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java.awt.ActionEvent problem

  Asked By: Adelina    Date: Nov 02    Category: Java    Views: 995
  

I create an instance of an inner class that implements ActionListener
create two JButtons and register the above instance for both.

when I do a call to java.awt.ActionEvent.getSource() I dont get
expected results code is below. If I press the ok button nothing
happens which is correct. But if I press the cancel button it should
execute System.exit(0). This does not happen any suggestions?

import java.io.*;
import java.util.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.Graphics;
import java.awt.*;

public class SamsInstaller implements Observer
{
JButton okbutton;
JButton cnbutton;
JFrame installerFrame;
JPanel installPanel;
JPanel installContentPane;
InstallListener instlisnr;

public SamsInstaller()
{
}
public void update(Observable o, Object str)
{
}
public void showInstaller()
{
JFrame installerFrame = new JFrame("SAMS9 DIICOE Installer");
JPanel installContentPane = new JPanel();
JPanel installPanel = new JPanel();
JButton okbutton = new JButton("OK");
JButton cnbutton = new JButton("CANCEL");
instlisnr = new InstallListener();

okbutton.addActionListener(instlisnr);
cnbutton.addActionListener(instlisnr);

installerFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
installPanel.setLayout(new BoxLayout
(installPanel,BoxLayout.X_AXIS));
installPanel.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder("SAMS9 DIICOE Installation"),
BorderFactory.createEmptyBorder(5,5,5,5)));


installPanel.add(okbutton);
installPanel.add(cnbutton);
installContentPane.setOpaque(true);
installContentPane.add(installPanel);
installerFrame.setContentPane(installContentPane);
installerFrame.setSize(300,300);
installerFrame.setVisible(true);
}
public static void main(String[] args)
{
SamsInstaller installerInstance = new SamsInstaller();
installerInstance.showInstaller();
}

class InstallListener implements ActionListener {

public void actionPerformed(ActionEvent event) {

if (event.getSource().equals(cnbutton))
{
System.exit(0);
}
}

}

}

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2 Answers Found

 
Answer #1    Answered By: Dustin Dean     Answered On: Nov 02

How about changing the actionPerformed code...

public void  actionPerformed(ActionEvent ae) {
JButton btn = (JButton) ae.getSource();

if (btn == cnbutton) {
....
} else if (btn == okbutton) {
...
}
}

 
Answer #2    Answered By: Ruairidh Anderson     Answered On: Nov 02

I fixed the issue by putting all the code  in the constructor for the
class SamsInstaller.

 
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