To do the same, open Command Prompt and then run the following command to check which version of Java is installed on your computer.

But these aforementioned Java command-line tools -- namely, javac, javap, jstat, jdeps and jar -- are the five that serious software developers need to know.

At the command prompt, type “java -version” (again, no quotes). Users also can visit Java.com and click the “Do I have Java?” link on the homepage.

Facilitate command line argument processing for Java tools with a simple helper class Many Java applications started from the command line take arguments to control their behavior.

Which version of Java should you use in Linux? Learn how to easily switch between different versions with a tutorial from Jack Wallen.