Java AWT Button, Label

Java AWT Button

The button class is used to create a labeled button that has platform independent implementation. The application result in some action when the button is pushed.

AWT Button Class declaration

1. public class Button extends Component implements Accessible  

Java AWT Button Example

1. import java.awt.*;  
2. public class ButtonExample {  
3. public static void main(String[] args) {  
4.     Frame f=new Frame("Button Example");  
5.     Button b=new Button("Click Here");  
6.     b.setBounds(50,100,80,30);  
7.     f.add(b);  
8.     f.setSize(400,400);  
9.     f.setLayout(null);  
10.     f.setVisible(true);   
11. }  
12. }  

Java AWT Button Example with ActionListener

1. import java.awt.*;  
2. import java.awt.event.*;  
3. public class ButtonExample {  
4. public static void main(String[] args) {  
5.     Frame f=new Frame("Button Example");  
6.     final TextField tf=new TextField();  
7.     tf.setBounds(50,50, 150,20);  
8.     Button b=new Button("Click Here");  
9.     b.setBounds(50,100,60,30);  
10.     b.addActionListener(new ActionListener(){  
11.     public void actionPerformed(ActionEvent e){  
12.             tf.setText("Welcome to Javatpoint.");  
13.         }  
14.     });  
15.     f.add(b);f.add(tf);  
16.     f.setSize(400,400);  
17.     f.setLayout(null);  
18.     f.setVisible(true);   
19. }  
20. }  

ava AWT Label

The object of Label class is a component for placing text in a container. It is used to display a single line of read only text. The text can be changed by an application but a user cannot edit it directly.

AWT Label Class Declaration

1. public class Label extends Component implements Accessible  

Java Label Example

1. import java.awt.*;  
2. class LabelExample{  
3. public static void main(String args[]){  
4.     Frame f= new Frame("Label Example");  
5.     Label l1,l2;  
6.     l1=new Label("First Label.");  
7.     l1.setBounds(50,100, 100,30);  
8.     l2=new Label("Second Label.");  
9.     l2.setBounds(50,150, 100,30);  
10.     f.add(l1); f.add(l2);  
11.     f.setSize(400,400);  
12.     f.setLayout(null);  
13.     f.setVisible(true);  
14. }  
15. }  

Java AWT Label Example with ActionListener

1. import java.awt.*;  
2. import java.awt.event.*;  
3. public class LabelExample extends Frame implements ActionListener{  
4.     TextField tf; Label l; Button b;  
5.     LabelExample(){  
6.         tf=new TextField();  
7.         tf.setBounds(50,50, 150,20);  
8.         l=new Label();  
9.         l.setBounds(50,100, 250,20);      
10.         b=new Button("Find IP");  
11.         b.setBounds(50,150,60,30);  
12.         b.addActionListener(this);    
13.         add(b);add(tf);add(l);    
14.         setSize(400,400);  
15.         setLayout(null);  
16.         setVisible(true);  
17.     }  
18.     public void actionPerformed(ActionEvent e) {  
19.         try{  
20.         String host=tf.getText();  
21.         String ip=java.net.InetAddress.getByName(host).getHostAddress();  
22.         l.setText("IP of "+host+" is: "+ip);  
23.         }catch(Exception ex){System.out.println(ex);}  
24.     }  
25.     public static void main(String[] args) {  
26.         new LabelExample();  
27.     }  
28. }  

Anurag Rana