JTabbedPanelDemo.java

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

class Panel1 extends JPanel {
    Panel1() {
        FlowLayout f1 = new FlowLayout();
        setLayout(f1);
        JButton b1 = new JButton("OK");
        JButton b2 = new JButton("CANCEL");
        JButton b3 = new JButton("RETRY");
        add(b1);
        add(b2);
        add(b3);
    }
}

class Panel2 extends JPanel {
    Panel2() {
        FlowLayout f1 = new FlowLayout();
        setLayout(f1);
        JButton b1 = new JButton("INDIA");
        JButton b2 = new JButton("US");
        JButton b3 = new JButton("UK");
        add(b1);
        add(b2);
        add(b3);
    }
}

class Panel3 extends JPanel {
    Panel3() {
        FlowLayout f1 = new FlowLayout();
        setLayout(f1);
        JButton b1 = new JButton("PUNE");
        JButton b2 = new JButton("SOLAPUR");
        JButton b3 = new JButton("MURTIZAPUR");
        add(b1);
        add(b2);
        add(b3);
    }
}

class JTabbedPaneDemo extends JFrame {
    JTabbedPaneDemo() {
        Container c = getContentPane();
        JTabbedPane jtp = new JTabbedPane();
        
        // Create panels for tabs
        Panel1 jp1 = new Panel1();
        Panel2 jp2 = new Panel2();
        Panel3 jp3 = new Panel3();
        
        // Add tabs to JTabbedPane
        jtp.addTab("TAB1", jp1);
        jtp.addTab("TAB2", jp2);
        jtp.addTab("TAB3", jp3);
        
        // Add JTabbedPane to content pane
        c.add(jtp);
    }

    public static void main(String args[]) {
        JTabbedPaneDemo f1 = new JTabbedPaneDemo();
        f1.setVisible(true);
        f1.setTitle("VJTech Frame");
        f1.setSize(500, 500);
        f1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}