Here's what you covered in this section:
You learned that Java compiles .java files into .class bytecode, and the JVM executes that bytecode on any platform. You installed the JDK, wrote HelloWorld.java, compiled it with javac, and ran it with java.
You set up IntelliJ IDEA, created a project, and ran code from the IDE. You practiced System.out.print vs System.out.println, used escape characters like \n and \t, and followed Java naming conventions.
Next, you'll move into variables, data types, and operators.