JButton class:

The JButton class is used to create a button that have plateform-independent implementation.

Commonly used Constructors:

• JButton(): creates a button with no text and icon.
• JButton(String s): creates a button with the specified text.
• JButton(Icon i): creates a button with the specified icon object.

Commonly used Methods of AbstractButton class:

1) public void setText(String s): is used to set specified text on button.

2) public String getText(): is used to return the text of the button.

3) public void setEnabled(boolean b): is used to enable or disable the button.

4) public void setIcon(Icon b): is used to set the specified Icon on the button.

5) public Icon getIcon(): is used to get the Icon of the button.

6) public void setMnemonic(int a): is used to set the mnemonic on the button.

7) public void addActionListener(ActionListener a): is used to add the action listener to this object.

Note: The JButton class extends AbstractButton class.

Example of displaying image on the button:

1.    import java.awt.event.*;  

2.    import javax.swing.*;  

3.      

4.    public class ImageButton{  

5.    ImageButton(){  

6.    JFrame f=new JFrame();  

7.                      

8.              

9.    JButton b=new JButton(new ImageIcon("b.jpg"));  

10. b.setBounds(130,100,100, 40);  

11.       

12. f.add(b);  

13.           

14. f.setSize(300,400);  

15. f.setLayout(null);  

16. f.setVisible(true);  

17.           

18. f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  

19.           

20.     }  

21.       

22. public static void main(String[] args) {  

23.     new ImageButton();  

24. }  

25. }