جافا : GUI برنامج لحساب الجمع والطرح والضرب من اعداد الطالبة المبدعة داليا قلالوة

import java.awt.GridLayout;

import java.awt.event.*;

import javax.swing.*;

public class MyGUI {

public static class GUI extends JFrame implements ActionListener{

JPanel myPanel;

JTextField number1 ; 

JTextField number2 ;

JLabel n1 ;

JLabel n2 ;

JLabel result ;

JLabel r ;

JButton add ;

JButton sub ;

JButton Mul;

public GUI(){

myPanel = new JPanel(new GridLayout(5 ,2, 20 ,20 ));

number1 = new JTextField(10);

number2 = new JTextField(10);

sub = new JButton("-");

add = new JButton("+");

Mul=new JButton("*");

result = new JLabel();

n1 = new JLabel("First number : ");

n2 = new JLabel("Second Number : ");

r = new JLabel("Result = ");

add.addActionListener(this);

sub.addActionListener(this);

Mul.addActionListener(this);

myPanel.add(n1);

myPanel.add(number1);

myPanel.add(n2);

myPanel.add(number2);

myPanel.add(r);

myPanel.add(result);

myPanel.add(add);

myPanel.add(sub);

myPanel.add(Mul);

this.add(myPanel);

}

public static void main(String[] args) {

GUI frame=new GUI();

frame.setTitle("Calculate");

frame.setSize(300,200);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

}

@Override

public void actionPerformed(ActionEvent event) {

if(event.getSource()==add){

int num1=Integer.parseInt(number1.getText());

int num2=Integer.parseInt(number2.getText());

int sum=num1+num2;

result.setText(""+sum);

}

if(event.getSource()==sub){

int num1=Integer.parseInt(number1.getText());

int num2=Integer.parseInt(number2.getText());

int sub=num1-num2;

result.setText(""+sub);

}

if(event.getSource()==Mul){

int num1=Integer.parseInt(number1.getText());

int num2=Integer.parseInt(number2.getText());

int Mul=num1*num2;

result.setText(""+Mul);

}

}

}

}