Java Libraries

Java Standard Libraries

java.lang

Provides classes that are fundamental to the design of the JAVA programming language. java.lang is always implicitly imported.

java.net

Provides classes for implementing network applications.

java.util

Contains the Collections framework and provides event model, legacy collection classes, date and time facilities, and miscellaneous utility classes like String Tokenizer, etc

java.math

Provides classes for performing arbitrary-precision integer arithmetic (using BigInteger) and arbitrary-precision decimal arithmetic (using BigDecimal).