Run your Hello World! program in Onecompiler Once you navigate to Onecompiler and select the JShell editor, you’ll find a program that runs the seminal Hello World! app is already coded for you. Click ...

A software program needs to execute, and to do that, it needs an environment to run in. In the past, most software used the operating system (OS) as the runtime environment.

The JVM has two primary functions: to allow Java programs to run on any device or operating system (known as the “write once, run anywhere” principle), and to manage and optimize program memory.

Some programs will run Java using the program’s availability through the PATH first, and JAVA_HOME second. If another program has installed a JRE and put that JRE’s \bin directory on the PATH, your ...