Java API Packages in java

Java API Packages or Java Application programming Interface

As you’ve seen, Java contains many predefined classes that are grouped into categories of

related classes called packages. Together, these are known as the Java Application Programming

Interface (Java API), or the Java class library. A great strength of Java is the Java

API’s thousands of classes. Some key Java API packages are described in Fig. 6.5, which

represents only a small portion of the reusable components in the Java API. 

Package Description

  

java.applet  ,The Java Applet Package contains a class and several interfaces required

to create Java applets—programs that execute in web browsers. Applets

 

java.awt ,  The Java Abstract Window Toolkit Package contains the classes and

interfaces required to create and manipulate GUIs in early versions of

 

Java. In current versions, the Swing GUI components of the javax.swing

packages are typically used instead.

 

 

 

 

java.awt.event , The Java Abstract Window Toolkit Event Package contains classes and

interfaces that enable event handling for GUI components in both the

 

java.awt and javax.swing packages

 

java.awt.geom ,The Java 2D Shapes Package contains classes and interfaces for working

with Java’s advanced two-dimensional graphics capabilities.

 

java.io , The Java Input/Output Package contains classes and interfaces that

enable programs to input and output data.

 

java.lang ,The Java Language Package contains classes and interfaces (discussed

bookwide) that are required by many Java programs. This package is

imported by the compiler into all programs.

 

java.net ,The Java Networking Package contains classes and interfaces that

enable programs to communicate via computer networks like the Internet.

 

java.sql  ,The JDBC Package contains classes and interfaces for working with

databases.

 

java.util , The Java Utilities Package contains utility classes and interfaces that

enable such actions as date and time manipulations, random-number

 

processing (class Random) and the storing and processing of large

amounts of data.

 

java.util.concurrent The Java Concurrency Package contains utility classes and interfaces

  

for implementing programs that can perform multiple tasks in parallel.

 

javax.media ,The Java Media Framework Package contains classes and interfaces for

working with Java’s multimedia capabilities.

 

javax.swing , The Java Swing GUI Components Package contains classes and interfaces

for Java’s Swing GUI components that provide support for portable

GUIs.projavax.

swing.event , The Java Swing Event Package contains classes and interfaces that

 

 

enable event handling (e.g., responding to button clicks) for GUI components

 

in package javax.swing.

 

 

 

 

 

javax.xml.ws , The JAX-WS Package contains classes and interfaces for working with

 

 

web services in Java.