awt

package operacionesad;
import java.awt.*;
import java.awt.event.*;

public class Operacionesad
{
    Label L1,L2,L3;
    Button B1,B2, B3, B4;
    TextField T1, T2, T3;
    Frame F1;

    public void c1 ()
    {
    L1= new Label ("Número 1");
    L2= new Label ("Número 2");
    L3= new Label ("Resultado");
    T1= new TextField (20);
    T2= new TextField (20);
    T3= new TextField (20);

    // Botón de sumar
    B1= new Button ("+");
    B1.addActionListener(new ActionListener()
    {
        public void actionPerformed(ActionEvent e)
        {
            suma ();
        }
    });

    //Botón de restar
    B2= new Button ("-");
    B2.addActionListener(new ActionListener()
    {
        public void actionPerformed(ActionEvent e)
        {
            resta ();
        }
    });

    //Botón de multiplicar
    B3= new Button ("*");
    B3.addActionListener(new ActionListener()
    {
        public void actionPerformed(ActionEvent e)
        {
            multi ();
        }
    });

    //Botón de dividir
    B4= new Button ("/");
    B4.addActionListener(new ActionListener()
    {
        public void actionPerformed(ActionEvent e)
        {
            div ();
        }
    });

    F1= new Frame ("Operaciones");

    //Display
    F1.add(L1);
    F1.add(T1);
    F1.add(L2);
    F1.add(T2);
    F1.add(B1);
    F1.add(B2);
    F1.add(B3);
    F1.add(B4);
    F1.add(T3);


    F1.show();
    F1.setLayout(new FlowLayout ());
    F1.setSize(260, 150);
    F1.setResizable(false);
    }

    public void suma ()
    {
       String TT1, TT2, TT3;
       double a, b, c;
       //
       a= Double.parseDouble(TT1= T1.getText());
       b= Double.parseDouble(TT2= T2.getText());
       c= a+b;
       TT3= Double.toString(c);
       T3.setText(TT3);
    }

    public void resta ()
    {
       String TT1, TT2, TT3;
       double a, b, c;
       //
       a= Double.parseDouble(TT1= T1.getText());
       b= Double.parseDouble(TT2= T2.getText());
       c= a-b;
       TT3= Double.toString(c);
       T3.setText(TT3);
    }

    public void multi ()
    {
       String TT1, TT2, TT3;
       double a, b, c;
       //
       a= Double.parseDouble(TT1= T1.getText());
       b= Double.parseDouble(TT2= T2.getText());
       c= a*b;
       TT3= Double.toString(c);
       T3.setText(TT3);
    }

    public void div ()
    {
       String TT1, TT2, TT3;
       double a, b, c;
       //
       a= Double.parseDouble(TT1= T1.getText());
       b= Double.parseDouble(TT2= T2.getText());
       c= a/b;
       TT3= Double.toString(c);
       T3.setText(TT3);
    }

    public static void main(String[] args)
    {
        Operacionesad n=new Operacionesad();
        n.c1();
    }
}