Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;

public class Main extends JFrame {
    public Main() {
        JMenuBar bar = new JMenuBar();
        JMenu addMenu = new JMenu("Add");
        JMenuItem newFrame = new JMenuItem("Internal Frame");
        addMenu.add(newFrame);
        bar.add(addMenu);
        setJMenuBar(bar);

        final JDesktopPane theDesktop = new JDesktopPane();
        getContentPane().add(theDesktop);

        newFrame.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JInternalFrame frame = new JInternalFrame("Internal Frame", true, true, true, true);

                Container c = frame.getContentPane();
                MyJPanel panel = new MyJPanel();

                c.add(panel, BorderLayout.CENTER);
                frame.setSize(200, 200);
                frame.setOpaque(true);
                theDesktop.add(frame);
            }
        });

        setSize(500, 400);
        setVisible(true);
    }

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

class MyJPanel extends JPanel {
    public MyJPanel() {
        add(new JLabel("adf"));
    }

}