Finally, to run the command, use the Java command. If you’re compiling simple programs and housing them all in the same directory, you don’t have to set a permanent path for your files ...

We’ll start by compiling and running a Java program the old-fashioned way—with text files and console commands. This gives us a good sense of what’s actually happening. Step 1.

A Java compiler is a program that takes the text file work of a developer and compiles it into a platform-independent Java file. Java compilers include the Java Programming Language Compiler (javac), ...

With each new Java platform release, the stewards of the language always include a few new preview features that can be toyed with only if a developer knows how to unlock the capabilities at runtime.