Java Example Program / Sample Source Code
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Frame;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JOptionPane;
class ActionEventDemo {
public static void main(String args[]) {
Frame frame = new Frame("ActionEventDemo");
ActionListener buttonListener = new ButtonListener();
Button button1 = new Button("A");
Panel p = new Panel();
p.add(button1);
frame.add(button1, BorderLayout.NORTH);
button1.addActionListener(buttonListener);
frame.pack();
frame.setVisible(true);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
}
class ButtonListener implements ActionListener {
public void actionPerformed(ActionEvent event) {
String choice = event.getActionCommand();
JOptionPane.showMessageDialog(null, "You have clicked: " + choice);
}
} |
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