جافا : GUI برنامج ايجاد مساحة الدائرة ... اعداد الطالبة آلاء غانم

import java.awt.GridLayout;

import java.awt.event.*;

import javax.swing.*;

public class Areacircle {

public static class MyareaCircle extends JFrame implements ActionListener{

JPanel myPanel ;

JTextField radius ; 

JLabel r ;

JLabel area ;

JLabel result ;

JButton click ;

public MyareaCircle(){

myPanel = new JPanel(new GridLayout(4 ,2, 20 ,0 ));

radius = new JTextField(10);

click = new JButton("click");

area = new JLabel();

r = new JLabel(" Enter radius : ");

result = new JLabel(" Area = ");

click.addActionListener(this);

myPanel.add(r);

myPanel.add(radius);

myPanel.add(result);

myPanel.add(area);

myPanel.add(click);

this.add(myPanel);

}

public static void main(String[] args) {

MyareaCircle first=new MyareaCircle();

first.setTitle("areaCircle");

first.setSize(300,200);

first.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

first.setVisible(true);

}

@Override

public void actionPerformed(ActionEvent event) {

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

double r1 = Double.parseDouble(radius.getText()) ;

double a = r1 * r1 * 3.14;

area.setText(""+a);

}

}

}

}