JTabbedPane Java Example

import java.awt.*;

import javax.swing.*; 

import java.awt.event.*;

public class TAP1 extends JFrame implements ActionListener

{

        JLabel jlrad,jlare,jlcir,jls,jlp,jla;

        JTextField jtrad,jtare,jtcir,jts,jtp,jta;

        JButton jbcal1,jbexit1,jbcal2,jbexit2;

        JPanel circle,square,jpmain;

        TAP1()

        {       super("Tabbed Panes");

                setSize(200,200);

                jlrad=new JLabel("radius");

                jlare=new JLabel("area");

                jlcir=new JLabel("circunference");

                jtrad=new JTextField(10);

                jtare=new JTextField(10);

                jtcir=new JTextField(10);

                jbcal1=new JButton("Calculate");

                jbcal2=new JButton("Calculate");

                jbexit1=new JButton("Exit");

                jbexit2=new JButton("Exit");       

                jls=new JLabel("Side");

                jlp=new JLabel("Parameter");

                jla=new JLabel("Area");

                jts=new JTextField(10);

                jtp=new JTextField(10);

                jta=new JTextField(10);

                circle=new JPanel();

                square =new JPanel();

                jpmain=new JPanel();

                circle.setLayout(new GridLayout(4,2));

                square.setLayout(new GridLayout(4,2));

                circle.add(jlrad);circle.add(jtrad);

                circle.add(jlare);circle.add(jtare);

                circle.add(jlcir);circle.add(jtcir);

                circle.add(jbcal1);circle.add(jbexit1);

                square.add(jls);square.add(jts);

                square.add(jlp);square.add(jtp);

                square.add(jla);square.add(jta);

                square.add(jbcal2);square.add(jbexit2);

                jbcal1.addActionListener(this);

                jbexit1.addActionListener(this);

                jbcal2.addActionListener(this);

                jbexit2.addActionListener(this);

                JTabbedPane tab=new JTabbedPane();

                tab.addTab("Circle",circle);

                tab.addTab("Square",square);

                jpmain.setLayout(new BorderLayout());

                jpmain.add(tab);

                jpmain.setSize(100,100);

                setContentPane(jpmain);

                setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                setVisible(true);

        }

        public void actionPerformed(ActionEvent e)

        {       double temp1,area,peri;

                JButton sou=new JButton();

                sou=(JButton)(e.getSource());

                if(sou==jbexit1 || sou==jbexit2)

                {

                        System.exit(0);

                }

                else

                        if(sou==jbcal1)

                        {

                                temp1=Double.parseDouble(jtrad.getText());

                                area=3.14*temp1*temp1;

                                jtare.setText(""+area);

                                peri=2*3.14*temp1;

                                jtcir.setText(""+peri);

                        }

                        else

                        {

                                temp1=Double.parseDouble(jts.getText());

                                area=temp1*temp1;

                                jta.setText(""+area);

                                peri=4*temp1;

                                jtp.setText(""+peri);

                        }

        }

        public static void main(String arguments[])

        {

                TAP1 aa=new TAP1();

        }

                     

}