DrJava

Java API specs (load the appropriate one into your browser and then bookmark it)

• Specs for version 1.6
• Specs for version 1.5
• Specs for version 1.4.1
• For Macintosh with OS9 --upgrade to OS10!

Sun's site for Java

General Java resources, including documentation

• The Java language specification --take a look at it. You can download it in html or pdf form.
• A glossary on OO concepts used in CS101J.
• A Java glossary (very useful!). But don't forget to use the glossary in ProgramLive!
• Online Java language tutorial.
• Sun's code Conventions for Java, a comprehensive set of guidelines on programming style.

Java Software (some of it is free)

• Here's a page for Linux Java tools.
• Here's a page for general (Windows and Mac) Java tools.