Java Packages (Cont.)

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Built-in Packages (Cont.)
Some of the commonly used built-in packages are

java.math

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

java.awt

The AWT (Abstract Windowing Toolkit) package contains classes for implementing the components for graphical user interfaces like buttons.

JavaFX.*

JavaFX is a GUI toolkit for Java. JavaFX makes it easier to create desktop applications and games in Java.

java.io

Contains classes for supporting input/output operations.

java.lang

Contains language support classes (e.g., classes defining primitive data types and math operations). This package is automatically imported.

java.net

Contains classes for supporting networking operations or client-server applications.

java.sql

This package is used for retrieving the data from data base and performing various operations on data base.

java.util

Contains miscellaneous utility classes which implement data structures like linked list and dictionary, and provide a string tokenizer, a random-number generator, a bit array, etc.

The complete list can be found at Oracles website: https://docs.oracle.com/javase/8/docs/api/.

Review: Java Packages

Which Java package is imported by default?   java.io   java.lang   java.net   java.util

Result: