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 ...

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 ...

this is a work in progress. this cheat sheet contains keywords, definitions, tips, methods, etc that can be used for review, memorization, and better understanding of java language. you can download ...