How do I debug my Java source code that I am calling from the MATLAB environment?

I am calling Java classes in my MATLAB files and at the MATLAB command prompt using the MATLAB Java Interface. I would like to debug into the Java source code from my Java IDE (such as Eclipse or Intellij) as it is called from MATLAB.

Answer 1

[MathWorks Support Team]

In order to debug Java code being called from the MATLAB environment, use the following steps:

1. Relaunch MATLAB using the -jdb flag from a command prompt. For example:

matlab -jdb

(by default this flag will enable debugging support in the VM on port 4444)

2. You can either launch a Java debugger from a Java IDE such as Eclipse and Intellij, or call jdb from the system command prompt. MATLAB displays the message “JVM is being started with debugging enabled” and provides the appropriate information. For example:

jdb -connect com.sun.jdi.SocketAttach:port=4444

3. After attaching the debugger you will be able to set breakpoints as you normally would.