Here's how to install JDK 13 on Ubuntu and set the all-important JAVA_HOME variable. Step 2: Write code that uses a Java preview feature. The Java preview feature I'd like to test is the JDK 13 text ...

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.