How to run a Java program using Command Prompt First things first, you will have to write the code that you want to run and save that as a Java executable file.

Learn how a Java JAR file (Java Archive) allows you to package compiled code and other resources in a single file that is easily deployed and executed resources.

A Java compiler takes a text file and compiles it into a platform-independent Java file, meaning the compiled code can run on any OS. Learn how it works.

If Java is not recognized as internal or external command, you need to make sure that the installation is not problematic and its path is recognized as system variables.