Chapter: Java The Complete Reference - The Java Library - Exploring java.lang

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Exploring java.lang

This chapter discusses those classes and interfaces defined by java.lang.

Chapter 17

Exploring java.lang

This chapter discusses those classes and interfaces defined by java.lang. As you know, java.lang is automatically imported into all programs. It contains classes and interfaces that are fundamental to virtually all of Java programming. It is Java’s most widely used package.

java.lang includes the following classes:


java.lang includes the following interfaces:


Several of the classes contained in java.lang contain deprecated methods, most dating back to Java 1.0. These deprecated methods are still provided by Java to support an ever-shrinking pool of legacy code and are not recommended for new code. Because of this, the deprecated methods are not discussed here.


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