Project Coin

The goal of Project Coin is to determine what set of smalllanguage changes should be added to JDK 7. That list is:

• Strings in switch
• Binary integral literals and underscores in numericliterals
• Multi-catch and more precise rethrow
• Improved type inference for generic instance creation(diamond)
• try-with-resources statement
• Simplified varargs method invocation

The previously selected features of collections support andunsigned literals have been deferred and will be reconsidered inJDK 8.

History

An open call for proposals period ran from February 27, 2009through March 30, 2009. The nearly 70proposal forms that weresubmitted received extensive discussion on the Project Coin mailinglist,coin-dev.

After due consideration,fiveor so proposals were selected for inclusion in JDK 7; the listof selected proposals wassubsequentlyupdated. Discussion of the selected proposals continues on thecoin-devlist.

This Project is sponsored by theCompiler Group.

Community

• Mailing lists
  • coin-dev
• Bloggers
  • JoeDarcy and other Sun bloggers
• Wiki
  • http://wiki.openjdk.java.net/display/Coin/Main