The most important rule of Java syntax: lines end with a semicolon. This punctuation tells Java (and you) that the line of code is over and isn’t intended to run on to the next line.

Arrays in Java are variables that contain multiple values. These let you store things like lists of high scores or phone numbers and can also be organized, counted, and manipulated in other ways.

Classes are just like Java classes, with member functions and variables. Scala uses Traits, which are like Java interfaces and abstract classes. class Cat (var breed: String) { def whatBreed(): String ...

Java is an object-oriented programming language, but there’s more to Java than programming with objects. This tutorial is the first of several introducing non-object-oriented features and syntax ...

When you use a var to declare a variable, the JVM assigns a type to the variable based on what it sees on the right-hand side of the assignment operation. That’s why the var reserved word is said to ...

Method and variable handles vs. Java reflection. To truly understand MethodHandles and VarHandles—what they do and why they are useful—it’s helpful to know a few things about reflection in Java.