Understanding JDK 8 Applets: A Beginner's Guide

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Java Development Kit (JDK) 8 introduced significant changes to Java technology stack, including improvements in security features for web-based applications like applets. In this article, we'll explore what an applet is and how to successfully run one using the JDK 8 Applet Viewer.

What are Applets?

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An applet is a small standalone application that runs within a larger application or environment - typically a Java-enabled browser or applet viewer. Unlike full-fledged applications like desktop apps, applets have limited access to system resources and capabilities due in part to security restrictions designed for safety reasons when executed from untrusted sources over the internet.

To run an applet successfully on your local machine without needing a web server running J2EE containers such as GlassFish or Tomcat etc., you need:

1. Java Runtime Environment (JRE) 8 installed

Download and install it if not already done so here: https://www.oracle.com/java/technologies/jre-index.html

2. Set the classpath correctly before launching the applet viewer:

For Windows users, open Command Prompt as Administrator

Type `set CLASSPATH;C:\jre1.8_XX\lib` (replace 'C:' with your actual JDK installation path)

Press Enter and try running the Applet Viewer again.

3. If still facing issues after following above steps:

- Ensure that you have properly downloaded and extracted both jdk-8u_XX-windows-x64.exe & i586 versions of JDK from Oracle website.

- Re-install Java Development Kit by selecting 'Clean Up' option during the installation process.

Troubleshooting Tips

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1. If your applet does not load, check that you've correctly set up the classpath variable as described above:

* For Windows users: Right-click on 'Computer' or 'This PC', then select Properties > Advanced System > Environment Variables...

In User variables for 'YourUsername', double click 'CLASSPATH', append semicolon (&), followed by path to jre1.8_XX\lib folder.

2. Make sure that the latest version of Sun Applet Plugin is installed in your browser's extensions or plugins directory depending upon which web browsers you're using:

* Internet Explorer: Tools > Manage Add-ons (or Extension Manager for IE9+)

Look out specifically under 'ActiveX controls and plug-ins' section.

Note that starting from Java 7 onwards, ActiveX support has been deprecated in favor of new plugins like NPAPI or PPAPI.

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By following these simple steps outlined above, you should now be able to successfully run your applet application using the JDK 8 Applet Viewer on your local machine without any further problems. If issues persist despite trying all troubleshooting tips mentioned here please feel free to post more details so we can assist you better!

Jdk 8 applet viewer