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.

As a Java application user, you would be more involved with the JRE, which lets you run those programs. Java 9 restructured the Java platform so that the JRE is now only available as part of a JDK.

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 ...

Running Java programs in an environment with monospaced fonts, such as the Windows Command Line or the Macintosh Terminal, allows you to arrange and format your text into neat columns by counting ...