Debugging Java Applets in IntelliJ IDEA

Posted by Gjermund Bjaanes on January 14, 2015

Ever had the misfortune of having to debug Java Applets in combination with a web app?

I recently did, and I thought I might as well share some tips on debugging them in IntelliJ IDEA.

Enable Remote Debugging in Java Plugin

Open Java Control Panel and go to “Java” tab and the click “View”.

Java Control

 

In “Java Runtime Parameters” add the following line (one line):

-Djava.compiler=NONE -Xnoagent -Xdebug -Xrunjdwp:transport=dt_socket,address=2502,server=y,suspend=n

(Note, the address can be anything you want it to be, I used 2502)

Jave Environment Settings

 

Add a remote Run Configuration in IntelliJ IDEA

In the menu select “Run” and select “Edit Configurations…”

Click the Plus sign and Select “Remote”

Add Remote Run Configuration

 

Change the “Port” number to 2502 (or whatever you picked in while enabling remote debugging in the Java Plugin) and select a name for your run configuration.

Remote Run Configuration

 

Debug

Now you are ready to debug. Start up your Applet and then run your new configuration (“Run” and “Name Of Your Run Configuration”

 

Credit for this information goes to:

http://www.nakov.com/blog/2008/08/20/debugging-java-applets-in-eclipse/

Follow me on Twitter: @gjermundbjaanes