How to add Internal Frame to a JDesktopPane in Java?


At first, create a JDesktoPane −

JDesktopPane desktopPane = new JDesktopPane();

Now, create an Internal frame and add it to the JDesktopPane −

JInternalFrame intFrame = new JInternalFrame("Our Frame", true, true, true, true);
desktopPane.add(intFrame);
The following is an example to add Internal Frame to a JDesktopPane −
package my;
import java.awt.BorderLayout;
import javax.swing.JButton;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
public class SwingDemo {
   public static void main(final String[] args) {
      JFrame frame = new JFrame();
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      JDesktopPane desktopPane = new JDesktopPane();
      JInternalFrame intFrame = new JInternalFrame("Our Frame", true, true, true, true);
      desktopPane.add(intFrame);
      intFrame.setBounds(50, 90, 200, 250);
      JLabel label = new JLabel(intFrame.getTitle(), JLabel.CENTER);
      JButton button = new JButton("Demo Button");
      intFrame.add(label, BorderLayout.CENTER);
      intFrame.add(button, BorderLayout.WEST);
      intFrame.setVisible(true);
      frame.add(desktopPane, BorderLayout.CENTER);
      frame.setSize(600, 500);
      frame.setVisible(true);
   }
}

Output

The following is the result after clicking the maximize button on the above displayed Internal Frame −

Updated on: 30-Jul-2019

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