The Java Class Library

Java contains an extensive library of pre-written classes you can use in your programs. These classes are divided into groups called packages.

The Java 1.1 packages


      	java.applet 
      	
java.awt 
      	
java.awt.datatransfer 
      	
java.awt.event 
      	
java.awt.image 
      	
java.awt.peer 
      	
java.beans 
      	
java.io 
      	
java.lang 
      	
java.lang.reflect 
      	
java.math 
      	
java.net 
      	
java.rmi 
      	
java.rmi.dgc 
      	
java.rmi.registry 
      	
java.rmi.server 
      	
java.security 
      	
java.security.acl 
      	
java.security.interfaces 
      	
java.sql 
      	
java.text 
      	
java.util 
      	
java.util.zip

Each package defines a number of classes, interfaces, exceptions, and errors.

Packages can be split into sub-packages. for example, the java.lang package has a sub-package called java.lang.reflect. These are really completely different packages. A class in a sub-package has no more access to a class in the parent package (or vice versa) than it would to a class in a completely different package.

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Last Modified June 8, 1999
Copyright 1997, 1999 Elliotte Rusty Harold
elharo@metalab.unc.edu