What is System.out exactly?

Question

I noticed that any call to System.out.println() from a JAR file that hasn\'t been started by the command line (i.e. a Runnable JAR file started by user with dou

Answer 1

Here, System.out represents the output stream - where your output will go. By default it is set to console. But you can change it to other like - text file. Most often, in large application it is used for logging (usually by new programmer, bad idea). In this case you can see the output in appropriate log file.