In the Java API, classes are grouped into packages. ArrayList is in the package called java.util, which holds a pile of utility classes. You have to know the full name* of the class you want to use in ...

To create byte code that can be executed on any Java Virtual Machine, Java applications are compiled. Because Java code can be safely executed on any platform, regardless of the operating system or ...

This cheat sheet, from Princeton University's Introduction to Programming in Java course, makes a great reference for the basics you need to know, like structure, input/output, data types, and ...

Java 8+ Cheat Sheet – This book is solely based on Cay Horstmann's books, who has written several programming-related books. It has streams, collections, lambda expressions, and optional data, and it ...