Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class Main extends JFrame {
    public Main() {
        JPanel parentPanel = new JPanel();
        parentPanel.setLayout(new BorderLayout(10, 10));

        JPanel childPanel1 = new JPanel();
        childPanel1.setBackground(Color.red);
        childPanel1.setPreferredSize(new Dimension(300, 40));

        JPanel childPanel2 = new JPanel();
        childPanel2.setBackground(Color.blue);
        childPanel2.setPreferredSize(new Dimension(800, 600));

        JButton myButton = new JButton("Add Component ");
        myButton.addActionListener(e -> {
            parentPanel.remove(childPanel1);
            parentPanel.add(childPanel2, BorderLayout.CENTER);
            parentPanel.revalidate();
            parentPanel.repaint();
            pack();
        });
        setLocation(10, 200);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        parentPanel.add(childPanel1, BorderLayout.CENTER);
        parentPanel.add(myButton, BorderLayout.SOUTH);
        add(parentPanel);
        pack();
        setVisible(true);
    }

    public static void main(String[] args) {
        new Main();
    }
}