how to use JInternalFrame in java?

JInternalFrame is a lightweight object that provides many of the features of a native frame, including dragging, closing, becoming an icon, resizing, title display, and support for a menu bar. Generally, JInternalFrames are added to a JDesktopPane.

To use JInternalFrame using program:-

 UseInternalFrm.java

import javax.swing.*;



import java.awt.event.*;

import java.awt.FlowLayout;

class UseInternalFrm extends JFrame

{

JButton btn;

JDesktopPane deskTop;

UseInternalFrm()

{

super("JInternalFrame"); //setTitle("JInternalFrame");

deskTop=new JDesktopPane();

setContentPane(deskTop);

setLayout(null);

btn=new JButton("JInternalFrame");

add(btn);

btn.setBounds(200,70,140,30);

btn.addActionListener(new ActionListener(){  //anonymous inner classes

public void actionPerformed(ActionEvent e)

{

 if(e.getSource()==btn)

 {

 InternalFrm frm=new InternalFrm();

 deskTop.add(frm);

 frm.setLocation(250,140);

      }

}   });   



setBounds(150,200,600,550);

setVisible(true);

setDefaultCloseOperation(EXIT_ON_CLOSE);

}

public static void main(String arg[])

{

new UseInternalFrm();

}



}//close of class UseInternalFrm

 InternalFrm.java

import javax.swing.*;

class InternalFrm extends JInternalFrame

{

InternalFrm()

{

super("JInternalFrame",false,true,false,true);  //super("string title",boolean resizable,boolean frame_close,boolean frame_maximize,boolean frame_minimize)

JLabel jlb=new JLabel("Showing Label");

add(jlb);

setVisible(true);

setBounds(150,200,300,250);

}

}//close of class InternalFrm

Here is the Output:-