import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class D1 extends JPanel implements ActionListener
{
   JTextField left = new JTextField ();
   JTextField right = new JTextField ();
   JRadioButton plus = new JRadioButton("+");
   JRadioButton minus = new JRadioButton("-");
   JRadioButton multiple = new JRadioButton("*");
   JRadioButton divide = new JRadioButton("/");
   ButtonGroup group = new ButtonGroup();
   JLabel result = new JLabel ("Result = ");

   D1 ()
   {
      setLayout(new GridLayout(3, 2));
      JPanel groupPane = new JPanel();
      groupPane.setLayout (new GridLayout (1, 0));
      group.add(plus);
      group.add(minus);
      group.add(multiple);
      group.add(divide);
      groupPane.add(plus);
      groupPane.add(minus);
      groupPane.add(multiple);
      groupPane.add(divide);

      plus.addActionListener (this);
      minus.addActionListener (this);
      multiple.addActionListener (this);
      divide.addActionListener (this);
      add(left);
      add(groupPane);
      add(right);
      add(result);
   }

   public static void main(String[] args) 
   {
      JFrame frame = new JFrame ("Ejercicio 2");
      D1 pane = new D1();
      frame.getContentPane().add(pane, BorderLayout.CENTER);
      frame.addWindowListener (new WindowAdapter() {
        public void windowClosing (WindowEvent e)
        {
           System.exit(0);
        }
      } );
      
      frame.pack();
      frame.setVisible(true);
   }

   public void actionPerformed (ActionEvent e)
   {
      int a = Integer.parseInt (left.getText());
      int b = Integer.parseInt (right.getText());
      if (e.getSource() == plus)
         result.setText ("Resultado = " + (a+b));
      if (e.getSource() == minus)
         result.setText ("Resultado = " + (a-b));
      if (e.getSource() == multiple)
         result.setText ("Resultado = " + (a*b));
      if (e.getSource() == divide)
         result.setText ("Resultado = " + (a/b));
   }
}