Java cheatsheets - FosseryWeb

Primitive Data Types

Non-object data types supported by Java.

String

Reference data type for storing text data, which has some properties of primitive data types.

Input/output

Printing data to CLI output, and prompting users of the program to input data.

Object-Oriented Programming (OOP)

Usage of classes, interfaces, enums, access modifiers, and other elements of OOP.

Loops and Iteration

Usage of loops and other ways to iterate on arrays, Strings, Collections.

Streams

Create a sequence of elements from numbers, an array or a collection, and execute sequential or parallel operations on it. Often used to replace loops in Java 8 and higher.

Array

The most basic data structure to store multiple piece of data of the same type.

Lists

The most common Collection types, used to store elements in a fixed order.

Maps

Collections to store data organized into key-value pairs.

Coming soon...

Stacks and Queues

Create "last in, first out" (LIFO) stack, and "first in, first out" (FIFO) queue data structures in Java.

Coming soon...