How to get information from console during application is running

Hi there,

I am new to Java application development.

I am using ImageJ commands to process images in a java application.

ImageJ methode's errors appear only in the GUI.

As I don't have a GUI for my application, I can redirect the error message to the console.

My question is :

How to get these error messages from the console and treat them during the Application is running ?

Example of error in console :
Code :

Plugin or class not found: "application.Home_Made" (java.lang.ClassNotFoundException: application.Home_Made) 2012-08-13 08:27:25,090 [enerContainer-1] INFO UserDao - UserDao - findUser 2012-08-13 08:27:25,097 [enerContainer-1] INFO FileRepository - Generating input file: 96b65ff1/a70c/47ea/acd8/26a3c36dcd98/sfsdfsdfsdscivil.jpg
I would like to catch the error that "application.Home_Made" is unavailable.

Thank you very much in advance,

Best,