Java Example Program / Sample Source Code
import java.awt.*;
import java.awt.event.*;
public class FocusListenerExample {
Label label;
public FocusListenerExample() {
Frame frame = new Frame();
Button Okay = new Button("Okay");
Button Cancel = new Button("Cancel");
Okay.addFocusListener(new MyFocusListener());
Cancel.addFocusListener(new MyFocusListener());
frame.add(Okay, BorderLayout.NORTH);
frame.add(Cancel, BorderLayout.SOUTH);
label = new Label();
frame.add(label, BorderLayout.CENTER);
frame.setSize(450, 400);
frame.setVisible(true);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent we) {
System.exit(0);
}
});
}
public class MyFocusListener implements FocusListener {
public void focusGained(FocusEvent fe) {
Button button = (Button) fe.getSource();
label.setText(button.getLabel());
}
@Override
public void focusLost(FocusEvent arg0) {
System.out.println("focusLost");
}
}
public static void main(String[] args) {
new FocusListenerExample();
}
} |
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