Sun Microsystems 发布了 Java Platform, Standard Edition 6 (Java SE 6)
的Beta版本。也就是Mustang的Beta版本。"相信这个版本在功能及易用性上应该有不小的改进。"
Sun发言人提到,通过扩展对脚本语言以及web service的支持，Java SE 6已经成为了下一代WEB
2.0应用的平台，现在我们发布Beta版本，让广大开发者进行测试。” Jeff Jackson
提到。“同时希望开发者们尽早测试，并将bug反馈给我们”。
Java SE 6支持JAX-WS 2.0 和 JAXB 2.0，提供对程序进行监测和管理的工具，提供对DTrace的扩展支持。
同时SUN提到：Java SE6对桌面程序的效率将有显著的提高，这无疑是非常让人期待的。"希望所谓的SE6的桌面程序不是在炒作而已，必尽桌面MS是老大。不过Mustang的新特性还是很值得我们期待的，等下载测试后再发表意见！下载(Java SE 6)Beta版在here

New Security features and enhancements:
1. Native platform GSS/Kerberos integration
2. Java Authentication and Authorization Service (JAAS) login module that employs LDAP authentication
3. New Smart Card I/O API
Integrated Web Services:
1.    New API for XML digital signature services for secure web services
2.    New Client and Core Java Architecture for XML-Web Services (JAX-WS) 2.0 APIs
3.    New support for Java Architecture for XML Binding (JAXB) 2.0
Enhanced Management & Serviceability:
1. Improved JMX Monitoring API
2. Runtime Support for dTrace (Solaris 10 and future Solaris OS releases only)
3. New custom deployment facilities
Increased Developer Productivity:
1. Improved memory usage analysis and leak detection
2. Significant library improvements
3. Improvements to the Java Platform Debug Architecture (JPDA) & JVM Tool Interface
Improved User Experience:
1. Look and feel updates to better match underlying platforms
2. Improved desktop performance and integration
3. Enhanced internationalization support