-
Notifications
You must be signed in to change notification settings - Fork 0
/
jfocuslistener.java
56 lines (40 loc) · 1.12 KB
/
jfocuslistener.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
/** here are two method which we have to override*/
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class myframe extends JFrame implements FocusListener
{
Container c;
JTextField tf= new JTextField("hy");
JTextArea area = new JTextArea();
myframe()//create a constructor of class
{
c=this.getContentPane();
c.setLayout(null);
this.addFocusListener(this);
tf.setBounds(50,50,150,40);
area.setBounds(50,100,450,400);
tf.addFocusListener(this);
c.add(tf);
c.add(area);
}
public void focusGained(FocusEvent e)
{
area.append("focus gained \n");
}
public void focusLost(FocusEvent e)
{
area.append("focus lost \n");
}
}
public class jfocuslistener
{
public static void main(String[] args)
{
myframe frame=new myframe();
frame.setTitle("Action demo");
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setBounds(300,200,1000,500);//(left,top,width,height);
}
}