Exception in thread "main" java.lang.Exception: Need at least one command line argument!, Getting User Input Apart from using the command line-arguments of a program, there is an alternative way for ...

Some programs provide the ability to add arguments when executing it in order to change a particular behavior or modify how the program operates. As an example lets look at the command line ...

Another goal is allowing methods to be selected via command-line argument, configuration files, the jcmd tool, and over the network via the Java Management Extensions API.

Linux/BSD command line wizardry: Learn to think in sed, awk, and grep "Do people really write these long, convoluted commands?" In a word: yes.