The Java virtual machine (JVM) is a program whose sole purpose is to execute other programs. This simple idea has made Java one of the most successful and long-lived platforms of all time.

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.

For instance, Java Sound uses the SPI at runtime to provide sound mixers, file readers and writers, and format conversion utilities to a Java sound program.