Difference between jdk 1.6 and jdk 1.7:

1)Java 1.6 runs faster than Java 1.5.
2)Java 1.6 makes programming easier by implementing various tools such as SwingWorker and JTable to develop user interface.
3)In java 1.6,Java DB, a new database management tool, has been included. Java DB is based on the open-source Apache Derby and is supported by Sun.
4)Jdk 6 provides high performance, reliability, and UI improvements.
5)Jdk 6 is having expanded monitoring and diagnositics capacities which delivers dramatic out-of-the-box benefits without any coding changes or even a re-compile necessary.
6)Java SE 6 streamlines web service and XML development, simplifies GUI development and augments native desktop support, expands programmatic access to native security facilities, and is the first release to offer a standardized framework for scripting languages.

i am talking about jdk 1.6 vs 1.7 and you have given the reply for 1.5 vs 1.6

Java SE 6 Release notes.. sun replaced the name "J2SE" with java se and dropped the ".0" from the version number. Beta versions were released in february and june 2006, leading up to a final release that occurred on december 11, 2006. The current revision is update 14 which was released in may 2009.

• Support for older win9x versions dropped.
• Scripting lang support: Generic API for integration with scripting languages, & built-in mozilla javascript rhino integration
• Dramatic performance improvements for the core platform, and swing.
• Improved web service support through JAX-WS JDBC 4.0 support
• Java compiler API: an API allowing a java program to select and invoke a java compiler programmatically.
• Upgrade of JAXB to version 2.0: including integration of a stax parser.
• Support for pluggable annotations
• Many GUI improvements, such as integration of swingworker in the API, table sorting and filtering, and true swing double-buffering (eliminating the gray-area effect).

Java se 6 update 10 A major enhancement in terms of end-user usability. - Java Deployment Toolkit, a set of javascript functions to ease the deployment of applets and java web start applications. - Java Kernel, a small installer including only the most commonly used jre classes. Enhanced updater. - Enhanced versioning and pack200 support: server-side support is no longer required. - Java quick starter, to improve cold start-up time. - Improved performance of java2D graphics primitives on windows, using direct3D and hardware acceleration. - A new Swing look and feel called NIMBUS and based on synth. - Next-generation java plug-in: applets now run in a separate process and support many features of web start applications.

Java se 6 update 12 This release includes the highly anticipated 64-bit java plug-in (for 64-bit browsers only), windows server 2008 support, and performance improvements of java and JAVAFX applications.