Question

I need to save console output from application, started via JNLP, to some file on user machine (for example, to examine verbose jvm output, or to do quick-and-dirty logging). The application is granted all permissions.

Is that possible?

Answer 1

There are some different scenarios:

1. If you have control over the Client machine executing the app, you can go with serg10’s example and enable traces in the control panel.

2. If you can change the code, you may use:

   System.setOut(new PrintStream(new FileOutputStream(fileName)));

3. To do logging to a file of your choise, use FileOutputStream with appender constructor:

http://docs.oracle.com/javase/6/docs/api/java/io/FileOutputStream.html#FileOutputStream%28java.io.File,%20boolean%29