You might know that Java passes by value, but it helps to understand why. Here's what happens when you pass mutable and immutable object references in Java.

This post explains how to call a method in Java. Learn how to define methods, call them from other classes, and pass arguments!

Learn how to use synchronous and asynchronous callbacks in Java—including callbacks with lambda expressions, CompletableFuture, and more.

static – Java’s main method is static, which means no instances need to be created beforehand to invoke it. void – Some programming languages return a zero or 1 to indicate the main method has run ...