java.util.Calendar. These classes have been a bane to every Java developer and should never be used again with the introduction of Java 1.8.
Adding the @Deprecated annotation would only just provide a warning about an old API and recommendation to the developer(s) to no longer use it. Doing so would not break any existing library out there; in fact quite a number of constructors and methods on the Date class have already been flagged deprecated.
The new java.time package is far superior to Date/Calendar. -
Loading large files in Java Swing GUI
Hello Everyone!
I am trying to load large files(more then 70 MB of xml text) in a Java Swing GUI. I tried several approaches,
1)Byte based loading whith a loop similar to
pane.setText("");
InputStream file_reader = new BufferedInputStream(new FileInputStream
(file));
int BUFFER_SIZE = 4096;
byte[] buffer = new byte[BUFFER_SIZE];
int bytesRead;
String line;
while ((bytesRead = file_reader.read(buffer, 0, BUFFER_SIZE)) != -1)
line = new String(buffer, 0, bytesRead);
pane.append(line);
}But this is gives me unacceptable response times for large files and runs out of Java Heap memory.
2) I read in several places that I could load only small chunks of the file at a time and when the user scrolls upwards or downwards the next/previous chunk is loaded , to achieve this I am guessing extensive manipulation for the ScrollBar in the JScrollPane will be needed or adding an external JScrollBar perhaps? Can anyone provide sample code for that approach? (Putting in mind that I am writting code for an editor so I will be needing to interact via clicks and mouse wheel roatation and keyboard buttons and so on...)
If anyone can help me, post sample code or point me to useful links that deal with this issue or with writting code for editors in general I would be very grateful.
Thank you in advance.Hi,
I'm replying to your question from another thread.
To handle large files I used the new IO libary. I'm trying to remember off the top of my head but the classes involved were the RandomAccessFile, FileChannel and MappedByteBuffer. The MappedByteBuffer was the best way for me to read and write to the file.
When opening the file I had to scan through the contents of the file using a swing worker thread and progress monitor. Whilst doing this I indexed the file into managable chunks. I also created a cache to further optimise file access.
In all it worked really well and I was suprised by the performance of the new IO libraries. I remember loading 1GB files and whilst having to wait a few seconds to perform the indexing you wouldn't know that the data for the JList was being retrieved from a file whilst the application was running.
Good Luck,
Martin. -
Java swing dynamic forms (in a loop)
Hi All,
Is it possible to dynamically create forms using java swing? What I mean to ask is that if I have the necessary information in a table, like the label and a corresponding text field, I can loop through and create the required number of fields. If I do it this way and when the users add text, will I not lose the ability to access each JTextField through its own variable? Is this possible? Basically, I need to be able to access each field through its own variable to do some additional validations on the text entered, etc. Please let me know, if it is possible through java swing.
Any help in this regard is greatly appreciated.
Thanks.mrbean1975 wrote:
..Is it possible to dynamically create forms using java swing? If by java swing you mean Java Swing, then yes. -
Hi friends,
I need to create session in java swing...
I have a client running in swing and can access resources in multi-threaded server. I need to validate user using session. But i don't know how to use session.
User has to login with username & password (authentication verified at server using socket communication).
If successful the login frame vanishes and other options are displayed. user has a feature that he can send files to other
user. so i need to use session for security purpose.
Anyone help me with code
Edited by: sathya_vn on Apr 20, 2008 5:41 PMAnyone help me with the code-----> u got tat wrong..
I need to know how to use session with java swing. I requested if anyone has such code....
This is a part of my project .
Am using MySQL Database to store username and password.
Cleint side interface has a frame (first frame--frame1) requesting client to provide login information. The login details <username and password> are sent to server. server validates whether the login info are correct or not and return true or false .
If false the frame1 will show a JOptionPane ... message stating that wrong username or password specified.
If true i need to create a session and other operations are done after session validation. I am using ssl socket.
If u want the code then i have post around 300 or more lines..
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