import java.io.*;
import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class MainFrame extends JFrame implements ActionListener{
    public String cmd;
    JFrame mf=new JFrame();
    JPanel p1=new JPanel();
    JPanel p2=new JPanel();
    JPanel p3=new JPanel();

    JButton b11=new JButton("add");
    JButton b12=new JButton("del");

    JTextField t2=new JTextField("add");
    JButton b2=new JButton("Ok");


    JTextField t3=new JTextField("del");
    JButton b3=new JButton("OK");
    public void init(){

        p1.add(b11);
        p1.add(b12);
        b11.addActionListener(this);
        b12.addActionListener(this);
        mf.add(p1);

//mf.setVisible(true);

        p2.add(t2);
        p2.add(b2);
//        t2.addActionListener(this);

        b2.addActionListener(this);

        p3.add(t3);
        p3.add(b3);
//        t3.addActionListener(this);
        b3.addActionListener(this);

        mf.pack();
        mf.setLocationRelativeTo(null);
        mf.setVisible(true);
        mf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public void actionPerformed(ActionEvent e) {
        String cmd=e.getActionCommand();

        if(e.getSource()==b11){
             add();
        }
        if(e.getSource()==b12){
             del();
        }
        if(e.getSource()==b2){
             System.out.println("Adding is OK");
        }
    }
    private void del() {
        System.out.println("Del");
        mf.add(p3);
        p1.setVisible(false);
        p3.setVisible(true);
        if(cmd=="ok"){
            System.out.println("Deling is OK");
        }
    }

    private void add(){
        System.out.println("Add");
        mf.add(p2);
        p1.setVisible(false);
        p2.setVisible(true);


    }
    public static void main(String args[]){
        MainFrame book=new MainFrame();
        book.init();
    }



}