JButton.setEnabled(false) - clickable
Hello,
i'm writing a Swing Application, therefor i'm using javax.swing.JButton
. At awt i could use button.setEnabled(false) and so this certain Button is not clickable, events will not be recieved, and his Layout is modified to "disabled". But with JButtons i'm able to recieve events from them, even if they're disabled? So how to disable, and then at some time enable them?
(Sorry, I'm new to Swing)
Thank you.
Best regards.
Nico
Hello,
i'm a bit confused. I'm using sun studio 4 for giu editing. So i set in the properties of the button the "enabled" property to false. So the generated code looks like:
private javax.swing.JButton disconnect_button;
disconnect_button = new javax.swing.JButton();
disconnect_button.setFont(new java.awt.Font("MS Sans Serif", 1, 11));
disconnect_button.setText("disconnect");
disconnect_button.setEnabled(false);
disconnect_button.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseReleased(java.awt.event.MouseEvent evt) {
disconnect_buttonMouseReleased(evt);
But what happens is: the button seems to be diabled, so he looks like. But i am able to recieve events from the button. So when i click on the button (mouse released event), the method "disconnect_buttonMouseReleased(evt)" is executed.
Thanks,
Nico
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JButton setEnabled method is not refreshing state
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The app show a login JFrame and then the screen that has these options, that is like the main form.
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Here is where the thread is started:
public void readDataLogger() {
jButton.setEnabled(false);
jBox.setEnabled(false);
String deleteData = JOptionPane.showInputDialog("Would you like to erase all the data off this logger after it is downloaded? (y/n)");
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} else if (deleteData.equalsIgnoreCase("y") || deleteData.equalsIgnoreCase("yes")) {
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routeNum.setText("Route Num: " + (String) jBox.getSelectedItem());
waiting.setText("Please wait a moment...");
Thread stepper = new BarThread(progressBar);
stepper.start();
this.add(progressBar);
Task task = new Task();
task.execute();
}And the thread classes:
class BarThread extends Thread {
JProgressBar progressBar;
public BarThread(JProgressBar bar) {
progressBar = bar;
public void run() {
class Task extends SwingWorker<Void, Void>{
boolean wrongPort;
long timeGoneBy = 0;
* Main task. Executed in background thread.
public Void doInBackground() {
wrongPort = true;
try {
logWriter.append("starting new thread");
logWriter.flush();
} catch (IOException ex) {
Logger.getLogger(DDAGPS.class.getName()).log(Level.SEVERE, null, ex);
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File propertiesFile = new File("port.properties");
Properties properties = new Properties();
String command = "";
int portTry = 0;
boolean propPort = false;
if (propertiesFile.exists()) {
try {
properties.load(new FileInputStream("port.properties"));
} catch (IOException ex) {
ex.printStackTrace();
if (properties.containsKey("port")) {
portTry = Integer.parseInt((String) properties.get("port"));
try {
logWriter.append("port from properties: " + portTry + "\r\n");
logWriter.flush();
} catch (IOException ex) {
ex.printStackTrace();
command = baseDir + "GPSBabel/gpsbabel.exe -p \"\" -w -t -i mtk";
if (erase) {
command += ",erase";
command += " -f com" + portTry + ": -o gpx,gpxver=1.0 -F " + baseDir + "Temp/" + jBox.getSelectedItem() + "-" + numbLoggers + ".gpx";
launching.setText("trying it on COM" + portTry);
try {
logWriter.append("command using port from props: " + command + "\r\n");
logWriter.flush();
Process p = rt.exec(command);
File bin = new File(baseDir + "data.bin");
boolean fileExists = false;
double time = 0.0;
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Thread.sleep(200);
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logWriter.append("error: " + ex.getMessage() + " trying to use GPSBabel with port from properties file\r\n");
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ex1.printStackTrace();
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ex.printStackTrace();
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try {
Process p = rt.exec("mode.com");
String s = null;
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logWriter.flush();
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logWriter.flush();
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command += ",erase";
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logWriter.append("command: " + command + "\r\n");
logWriter.flush();
p = rt.exec(command);
boolean fileExists = false;
while (!procDone(p) && wrongPort && !fileExists) {
Thread.sleep(100);
long currentTime2 = System.currentTimeMillis();
timeGoneBy = (currentTime2 - currentTime1);
Long seconds = timeGoneBy / 1000;
int hundreds = (int) (timeGoneBy / 100) % 10;
timer.setText(seconds + "." + hundreds + " s");
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File bin = new File(baseDir + "data.bin");
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wrongPort = true;
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logWriter.flush();
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//FileWriter fw = new FileWriter(port);
//fw.append("port=" + String.valueOf((ports.get(portTry))));
//fw.flush();
//fw.close();
launching.setText("it worked on COM" + ports.get(portTry) + ", building data file...");
wrongPort = false;
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fileExists = true;
logWriter.append("wrongPort: " + wrongPort + "\r\n");
logWriter.flush();
logWriter.append("fileExists: " + fileExists + "\r\n");
logWriter.flush();
logWriter.append("procDone: " + procDone(p) + "\r\n");
logWriter.flush();
portTry++;
} catch (IOException ex) {
ex.printStackTrace();
} catch (InterruptedException ex) {
ex.printStackTrace();
return null;
private boolean procDone(Process p) {
try {
int v = p.exitValue();
return true;
} catch (IllegalThreadStateException e) {
return false;
* Executed in event dispatch thread
public void done() {
try {
logWriter.append("in done!\r\n");
logWriter.append("wrongPort: " + wrongPort);
logWriter.flush();
} catch (IOException ex) {
Logger.getLogger(DDAGPS.class.getName()).log(Level.SEVERE, null, ex);
launching.setText("");
ddagps.repaint();
File bin = new File(baseDir + "data.bin");
if (wrongPort) {
//wrongPort = false;
String message = "Something went wrong. Please make sure the device is turned on and replug the " +
"device into the USB port and hit OK.";
int response = redo(message);
if (response == 1) {
System.exit(0);
} else {
timer.setText("");
readDataLogger();
} else {
try {
logWriter.append("i am in done's else!\r\n");
logWriter.flush();
} catch (IOException ex) {
Logger.getLogger(DDAGPS.class.getName()).log(Level.SEVERE, null, ex);
launching.setText("creating gpx file");
ddagps.repaint();
File file = new File(baseDir + "Temp/" + jBox.getSelectedItem() + "-" + numbLoggers + ".gpx");
while (!file.exists()) {
try {
Thread.sleep(100);
} catch (InterruptedException ex) {
ex.printStackTrace();
//System.out.println("f1 does not exist");
numbLoggers++;
ddagps.remove(progressBar);
takeAWhile.setText("");
Toolkit.getDefaultToolkit().beep();
jBox.setEnabled(true);
jButton.setEnabled(true);
waiting.setText("Done!\n");
String moreDevices = JOptionPane.showInputDialog("Do you have any more devices to enter in? (y/n)");
if (moreDevices == null) {
// user clicked cancel
} else if (moreDevices.equalsIgnoreCase("y") || moreDevices.equalsIgnoreCase("yes")) {
JOptionPane.showMessageDialog(null, "Hit OK when the next logger is plugged in.");
timer.setText("");
bin.delete();
readDataLogger();
} else if (moreDevices.equalsIgnoreCase("n") || moreDevices.equalsIgnoreCase("no")) {
launching.setText("Merging files...");
ddagps.repaint();
int numb = numbLoggers - 1;
File f = new File(baseDir + "Temp/" + jBox.getSelectedItem() + "-" + numb + ".gpx");
while (!f.exists()) {
try {
Thread.sleep(200);
} catch (InterruptedException ex) {
ex.printStackTrace();
//System.out.println("f2 does not exist");
//System.out.println("found " + f.getName());
ParseAndCombineKMLs pack = new ParseAndCombineKMLs(numbLoggers, jBox.getSelectedItem());
if (pack.parseAndCombine()) {
f = new File(baseDir + "Output/" + jBox.getSelectedItem() + ".kml");
while (!f.exists()) {
try {
Thread.sleep(100);
} catch (InterruptedException ex) {
ex.printStackTrace();
//System.out.println("f3 does not exist");
Uploader up = new Uploader(upload);
if (up.pushFile(baseDir + "Output/" + jBox.getSelectedItem() + ".kml")) {
launching.setText("Upload Successful");
Runtime rt = Runtime.getRuntime();
try {
rt.exec("C:/Program Files/Mozilla Firefox/firefox.exe " + view + "?route=" + jBox.getSelectedItem());
bin = new File(baseDir + "data.bin");
bin.delete();
launching.setText("Launching browswer with your data...");
} catch (IOException ex) {
ex.printStackTrace();
try {
logWriter.close();
} catch (IOException ex) {
ex.printStackTrace();
}Edited by: dmikester1 on Nov 5, 2008 8:50 AM -
Decompiled Sun's Active X Bridge Bean Examples
The examples you can download, JCalendarPanel and JellyBean, I unzipped the jar files and then ran each class file through a decompiler which produced some decent code to look at.
It at least gave me one perspective to see what was going on...on the Java side of things.
See one of the main classes for calendar below...
package wkw.beans.ui;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.*;
import javax.swing.*;
// Referenced classes of package wkw.beans.ui:
// ArrowIcon
public class JCalendarPanel extends JPanel
implements ActionListener
private static final int BUTTON_COUNT = 42;
private static final int LABEL_COUNT = 7;
private transient JButton days[];
private transient JLabel dayOfWeekLabel[];
private transient JButton selectedButton;
private transient JComboBox monthChoice;
private transient JLabel yearLabel;
private transient int selectedMonth;
private transient int selectedYear;
private transient int selectedDay;
private transient int cellHeight;
private transient int cellWidth;
private transient int sundayColumnIndex;
private transient JPanel headerPanel;
private transient JPanel calendarGridPanel;
private transient JButton nextYearButton;
private transient JButton prevYearButton;
private transient JButton nextMonthButton;
private transient JButton prevMonthButton;
private static final int numDays[] = {
31, 28, 31, 30, 31, 30, 31, 31, 30, 31,
30, 31
private transient Vector months;
private Date selectedDate;
private transient PropertyChangeSupport changes;
public JCalendarPanel()
days = new JButton[42];
dayOfWeekLabel = new JLabel[7];
selectedButton = null;
sundayColumnIndex = 0;
months = new Vector(12);
selectedDate = new Date();
changes = new PropertyChangeSupport(this);
setFont(new Font("Dialog", 0, 12));
FontMetrics fontmetrics = getFontMetrics(getFont());
cellHeight = fontmetrics.getHeight() + 10;
cellWidth = fontmetrics.stringWidth("WWW") + 10;
setLayout(new BorderLayout());
headerPanel = new JPanel();
calendarGridPanel = new JPanel();
headerPanel.setLayout(new FlowLayout());
calendarGridPanel.setLayout(new GridLayout(7, 7));
add(headerPanel, "North");
add(calendarGridPanel, "Center");
Insets insets = new Insets(1, 1, 1, 1);
yearLabel = new JLabel("");
nextMonthButton = new JButton(new ArrowIcon(1));
nextMonthButton.setAlignmentY(0.5F);
nextMonthButton.setMargin(insets);
nextMonthButton.addActionListener(this);
prevMonthButton = new JButton(new ArrowIcon(2));
prevMonthButton.setAlignmentY(0.5F);
prevMonthButton.setMargin(insets);
prevMonthButton.addActionListener(this);
nextYearButton = new JButton(new ArrowIcon(0));
nextYearButton.setAlignmentY(0.5F);
nextYearButton.setMargin(insets);
nextYearButton.addActionListener(this);
prevYearButton = new JButton(new ArrowIcon(3));
prevYearButton.setAlignmentY(0.5F);
prevYearButton.setMargin(insets);
prevYearButton.addActionListener(this);
buildMonths();
monthChoice = new JComboBox(months);
monthChoice.addActionListener(this);
headerPanel.add(prevYearButton);
headerPanel.add(prevMonthButton);
headerPanel.add(monthChoice);
headerPanel.add(yearLabel);
headerPanel.add(nextMonthButton);
headerPanel.add(nextYearButton);
buildDays();
buildCells();
Date date = new Date();
setSelectedDate(date);
public void actionPerformed(ActionEvent actionevent)
Object obj = actionevent.getSource();
if(obj == nextMonthButton)
nextMonth();
return;
if(obj == prevMonthButton)
lastMonth();
return;
if(obj == nextYearButton)
nextYear();
return;
if(obj == prevYearButton)
lastYear();
return;
if(obj == monthChoice)
JComboBox jcombobox = (JComboBox)obj;
selectedMonth = jcombobox.getSelectedIndex();
setButtonState(selectedButton, false);
selectedButton = null;
Calendar calendar = Calendar.getInstance();
calendar.set(selectedYear, selectedMonth, selectedDay);
setSelectedDate(calendar.getTime());
return;
if(obj instanceof JButton)
for(int i = 0; i < 42; i++)
if(obj == days)
if(selectedButton != null)
setButtonState(selectedButton, false);
selectedButton = days[i];
setButtonState(selectedButton, true);
selectedDay = Integer.parseInt(days[i].getText());
Calendar calendar1 = Calendar.getInstance();
calendar1.set(selectedYear, selectedMonth, selectedDay);
setSelectedDate(calendar1.getTime());
return;
public void addPropertyChangeListener(PropertyChangeListener propertychangelistener)
changes.addPropertyChangeListener(propertychangelistener);
private void buildCells()
int i = sundayColumnIndex;
for(int j = 0; j < 42; j++)
JButton jbutton = new JButton(" ");
jbutton.setEnabled(false);
jbutton.setSize(cellWidth, cellHeight);
jbutton.addActionListener(this);
jbutton.setSelected(false);
jbutton.setBorderPainted(false);
if(j == i)
jbutton.setForeground(Color.red);
i += 7;
calendarGridPanel.add(jbutton);
days[j] = jbutton;
private void buildDays()
Calendar calendar = Calendar.getInstance();
SimpleDateFormat simpledateformat = (SimpleDateFormat)DateFormat.getDateInstance(0);
simpledateformat.applyPattern("EEE");
boolean flag = false;
int i = calendar.getFirstDayOfWeek();
for(int j = 0; j < 7; j++)
if(i == 1)
calendar.set(1997, 5, j + 1);
} else
calendar.set(1997, 8, j + 1);
StringTokenizer stringtokenizer = new StringTokenizer(simpledateformat.format(calendar.getTime()));
JLabel jlabel = new JLabel(stringtokenizer.nextElement().toString(), 0);
jlabel.setSize(cellWidth, cellHeight);
if(!flag && calendar.get(7) == 1)
jlabel.setForeground(Color.red);
sundayColumnIndex = j;
flag = true;
calendarGridPanel.add(jlabel);
dayOfWeekLabel[j] = jlabel;
private void buildMonths()
Calendar calendar = Calendar.getInstance();
SimpleDateFormat simpledateformat = (SimpleDateFormat)DateFormat.getDateInstance(0);
simpledateformat.applyPattern("MMMM");
for(int i = 0; i < 12; i++)
calendar.set(1997, i, 2);
months.addElement(simpledateformat.format(calendar.getTime()));
private int getDaysInMonth(int i, int j)
int k = j;
int l = numDays[i];
if(i == 1 && k % 4 == 0 && (k % 100 != 0 || k % 400 == 0))
l = 29;
return l;
public Date getSelectedDate()
Calendar calendar = Calendar.getInstance();
calendar.set(selectedYear, selectedMonth, selectedDay);
return calendar.getTime();
private void lastMonth()
setButtonState(selectedButton, false);
selectedButton = null;
if(--selectedMonth < 0)
selectedMonth = 11;
selectedYear--;
Calendar calendar = Calendar.getInstance();
calendar.set(selectedYear, selectedMonth, selectedDay);
setSelectedDate(calendar.getTime());
private void lastYear()
setButtonState(selectedButton, false);
selectedButton = null;
selectedYear--;
Calendar calendar = Calendar.getInstance();
calendar.set(selectedYear, selectedMonth, selectedDay);
setSelectedDate(calendar.getTime());
private void nextMonth()
setButtonState(selectedButton, false);
selectedButton = null;
if(++selectedMonth > 11)
selectedMonth = 0;
selectedYear++;
Calendar calendar = Calendar.getInstance();
calendar.set(selectedYear, selectedMonth, selectedDay);
setSelectedDate(calendar.getTime());
private void nextYear()
setButtonState(selectedButton, false);
selectedButton = null;
selectedYear++;
Calendar calendar = Calendar.getInstance();
calendar.set(selectedYear, selectedMonth, selectedDay);
setSelectedDate(calendar.getTime());
protected String paramString()
StringBuffer stringbuffer = new StringBuffer("selectedDate=");
SimpleDateFormat simpledateformat = (SimpleDateFormat)DateFormat.getDateInstance(0);
stringbuffer.append(simpledateformat.format(selectedDate));
stringbuffer.append(", locale=");
stringbuffer.append(Locale.getDefault().getDisplayName());
return stringbuffer.toString();
public void removePropertyChangeListener(PropertyChangeListener propertychangelistener)
changes.removePropertyChangeListener(propertychangelistener);
private void setButtonState(JButton jbutton, boolean flag)
if(jbutton != null)
jbutton.setBorderPainted(flag);
jbutton.setSelected(flag);
public void setSelectedDate(Date date)
if(date != null)
Date date1 = selectedDate;
selectedDate = date;
Calendar calendar = Calendar.getInstance();
calendar.setTime(selectedDate);
selectedMonth = calendar.get(2);
selectedYear = calendar.get(1);
selectedDay = calendar.get(5);
changes.firePropertyChange("selectedDate", date1, date);
updateDisplay();
public String toString()
return getClass().getName() + "[" + paramString() + "]";
private void updateDisplay()
Calendar calendar = Calendar.getInstance();
calendar.set(selectedYear, selectedMonth, 1);
Date date = calendar.getTime();
calendar.setTime(date);
int i = calendar.get(7) - calendar.getFirstDayOfWeek();
int j = 1;
int k = getDaysInMonth(selectedMonth, selectedYear);
for(int l = 0; l < 42; l++)
JButton jbutton = days[l];
if(l < i)
jbutton.setVisible(false);
} else
jbutton.setText(Integer.toString(j));
if(j == selectedDay)
if(selectedButton != null)
setButtonState(selectedButton, false);
selectedButton = jbutton;
setButtonState(selectedButton, true);
if(j <= k)
jbutton.setEnabled(true);
jbutton.setVisible(true);
j++;
} else
jbutton.setVisible(false);
yearLabel.setText(Integer.toString(selectedYear));
monthChoice.setSelectedIndex(selectedMonth);It might be helpful to note that a good place to see how to use this stuff is here:
http://java.sun.com/j2se/1.4.2/docs/guide/beans/axbridge/developerguide/
and that the point is not to know the implementation. The point is to know the interface.
From http://home1.pacific.net.sg/~wongkw/TestCal4.java
import java.awt.*;
import java.awt.event.*;
import java.beans.*;
import java.util.*;
import java.text.*;
import javax.swing.*;
import wkw.beans.ui.JCalendarPanel;
public class TestCal4 implements PropertyChangeListener {
JTextField date = new JTextField(15);
wkw.beans.ui.JCalendarPanel cal = null;
DateFormat dateFormat = DateFormat.getDateInstance(DateFormat.SHORT);
public static void main(String args[]) {
TestCal4 tc = new TestCal4();
public TestCal4() {
try {
cal = (wkw.beans.ui.JCalendarPanel)Beans.instantiate(
TestCal4.class.getClassLoader(), "wkw.beans.ui.JCalendarPanel");
if (cal == null) {
System.err.println("Unable to load bean, aborting...");
System.exit(-1);
} catch (Exception e) {
System.err.println(
"Exception when loading bean, aborting..." + e);
System.exit(-1);
// cal = new wkw.beans.ui.JCalendarPanel();
cal.addPropertyChangeListener(this);
JFrame f = new JFrame("Test JCalendarPanel");
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent evt) {
Window win = evt.getWindow();
win.setVisible(false);
win.dispose();
System.exit(0);
f.getContentPane().setLayout(new BorderLayout());
f.getContentPane().add(cal, BorderLayout.CENTER);
JPanel input = new JPanel();
JButton set = new JButton("Set");
set.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent act) {
try {
Date setDate = dateFormat.parse(date.getText());
if (setDate != null) {
cal.setSelectedDate(setDate);
} catch (ParseException e) {
//do nothing
input.add(date);
input.add(set);
f.getContentPane().add(input, BorderLayout.SOUTH);
f.pack();
f.show();
public void propertyChange(PropertyChangeEvent event) {
Date oldDate = (Date)event.getOldValue();
Date newDate = (Date)event.getNewValue();
Date selectedDate = cal.getSelectedDate();
System.out.println("==========================");
System.out.println("Old date= " + oldDate);
System.out.println("New date= " + newDate);
System.out.println("Selected date= " + selectedDate);
System.out.println("==========================");
}One other comment: I usually play some childish game rather than simply admit that I use reverse compilers. It frustrates those who would otherwise bug me about reverse-engineering something that I do not have permission to do so.
One last comment: I suspect that the original, much-more-readable source is available. If I find it, I will provide a pointer. -
SetEnabled to false for a JSpinner
hi all,
I've got a little problem that I hope someone can solve for me.
I'm trying to setEnabled() to false for my JSpinners, at run time, even though it is set to false, the JSpinner is still enabled and allows editing.
Is this because JSpinners doesn't allow it to be disabled, or I have done something fatally wrong?
Here is a snipet of my code.
SpinnerNumberModel spinDays = new SpinnerNumberModel(days,0,30,1);
spinnerDays = new JSpinner(spinDays);
spinnerDays.addChangeListener(new ChangeListener(){
public void stateChanged(ChangeEvent e){
setSpinnerDays();
spinnerDays.setEnabled(false);
Gabriel.This bug has been fixed in JDK1.4 beta 2. Download the latest version.
Cheers,
Joris
http://www.esus.com -
How do i use jbutton for mutiple frames(2frames)???
im an creating a movie database program and i have a problem with the jButtons on my second frame i dont know how to make them work when clicked on. i managed to make the jButtons work on my first frame but not on the second....
here is that code so far----
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
* real2.java
* Created on December 7, 2007, 9:00 AM
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
* @author J
public class real2 extends JPanel implements ActionListener{
private JButton addnew;
private JButton help;
private JButton exit;
private JFrame frame1;
private JButton save;
private JButton cancel;
private JButton save2;
private JLabel moviename;
private JTextField moviename2;
private JLabel director;
private JTextField director2;
private JLabel year;
private JTextField year2;
private JLabel genre;
private JTextField genre2;
private JLabel plot;
private JTextField plot2;
private JLabel rating;
private JTextField rating2;
/** Creates a new instance of real2 */
public real2() {
super(new GridBagLayout());
//Create the Buttons.
addnew = new JButton("Add New");
addnew.addActionListener(this);
addnew.setMnemonic(KeyEvent.VK_E);
addnew.setActionCommand("Add New");
help = new JButton("Help");
help.addActionListener(this);
help.setActionCommand("Help");
exit = new JButton("Exit");
exit.addActionListener(this);
exit.setActionCommand("Exit");
String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
Object[][] data = {
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)}
final JTable table = new JTable(data, columnNames);
table.setPreferredScrollableViewportSize(new Dimension(600, 100));
table.setFillsViewportHeight(true);
//Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
//Add the scroll pane to this panel.
add(scrollPane);
GridBagConstraints c = new GridBagConstraints();
c.weightx = 1;
c.gridx = 0;
c.gridy = 1;
add(addnew, c);
c.gridx = 0;
c.gridy = 2;
add(help, c);
c.gridx = 0;
c.gridy = 3;
add(exit, c);
public static void addComponentsToPane(Container pane){
pane.setLayout(null);
//creating the components for the new frame
JButton save = new JButton("Save");
JButton save2 = new JButton("Save and add another");
JButton cancel = new JButton("Cancel");
JLabel moviename= new JLabel("Movie Name");
JTextField moviename2 = new JTextField(8);
JLabel director = new JLabel("Director");
JTextField director2 = new JTextField(8);
JLabel genre = new JLabel("Genre");
JTextField genre2 = new JTextField(8);
JLabel year = new JLabel("year");
JTextField year2 = new JTextField(8);
JLabel plot = new JLabel("Plot");
JTextField plot2 = new JTextField(8);
JLabel rating = new JLabel("Rating(of 10)");
JTextField rating2 = new JTextField(8);
//adding components to new frame
pane.add(save);
pane.add(save2);
pane.add(cancel);
pane.add(moviename);
pane.add(moviename2);
pane.add(director);
pane.add(director2);
pane.add(genre);
pane.add(genre2);
pane.add(year);
pane.add(year2);
pane.add(plot);
pane.add(plot2);
pane.add(rating);
pane.add(rating2);
//setting positions of components for new frame
Insets insets = pane.getInsets();
Dimension size = save.getPreferredSize();
save.setBounds(100 , 50 ,
size.width, size.height);
size = save2.getPreferredSize();
save2.setBounds(200 , 50 ,
size.width, size.height);
size = cancel.getPreferredSize();
cancel.setBounds(400 , 50 ,
size.width, size.height);
size = moviename.getPreferredSize();
moviename.setBounds(100 , 100 ,
size.width, size.height);
size = moviename2.getPreferredSize();
moviename2.setBounds(200 , 100 ,
size.width, size.height);
size = director.getPreferredSize();
director.setBounds(100, 150 ,
size.width, size.height);
size = director2.getPreferredSize();
director2.setBounds(200 , 150 ,
size.width, size.height);
size = genre.getPreferredSize();
genre.setBounds(100 , 200 ,
size.width, size.height);
size = genre2.getPreferredSize();
genre2.setBounds(200 , 200 ,
size.width, size.height);
size = year.getPreferredSize();
year.setBounds(100 , 250 ,
size.width, size.height);
size = year2.getPreferredSize();
year2.setBounds(200 , 250 ,
size.width, size.height);
size = plot.getPreferredSize();
plot.setBounds(100 , 300 ,
size.width, size.height);
size = plot2.getPreferredSize();
plot2.setBounds(200 , 300 ,
size.width, size.height);
size = rating.getPreferredSize();
rating.setBounds(100 , 350 ,
size.width, size.height);
size = rating2.getPreferredSize();
rating2.setBounds(200 , 350 ,
size.width, size.height);
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
frame.add(new real2());
//Display the window.
frame.setSize(600, 360);
frame.setVisible(true);
frame.pack();
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();
public void actionPerformed(ActionEvent e) {
if ("Add New".equals(e.getActionCommand())){
frame1 = new JFrame("add");
frame1.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
addComponentsToPane(frame1.getContentPane());
frame1.setSize(600, 500);
frame1.setVisible(true);
//disableing first frame etc:-
if (frame1.isShowing()){
addnew.setEnabled(false);
help.setEnabled(false);
exit.setEnabled(true);
frame1.setVisible(true);
}else{
addnew.setEnabled(true);
help.setEnabled(true);
exit.setEnabled(true);
if ("Exit".equals(e.getActionCommand())){
System.exit(0);
if ("Save".equals(e.getActionCommand())){
// whatever i ask it to do it wont for example---
help.setEnabled(true);
if ("Save" == e.getSource()) {
//i tried this way too but it dint work here either
help.setEnabled(true);
}so if someone could help me by either telling me what to type or by replacing what iv done wrong that would be great thanks...(1)Java class name should begin with a capital letter. See: http://java.sun.com/docs/codeconv/
JButton save = new JButton("Save");
JButton save2 = new JButton("Save and add another");
// ... etc. ...(2)Don't redeclare class members in a method as its local variable. Your class members become eternally null, a hellish null.
how to make them work when clicked on(3)Add action listener to them. -
Problem in displaying Icon on JButton
Hi,
I have a problem ..
In my program I have to set Icon for a Jbutton and wait for 2 secs and then remove the Icon..
I used jb.setIcon(Imageicon) (jb is button reference) to set the icon and jb.setIcon(null) to remove Icon
Now no Icon is displayed on the button at all....
My code looks like below mentioned
jb.setIcon(Imageicon)
Thread.sleep(2000);
jb.setIcon(null)
plz reply mee at the earliest...the code snipped is like this..
the below mentioned code is in actionPerformed method
pres.setIcon(iial.get(Integer.parseInt(pres.getName()))); //icon for prev is already set
System.out.println("Icon for pres is set now");
// need to wait for 2 seconds before both the icons are set to null
prev.setIcon(null);
pres.setIcon(null);Here prev and pres are references to JButtons.
I tried the swing timers but couldnt succeed (i might be implemented them in an incorrect way coz im not familiar with them)
plz cud you provide me with am example program or a solution to above scenario in a program.....
Here is the actual program if you want you can run it with keeping atleast 9 images in tn folder and changing maxpics value to 9
Game.java
package com;
//Concentration Game
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.Collections;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class Game extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
public static void main(String args[]) throws InterruptedException,
InvocationTargetException {
System.out.println();
SwingUtilities.invokeLater(new Runnable() {
public void run() {
Game cg = new Game();
cg.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Logic logic;
private int[][] arr;
private Container contents;
private JLabel controlLabel;
private JPanel controlPanel;
private JButton[][] gameBoardLabel;
private JPanel gamePanel;
private ArrayList<ImageIcon> iial;
private boolean isNewAction = true, isFirstAction = true;
private JButton prev, pres;
private long s_time, e_time, t_time;
private int SIZE, arrvalue, maxpics = 51, pairscount, no_of_pairs;
public Game() {
super("Concentration Game");
logic = new Logic();
logic.populateArray();
logic.shuffle();
logic.printArray();
arr = logic.getArray();
SIZE = logic.getSize();
no_of_pairs = (SIZE * SIZE) / 2;
iial = new ArrayList<ImageIcon>();
for (int i = 1; i <= maxpics; i++) {
iial.add(new ImageIcon(this.getClass().getClassLoader()
.getResource("tn/image" + i + ".jpg")));
Collections.shuffle(iial);
System.out.println("Completed loading images");
contents = getContentPane();
contents.setLayout(new BorderLayout());
gameBoardLabel = new JButton[SIZE][SIZE];
new JPanel();
gamePanel = new JPanel();
controlPanel = new JPanel();
gamePanel.setLayout(new GridLayout(SIZE, SIZE, 5, 5));
controlLabel = new JLabel("Game not started");
for (int r = 0; r < gameBoardLabel.length; r++) {
for (int c = 0; c < gameBoardLabel[r].length; c++) {
arrvalue = arr[r][c];
System.out.println(arrvalue);
if (arr[r][c] == 0) {
gameBoardLabel[r][c] = new JButton();
gameBoardLabel[r][c].setEnabled(false);
else
gameBoardLabel[r][c] = new JButton();
gameBoardLabel[r][c].addActionListener(this);
gameBoardLabel[r][c].setName("" + arrvalue);
gameBoardLabel[r][c].setPressedIcon(iial.get(arrvalue));
gamePanel.add(gameBoardLabel[r][c]);
controlPanel.add(controlLabel);
contents.add(gamePanel, BorderLayout.CENTER);
contents.add(controlPanel, BorderLayout.SOUTH);
setSize(400, 500);
setVisible(true);
System.out.println(this);
@Override
public void actionPerformed(ActionEvent e) {
JButton jb = (JButton) e.getSource();
// System.out.println(jb.getName());
System.out.println(e.getSource());
if (isFirstAction) {
controlLabel.setText("Game Started");
s_time = System.currentTimeMillis();
isFirstAction = false;
System.out.println(this);
if (isNewAction) {
prev = pres = jb;
jb.setIcon(iial.get(Integer.parseInt(jb.getName())));
isNewAction = false;
return;
prev = pres;
pres = jb;
if (pres == prev)
return;
if (pres.getName().equals(prev.getName())) {
pres.setIcon(iial.get(Integer.parseInt(pres.getName())));
pres.removeActionListener(this);
prev.removeActionListener(this);
controlLabel.setText("pair matched");
resetAttributes();
System.out.println("haha----last count==" + ++pairscount);
if (pairscount == no_of_pairs) {
e_time = System.currentTimeMillis();
t_time = (e_time - s_time) / 1000;
controlLabel.setText("Game Over in " + t_time + " secs");
System.out.println("done");
System.out.println(pres);
pres.setIcon(iial.get(Integer.parseInt(pres.getName())));
controlLabel.setText("pair didn't match");
System.out.println("pres is set now");
prev.setIcon(null);
pres.setIcon(null);
resetAttributes();
private void resetAttributes() {
prev = pres = null;
isNewAction = true;
Logic.java
package com;
import java.util.ArrayList;
import java.util.Collections;
import javax.swing.JOptionPane;
public class Logic{
ArrayList<Integer> al;
int arr[][],arrlist[][],elements=1;
int SIZE;
int[][] getArray()
return arrlist;
int getSize(){
return SIZE;
public static void main(String args[]){
Logic logic =new Logic();
logic.populateArray();
logic.shuffle();
logic.printArray();
//System.out.println(logic.elements);
void populateArray(){
String input=JOptionPane.showInputDialog(null,"Enter Size of the array (less than 11)" );
SIZE=Integer.parseInt(input);
int cnt = 0;
arrlist=new int[SIZE][SIZE];
al=new ArrayList<Integer>();
for (int r = 0; r < SIZE; r++)
for (int c = 0; c < SIZE; c++)
al.add(elements);
cnt++;
if (cnt == 2)
cnt = 0;
elements++;
public void printArray() {
for (int i = 0; i < SIZE; i++)
for (int j = 0; j < SIZE; j++)
arrlist[i][j] = al.get(j + i * SIZE);
System.out.print(" "+arrlist[i][j]);
System.out.println();
public void shuffle() {
Collections.shuffle(al);
if(SIZE%2!=0)
int cindex=(SIZE*SIZE)/2; //center index
int celement=al.get(cindex); //center element
int lindex=al.indexOf(elements); //index of large element
//al.remove(cindex);
//al.add(cindex, 0);
al.remove(lindex);
al.add(lindex, celement);
al.remove(cindex);
al.add(cindex, 0);
} -
JButton keeps JFrame from succesfully implementing KeyListener?!
Look at this code:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Test extends JFrame implements KeyListener
private JButton myButton;
public Test()
Container c = getContentPane();
c.setLayout( new FlowLayout() );
myButton = new JButton();
myButton.setEnabled( true );
c.add( myButton );
addKeyListener( this );
setSize( 100, 100 );
show();
public void keyPressed( KeyEvent e )
System.out.println( "keyPressed" );
public void keyReleased( KeyEvent e )
System.out.println( "keyReleased" );
public void keyTyped( KeyEvent e )
System.out.println( "keyTyped" );
public static void main( String args[] )
Test window = new Test();
}When you execute this program, the JFrame does not resolve keystrokes. It should though, because it implements KeyListener and overrides all required methods. But here is the strange thing: Try changing
myButton.setEnabled( true );to
myButton.setEnabled( false );Now the JFrame is able to respond to keystrokes by executing the proper methods! But what use is a button if it is not enabled. I need my buttons in the JFrame, but I also need the JFrame to respond to the keystrokes.
Anyone know about this problem and how to solve it??
Thank you!?? Say you want to make a small game. A square is drawn onto the frame. The user presses the up button on the keybord and the square 'moves' up (it is repainted at a different coordinate). But the user also needs to be able to (re)start the game and exit through the use of JButtons. That is the purpose and the problem is stated in my first post...
Anyone else has an idea?
thx -
Problem disabling JButton in ActionListener after setText of JLabel
What i want is when i click View to see the label say "Viewing ..." and in the same time the btnView (View Button) to be disabled.
I want the same with the other 2 buttons.
My problem is in ActionListener of the button. It only half works.
I cannot disable (setEnabled(false)) the button after it is pressed and showing the JLabel.
The code i cannot run is the 3 buttons setEnabled (2 in comments).
Any light?
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
class BTester extends JFrame implements ActionListener {
JButton btnView, btnBook, btnSearch;
BTester(){ //Constructor
JPanel p = new JPanel();
JButton btnView = new JButton( "View" );
btnView.setActionCommand( "View" );
btnView.addActionListener(this);
JButton btnBook = new JButton( "Book" );
btnBook.setActionCommand( "Book" );
btnBook.addActionListener(this);
JButton btnSearch = new JButton( "Search" );
btnSearch.setActionCommand( "Search" );
btnSearch.addActionListener(this);
p.add(btnView);
p.add(btnBook);
p.add(btnSearch);
getContentPane().add(show, "North"); //put text up
getContentPane().add(p, "South"); //put panel of buttons down
setSize(400,200);
setVisible(true);
setTitle("INITIAL BUTTON TESTER");
show.setFont(new Font("Tahoma",Font.BOLD,20));
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//actionPerformed implemented (overrided)
public void actionPerformed( ActionEvent ae) {
String actionName = ae.getActionCommand().trim();
if( actionName.equals( "View" ) ) {
show.setText("Viewing ...");
btnView.setEnabled(false); // The line of problem
//btnBook.setEnabled(true);
//btnSearch.setEnabled(true);
else if( actionName.equals( "Book" ) ) {
show.setText("Booking ...");
//btnView.setEnabled(true);
//btnBook.setEnabled(false);
//btnSearch.setEnabled(true);
else if( actionName.equals( "Search" ) ) {
show.setText("Searching ...");
//btnView.setEnabled(true);
//btnBook.setEnabled(true);
//btnSearch.setEnabled(false);
} //end actionPerformed
private JLabel show = new JLabel( "Press a button ... " );
public static void main(String[] args) {
new BTester();
} // End BTester class1. Use code formatting when posting code.
2. You have a Null Pointer Exception since in your constructor you create the JButtons and assign them to a local variable instead of the class member.
Change this
JButton btnView = new JButton( "View" );to:
btnView = new JButton( "View" ); -
Renderer problem for a JButton in a JTable
Hi all,
Here is my requirement -
When the value of a particular cell in a JTable gets changed, another cell in the same selected row should display a JButton. The button should remain displayed for that row. Other rows should not have the button displayed unless there is any change in value of other columns in that row.
I have the problem in displaying the button only when the values of a particular row is changed. The button gets displayed if I click that button cell which should not happen as the values are not changed for the corresponding row. Also, once the button is displayed for a particular row, if i click some other row, button gets disappeared for the previously selected row.
Here is the code I have implemented. Please correct me where I am going wrong.
Renderer code for the button-
==================
class ButtonRenderer extends JButton implements TableCellRenderer {
public ButtonRenderer() {
setOpaque(true);
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column)
if (isSelected) {
setForeground(table.getSelectionForeground());
setBackground(table.getSelectionBackground());
} else{
setForeground(table.getForeground());
setBackground(UIManager.getColor("Button.background"));
TableModel model = table.getModel();
// get values from the table model's selected row and specific column
if(// check if values are changed from old ones)
setText("Undo");
setVisible(true);
return (JButton) value;
else
JButton button = new JButton("");
button.setBackground(Color.white);
button.setBorderPainted(false);
button.setMargin(new Insets(0, 0, 0, 0));
button.setEnabled(false);
return button;
Editor code for the button -
=======================
class ButtonCellEditor extends DefaultCellEditor
public ButtonCellEditor(JButton aButton)
super(new JTextField());
setClickCountToStart(0);
aButton.setOpaque(true);
aButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
fireEditingStopped();
editorComponent = aButton;
protected void fireEditingStopped()
super.fireEditingStopped();
public Object getCellEditorValue()
return editorComponent;
public boolean stopCellEditing()
return super.stopCellEditing();
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column)
return editorComponent;
Code setting the renderer/editor -
==================================
TableColumn column = colModel.getColumn(6);
button.setVisible(true);
button.setEnabled(true);
column .setCellRenderer(new ButtonRenderer());
column .setCellEditor(new ButtonCellEditor(button));
Please correct me where I am going wrong.
Thanks in advance!!Hope this is what you want...edit the column "Value" and type "Show" to get the desired result.
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
public class TableEdit2 extends JFrame
Object[] columns =
{ "A", "Value", "Action" };
Object[][] data =
{ "A0", "B0", "" },
{ "A1", "B1", "" },
{ "A2", "B2", "" },
{ "A3", "B3", "" },
{ "A4", "B4", "" },
{ "A5", "B5", "" },
{ "A6", "B6", "" },
{ "A7", "B7", "" },
{ "A8", "B8", "" },
{ "A9", "B9", "" },
{ "A10", "B10", "" },
{ "A11", "B11", "" } };
JTable table = null;
public TableEdit2()
super("Table Edit");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
createGUI();
setLocationRelativeTo(null);
setSize(400, 300);
setVisible(true);
private void createGUI()
table = new JTable(data, columns)
public void setValueAt(Object value, int row, int column)
super.setValueAt(value, row, column);
((AbstractTableModel) table.getModel()).fireTableRowsUpdated(
row, row);
table.getColumn("Action").setCellRenderer(new ButtonRenderer());
table.getColumn("Action").setCellEditor(new MyTableEditor(new JTextField()));
JScrollPane sc = new JScrollPane(table);
add(sc);
class ButtonRenderer extends DefaultTableCellRenderer
JButton undoButton = new JButton("Undo");
public ButtonRenderer()
super();
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus, int row,
int column)
Component comp = super.getTableCellRendererComponent(table, value,
isSelected, hasFocus, row, column);
if (column == 2)// The Action Column
Object checkValue = table.getValueAt(row, 1);
if ("Show".equals(String.valueOf(checkValue)))
return undoButton;
return comp;
class MyTableEditor extends DefaultCellEditor
JButton undoButton = new JButton("Undo");
public MyTableEditor(JTextField dummy)
super(dummy);
setClickCountToStart(0);
undoButton.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
JOptionPane.showMessageDialog(null, "Do your Action Here");
public Component getTableCellEditorComponent(JTable table,
Object value, boolean isSelected, int row, int column)
Component comp = super.getTableCellEditorComponent(table, value, isSelected, row, column);
if (column == 2)// The Action Column
Object checkValue = table.getValueAt(row, 1);
if ("Show".equals(String.valueOf(checkValue)))
return undoButton;
return comp;
public Object getCellEditorValue()
return "";
* @param args
public static void main(String[] args)
// TODO Auto-generated method stub
new TableEdit2();
} -
How at add closd function in the JButton??
Hi, sir:
I hope to add a closd function in the JButton, ie, like a JPanel or JFrame, there is a "X" sign icon on the right upper coner, when we click this X sign,
whole window or JPanel or JFrame will be closed, here I hope to add a "x" sign in JButton, when I click it, itthis button b2 will be vanished.
I update following code, but looks like not work, I hope Text and its icon on the leading Left, but closed sign is on the extreme end of right.
Can guru help??
Thanks
import javax.swing.AbstractButton;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.ImageIcon;
import javax.swing.SwingConstants;
import javax.swing.GroupLayout.Alignment;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
* ButtonDemo.java requires the following files:
* images/right.gif
* images/middle.gif
* images/left.gif
public class ButtonDemo2 extends JPanel implements ActionListener {
protected JButton b2,bclosed;
public ButtonDemo2() {
Icon closedIcon = new ImageIcon("images/ActionButton/closed.PNG");
ImageIcon middleButtonIcon = new ImageIcon("images/little.gif");
JLabel label1 = new JLabel("Image and Text", middleButtonIcon, JLabel.CENTER);
bclosed = new JButton(closedIcon);
bclosed.setBorder(null);
bclosed.setToolTipText("closed");
b2 = new JButton("Middle button", middleButtonIcon);
b2.setText("Middle button");
b2.setVerticalTextPosition(AbstractButton.BOTTOM);
b2.add(bclosed, -1);
b2.setIcon(middleButtonIcon);
b2.setHorizontalTextPosition(AbstractButton.LEFT);
b2.setAlignmentX(LEFT_ALIGNMENT);
b2.setMnemonic(KeyEvent.VK_M);
b2.setToolTipText("This middle button does nothing when you click it.");
//Add Components to this container, using the default FlowLayout.
add(label1);
add(b2);
public void actionPerformed(ActionEvent e) {
if ("disable".equals(e.getActionCommand())) {
b2.setEnabled(false);
} else {
b2.setEnabled(true);
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("ButtonDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
ButtonDemo2 newContentPane = new ButtonDemo2();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
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();
}Thanks, I add as follows:
package a.border;
import javax.swing.AbstractButton;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.ImageIcon;
import javax.swing.SwingConstants;
import javax.swing.GroupLayout.Alignment;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
* ButtonDemo.java requires the following files:
* images/right.gif
* images/middle.gif
* images/left.gif
public class ButtonDemo2 extends JPanel implements ActionListener {
protected JButton b2,bclosed;
public ButtonDemo2() {
Icon closedIcon = new ImageIcon("images/ActionButton/closed.PNG");
ImageIcon middleButtonIcon = new ImageIcon("images/little.gif");
JLabel label1 = new JLabel("Image and Text", middleButtonIcon, JLabel.CENTER);
bclosed = new JButton(closedIcon);
bclosed.setBorder(null);
bclosed.setToolTipText("closed");
bclosed.setActionCommand("closed");
b2 = new JButton("Middle button", middleButtonIcon);
b2.setText("Middle button");
b2.setVerticalTextPosition(AbstractButton.BOTTOM);
b2.add(bclosed, -1);
b2.setIcon(middleButtonIcon);
b2.setHorizontalTextPosition(AbstractButton.LEFT);
b2.setAlignmentX(LEFT_ALIGNMENT);
b2.setMnemonic(KeyEvent.VK_M);
bclosed.addActionListener(this);
b2.setToolTipText("This middle button does nothing when you click it.");
//Add Components to this container, using the default FlowLayout.
add(label1);
add(b2);
public void actionPerformed(ActionEvent e) {
if ("disable".equals(e.getActionCommand())) {
b2.setEnabled(!b2.isEnabled());
if ("closed".equals(e.getActionCommand())) {
System.out.println("OK closed is pressed");
remove(b2);
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("ButtonDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
ButtonDemo2 newContentPane = new ButtonDemo2();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
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();
}But I cannot see the First Image I add in b2 such as little.gif and "Image and Text" on it, only I can see bclosed icon.
what is wrong here??
Thanks a lot
Good weekend -
Setenabled works but not on panel initialization
I have a panel with several components.
I have 2 radio buttons that control some logic, and depending on which radio button is selected, different components are enabled
I have a listener that fires for the radio buttons, and the application seems to work correctly at run time,
so that the right conmponents do get enabled and disabled when the buttons are manually clicked.
My problem though is that I need to set which one is enabled by default upon initialization,
but calling setEnabled(false) does not seem to have any effect in my initialization code,
but it does work when called from the listeners when each radio button is clicked.
I dont have a easy example to post as the class is pretty big...
I'm just checking if there is anything obvious to look for?
Edited by: dingfelder on Apr 1, 2008 11:38 AMFor instance, this is an SSCCE of sorts that does nothing but enables and disables JPanels on pressing a JRadioButton. It defaults to the middle button being selected:
import java.awt.Component;
import java.awt.GridLayout;
import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
class FuSwing1 extends JPanel
private static final int BTN_COUNT = 3;
private JRadioButton[] rBtns = new JRadioButton[BTN_COUNT];
private JPanel[] btnPnls = new JPanel[BTN_COUNT];
FuSwing1()
setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
ButtonGroup btnGrp = new ButtonGroup();
for (int i = 0; i < rBtns.length; i++)
rBtns[i] = new JRadioButton("Radio Button " + (i + 1));
btnGrp.add(rBtns);
JPanel panel = new JPanel();
panel.add(rBtns[i]);
btnPnls[i] = createBtnPanel();
if (i == BTN_COUNT / 2) // select middle button on startup
btnPnls[i].setEnabled(true);
rBtns[i].setSelected(true);
else
btnPnls[i].setEnabled(false);
btnPnls[i].setBorder(BorderFactory.createTitledBorder("Button Panel " + (i + 1)));
panel.add(btnPnls[i]);
final int index = i;
rBtns[i].addChangeListener(new ChangeListener()
public void stateChanged(ChangeEvent e)
JRadioButton rBtn = (JRadioButton)e.getSource();
if (rBtn.isSelected())
btnPnls[index].setEnabled(true);
else
btnPnls[index].setEnabled(false);
add(panel);
private JPanel createBtnPanel()
JPanel bp = new JPanel()
@Override // since panels don't disable children by default
public void setEnabled(boolean enabled)
Component[] components = getComponents();
for (Component component : components)
component.setEnabled(enabled);
super.setEnabled(enabled);
bp.setLayout(new GridLayout(0, 2, 20, 20));
for (int i = 0; i < 4; i++)
JButton btn = new JButton("Button " + i);
bp.add(btn);
return bp;
private static void createAndShowGUI()
JFrame frame = new JFrame("FuSwing1 Application");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new FuSwing1());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
public static void main(String[] args)
javax.swing.SwingUtilities.invokeLater(new Runnable()
public void run()
createAndShowGUI(); -
Problem AbstractAction - JButton.setRolloverIcon()
Hi,
Since i (and i don't understand why) couldn't really find anything in google, or in this forum search, i'm requesting you guys' help
Here's a brief description of the problem:
When just using a JButton (with some text on it), without any Actions assigned to it, it's no problem at all to assign a disabledIcon, rolloverIcon (setDisabledIcon, setRolloverIcon) to the button.
BUT
once you apply an action class to it (in my case i'm extending my action class from AbstractAction), things go wrong:
- Apparently, you CAN pass on an Icon (the default icon on the image) to the action class, and then calling the super(String command, Icon icon) constructor.
- But how to set a disabledIcon or rolloverIcon using this action class ? You can't pass this on the the super constructor like the default icon. I'm really not seeing what i 'm doing wrong here :-(
Thanks in advance for your replies and help,
Regards,
Sander
PS: i'm new to this forum, if i'm giving you guys to little information, please let me know.but using action isn't the best idea. The benefit of using an Action is that it can be shared by multiple components. A typical GUI design would have a menu item and a toolbar button to invoke the same action. The coding is easy:
Action someAction = new SomeAction(...);
JMenuItem someItem = new JMenuItem( someAction );
JButton someButton = new JButton( someAction );
If you ever need to disable the Action you would do:
someAction.setEnable( false );
and the menu item and toolbar button would both be updated.
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