Project Coin: Minty Fresh Libraries

The JDK 7 build has been using -source 7 for some time, but to date use of new language features has been informal and incidental. Supporting Project Coin and JSR 334, Stuart Marks will be leading a "minting" exercise over the JDK code base to systematically update the JDK libraries to take advantage of the Project Coin language features. Efforts will be focused on the src and test portions of the jdk repository of the JDK 7 forest. The first features to be rolled into the code will be diamond and strings in switch.

Review requests for different areas will be sent to the appropriate OpenJDK aliases for review. The proposed changes will consist solely of conversions of existing code to use a new language feature. While use of the new features is encouraged, in areas of the platform where code is kept synchronized with earlier release trains, such code cannot be updated to use the Project Coin features at this time.

For several years, we've been collaborating with the NetBeans team to provide IDE support for the Project Coin features. NetBeans 7 Beta is the latest release to support Project Coin, as detailed in its release notes. We will continue to coordinate with the NetBeans team to update the Project Coin support in NetBeans as refinements are made to the Project Coin features. Additionally, to allow use of NetBeans for JDK development, we will defer updating the JDK to use a Coin feature until there is matching support in a NetBeans build, as there is now for diamond and strings in switch. (The NetBeans 7 Beta supports a slightly older version of multi-catch and try-with-resources.)

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