Get a deep dive into using method references in your Java programs, including stream operations, event listeners, and constructors and factories.

This tutorial explains how a Java HashMap works internally and explores the challenges of implementing it, including buckets, collisions and hash codes.

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

What is the contract between equals() and hashcode()? Learn how these methods work together when comparing objects in Java.

All of Java's I/O facilities are based on streams that represent flowing sequences of characters or bytes. Java's I/O streams provide standardized ways to read and write data. Any object ...