java.lang package

Definition

The java.lang package is a built-in package in Java that provides fundamental classes and interfaces for the Java language. It includes classes such as String, Integer, and Math.

Analogy

Think of the java.lang package as a toolbox filled with essential tools that every Java programmer needs. Just like how you can't build anything without a hammer or screwdriver, you can't write Java code without using classes from the java.lang package.

Related terms

Object class: The Object class is the root class of all classes in Java. It provides common methods that are inherited by all other classes.

System class: The System class contains methods and properties related to the system environment, such as input/output streams and system properties.

Math class: The Math class provides mathematical functions and constants, allowing you to perform calculations in your Java programs.