/*
* [MultiInstance.java]
*
* Summary: Demonstrate AppletContext.getApplets bug which fails for more than 11 instances.
*
* Copyright: (c) 2014-2017 Roedy Green, Canadian Mind Products, http://mindprod.com
*
* Licence: This software may be copied and used freely for any purpose but military.
* http://mindprod.com/contact/nonmil.html
*
* Requires: JDK 1.8+
*
* Created with: JetBrains IntelliJ IDEA IDE http://www.jetbrains.com/idea/
*
* Version History:
* 1.0 2001-03-08 initial
*/
package com.mindprod.example;
import javax.swing.JApplet;
import javax.swing.JButton;
import java.applet.Applet;
import java.applet.AppletContext;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Enumeration;
import static java.lang.System.*;
// with 12+ instances FireFox, Opera and IE fail. Applets cannot see the other Applets.
// Chrome fails with 13+ instances.
// With Chrome, ironically fails on 12+ instances.
// simple jar build: jar -cvfm multi.jar manifest.mf \com\mindprod\example\MultiInstance*.class
// manifest.mf looks like this:
// Manifest-Version: 1.0
// Application-Name: MultiInstance
// Permissions: sandbox
// Created-By: 1.8.0 (Oracle Corporation)
// Main-Class: com.mindprod.example.MultiInstance
// run with multi.html
//that looks like this:
//
//
//
//
//
//
//
Click each applet to see which others it can see, listed on the console.
//
//
//
//
// ... 11 instances will work, 12 will fail.
//
//
/**
* Demonstrate AppletContext.getApplets bug which fails for more than 11 instances.
*
* @author Roedy Green, Canadian Mind Products
* @version 1.0 2014-04-12 initial version
* @since 2014-04-12
*/
public final class MultiInstance extends JApplet
{
/**
* which instance on the page are we, unique string
*/
private String instance = "unknown";
/**
* constructor
*/
public MultiInstance()
{
}
/**
* which instance on the page are
*
* @return unique instance string
*/
String getInstance()
{
return instance;
}
/**
* dump out who can see what
*/
public void dump()
{
// dump out what getApplets provides
final AppletContext ac = this.getAppletContext();
// all Applets on page, possibly including us, including non-MultiInstance
final Enumeration