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Overview
Class java.lang.Object
java.lang Classes
java.util Classes
java.math Classes

One of the great strengths of Java is its large and powerful class library.

You can get an idea of the size and scope of the Java class library by going to the "javadoc" pages for the appropriate version of the JDK.

Click on this link: http://java.sun.com/j2se/1.5.0/docs/api/ to go to the javadoc pages that describe the Java API for Java 5 (a.k.a. 1.5).

Browse around a little to see how much there is!

Of course, with any such rich and powerful class library, you have to spend a lot of time learning what is there, what to use for what you need, and how to use it.  But don't worry!  You don't have to know everything in the class library in order to use it.  (I know I don't!)

This page was last modified on 27 November, 2007