1) The JButton and JLabel Swing Demonstration Program.

source file name:  ButtonLabelDemo.java

 import java.awt.event.*;  

import javax.swing.*;    

class ButtonLabelDemo extends JFrame implements ActionListener

{

JLabel txtlb;  

public ButtonLabelDemo()

{

    setLayout(null);  

JButton bt=new JButton("Click");  

     txtlb=new JLabel();  

    bt.setBounds(50,50, 100,30);  

     txtlb.setBounds(50,100,250,30);  

add(bt);add(txtlb);  

    bt.addActionListener(this);

}

  public void actionPerformed(ActionEvent e)

{  

            txtlb.setText("Welcome to Java Programming");  

  }  

  public static void main(String[] args)

 {  

    ButtonLabelDemo f=new ButtonLabelDemo();

f.setTitle(" Swing Label & Button program");  

    f.setSize(400,400);  

    f.setVisible(true);   

}  

}  

output: