http://www.macnn.com/articles/01/05/21/netbeans.gains/
NetBeans gains OS X support
updated 02:20 pm EDT, Mon May 21, 2001
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Among the new modules released for the NetBeans open source project, a standards-based integrated development environment platform directed towards Java developers, is Mac OS X support, delivering the software to early adopters of Apple's latest operating system. The newly added modules streamline Java application development and address a range of issues, including integration with Apache's "Ant" XML scriptable build tool, improved application server deployment support and SOAP-based Web services generation and deployment.
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NetBeans ROCKS!
If you are serious about developing JAVA on OSX (or any other platform) then this is your IDE. It's free and kicks a**!