Sample Program Event Handling in Java

In the following example is added confirmation window when exit button is pressed.

The following looks:


 

Examples of programs:

01	import java.awt.*;

02

03	import java.awt.event.*;

04

05	import javax.swing.*;

06

07	public class ClickMe3 extends JFrame {

08

09	private JButton tombol, btnExit;

10

11	public ClickMe3() {

12

13	super ("Event Handling");

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15	Container container = getContentPane();

16

17	container.setLayout(new FlowLayout());

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19	ClickListener cl = new ClickListener ();

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21	tombol = new JButton ("Click Me!");

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23	tombol.addActionListener(cl);

24

25	container.add(tombol);

26

27	btnExit = new JButton ("Exit");

28

29	btnExit.addActionListener(cl);

30

31	container.add(btnExit);

32

33	setSize (200,100);

34

35	setVisible (true);

36

37

}

38

39	public static void main (String arg[]) {

40

41	ClickMe3 test = new ClickMe3();

42

43	test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

44

45

}

46

47	//inner class

48

49	private class ClickListener implements ActionListener {

50

51	public void actionPerformed (ActionEvent e) {

52

53	if (e.getSource() == tombol) {

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55	JOptionPane.showMessageDialog(null, "You click me again, guys !!!");

56

57	} else if (e.getSource() == btnExit){

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59	if ( JOptionPane.showConfirmDialog(null, "Apakah Anda yakin akan keluar ?","Konfirmasi",

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61	JOptionPane.OK_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE) == JOptionPane.OK_OPTION) {

62

63	System.exit(0);

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65

}

66

67

}

68

69

}

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71

}

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73

}