🚀 go-pugleaf

We have developped a big applet(product) with Jdk 1.2 (Swing 1.1)
with a lot of JInternal Frame. As we open the JInternal Frame and
close them : THE MEMORY IS NEVER RELEASED and raises therefore.
We must close Netscape and rerun the applet all 5mn

There is a sample applet code there show the problem using jdk 1.2

package untitled12;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

public class Test extends JApplet {
  boolean isStandalone = false;
  int counter = 1;
  JButton makeButton = new JButton("Make");
  JButton clearButton = new JButton("Clear");
  JPanel buttonPanel = new JPanel();
  JDesktopPane displayPanel = new JDesktopPane();

  public Test() {
  }
  public void init() {
    try {
    jbInit();
    }
    catch (Exception e) {
    e.printStackTrace();
    }
  }

  private void jbInit() throws Exception {
    this.setSize(400, 300);
    this.getContentPane().setLayout(new BorderLayout());
    makeButton.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button_actionPerformed(e);
      }
    });
    clearButton.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        clearButton_actionPerformed(e);
      }
    });
    this.getContentPane().add(buttonPanel, BorderLayout.NORTH);
    this.getContentPane().add(displayPanel, BorderLayout.CENTER);
    buttonPanel.setLayout(new BorderLayout());
    buttonPanel.add(makeButton, BorderLayout.WEST);
    buttonPanel.add(clearButton, BorderLayout.EAST);
  }
  void button_actionPerformed(ActionEvent e) {
    for (int i = 0; i <= 9; i++) {
      JInternalFrame frame = new JInternalFrame("Frame #" + counter++, false,
false, false, false);
      JButton frameButton = new JButton("Frame button");
      frame.getContentPane().add(frameButton);
      displayPanel.add(frame);
      frame.pack();
      frame.show();
    }
  }

  void clearButton_actionPerformed(ActionEvent e) {
    JInternalFrame list[] = displayPanel.getAllFrames();
    for (int i = 0; i < list.length; i++)
      list[i].dispose();
    displayPanel.repaint();
    counter = 1;
  }
}