import java.awt.*;
import java.awt.event.*;
public class p1{
    Frame f;
    TextField t1,t2,t3;
    Button btnplus;
    p1(){
          f=new Frame("Button Example");

            t1=new TextField("");
            t1.setBounds(50,100, 200,30);
            t2=new TextField("");
             t2.setBounds(50,150, 200,30);

             t3=new TextField("");
             t3.setBounds(50,200, 200,30);

            f.add(t1); f.add(t2); f.add(t3);
            btnplus= new Button("+");
            btnplus.setBounds(50,250, 50,30);
            f.add(btnplus);
          f.setSize(400,400);
          f.setLayout(null);
          f.setVisible(true);
          f.addWindowListener( new WindowListener(){
            public  void windowClosed(WindowEvent e)
            {

            }
            public  void windowDeactivated(WindowEvent e)
            {
            }
            public  void windowActivated(WindowEvent e)
            {
            }
            public  void windowClosing(WindowEvent e)
            {
                f.dispose();
            }
            public  void windowDeiconified(WindowEvent e)
            {
            }
            public  void windowIconified(WindowEvent e)
            {
            }
            public  void windowOpened(WindowEvent e)
            {
            }
          });


          btnplus.addMouseListener(new MouseListener(){
            public  void mouseClicked(MouseEvent e)
            {
                //t1.setText("agsdfgds");
                int a=0,b=0,ans=0;
                a= Integer.valueOf(t1.getText());
                b= Integer.valueOf(t2.getText());
                ans=a+b;
                t3.setText(String.valueOf(ans));
            }
            public  void mouseEntered(MouseEvent e)
            {

            }
            public  void mouseExited(MouseEvent e)
            {

            }
            public  void mousePressed(MouseEvent e)
            {

            }
            public  void mouseReleased(MouseEvent e)
            {


            }

          });
    }



public static void main(String args[])
{
    new p1();
}

}