Java Programming//Small Calculater

javax.swing.*;
import java.awt.event.*;
public class Example extends JFrame{
JLabel l1,l2,l3,l4;
JTextField t1,t2;
JButton b1;

public Example() {}
public Example(String s)
{
super(s);
}
public void setComponents()
{
l1=new JLabel("Addition of two number");
l2=new JLabel("First Number");
l3=new JLabel("second number");
l4=new JLabel();
t1=new JTextField();
t2=new JTextField();
b1=new JButton("Add");
setLayout(null);
l1.setBounds(50,50,200,20);
l2.setBounds(50,80,100,20);
t1.setBounds(150,80,100,20);
l3.setBounds(50,130,100,20);
t2.setBounds(150,130,100,20);
b1.setBounds(80,180,100,20);
l4.setBounds(50,240,200,20);
b1.addActionListener(new Handler());
add(l1);
add(l2);
add(t1);
add(l3);
add(t2);
add(b1);
add(l4);
}
class Handler implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
int a=Integer.parseInt(t1.getText());
int b=Integer.parseInt(t2.getText());
int s=a+b;
l4.setText("Result is"+s);
}
}
public static void main(String[] agrs)
{
Example jf=new Example("swing Example");
jf.setComponents();


jf.setSize(300,300);
jf.setVisible(true);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

}