Question

I have a Swing application as jar file.

I am launching the application in 2 ways.

1. In command prompt java -jar app.jar. launching & Working fine.

2. double click app.jar. launching, but not working properly as expected. somewhere failed.

What would be the problem?

Where the logs(System.out.println()) will be printed in case of running the jar directly.

I have lot of sysouts. Will that cause problems?

Anyone please help in this regard.

Answer 1

According to the Java Doc: http://download.oracle.com/javase/6/docs/api/java/lang/System.html#out

The “standard” output stream. This
stream is already open and ready to
accept output data. Typically this
stream corresponds to display output
or another output destination
specified by the host environment or
user.

For logging purposes, use some library such as log4j or Java Logging.