Mac OS X implements Java 2, while Mac OS 9.x and earlier offers support for Java 1.1.x. To use Java applets in Mac OS 9.x and earlier, you will need Mac OS Runtime for Java (MRJ), which is installed by default on recent versions of both Mac OS and Mac OS X. You can get the latest versions of MRJ from Apple at:

http://www.apple.com/support/downloads/
For the most recent version of Java in Mac OS X, use Software Update. For instructions, see the Knowledge Base document For Mac OS or Mac OS X, how do I obtain and install system software updates? For more information, visit Apple's Java web page:

http://www.apple.com/java/
Current web browsers, including Internet Explorer, Netscape, Safari, Mozilla, and Camino all support Java.

If you are interested in developing with Java, Xcode (the Mac OS X developers' tools) includes support for Java. Other development tools include JBuilder, IDEA, Eclipse, NetBeans, and JDeveloper. For more information about Xcode, see Apple's developer page:

http://developer.apple.com/
For more information about developing for Java, see Apple's Java developer page:

http://developer.apple.com/java/

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