How to Deploy a Java Applet for Modern Browsers?

What are the best practices to deploy a Java applet in today’s web browsers using applet, embed, and object tags?

Although Java applets were once a popular method for embedding interactive content in web pages, modern web browsers have phased out support for them due to security concerns. However, understanding the deployment process can still be beneficial for legacy systems or educational purposes. This guide provides a comprehensive approach to deploy Java applets using traditional HTML tags like <applet>, <embed>, and <object>.

<applet code='MyApplet.class' width='300' height='300'>
    Your browser does not support Java applets.
</applet>

<embed src='MyApplet.class' width='300' height='300'>

<object classid='java:MyApplet.class' width='300' height='300'>
    <param name='code' value='MyApplet.class'>
    <param name='archive' value='MyApplet.jar'>
    <param name='width' value='300'>
    <param name='height' value='300'>
</object>

<!-- Ensure to include appropriate Java Runtime Environment (JRE) links if necessary -->

Causes

• Deprecation of Java applet support in major browsers like Chrome and Firefox.
• Security risks associated with Java applet execution in browsers.
• Compatibility issues with modern web technologies.

Solutions

• Utilize an older version of browsers that still support Java applets, such as Internet Explorer.
• Consider migrating to modern alternatives like Java Web Start or HTML5-compatible technologies.
• If necessary, use a Java Plugin that can embed applets, but note this is not recommended due to security issues.

Mistake: Not including the necessary Java Runtime Environment (JRE) plugin for users.

Solution: Provide clear instructions or links for users to install the JRE.

Mistake: Using outdated HTML tags without a fallback approach.

Solution: Always provide alternative content or fallback methods for modern browsers.

Mistake: Assuming all users have Java enabled.

Solution: Prompt users with a Java detection script or message if Java is disabled.