To do the same, open Command Prompt and then run the following command to check which version of Java is installed on your computer. If it gives you a result, Java is installed, otherwise, move to ...

2. The Java profiler: javap You can consider the Java command-line tool javap a complement to the javac utility. While javac compiles code, the javap utility reverses that compilation and provides ...

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.

There are many ways to install Java on Windows or Ubuntu Linux. Here are two simple examples. Install Java on Ubuntu To install Java on Ubuntu, a single apt install command is sufficient: sudo apt ...

The next time you need to examine command line arguments and things get a little complex, whip out your trusty open source Java toolkit, and use Command Line Interface (CLI).