Class file format java7

Brian Goetz brian.goetz at
Wed Feb 23 08:35:55 PST 2011

Classfile changes for Java SE 7 are being driven by JSR-292.  I think 
they have or are about to go to public review?  Check the JCP website 
for JSR-292, and watch John Rose's blog for announcements.

On 2/23/2011 11:02 AM, Roel Spilker wrote:
> Hi all,
> In java7 some modifications will be made to the class file format. At
> least there will be some new constant types added to the constant
> pool. For instance CONSTANT_MethodHandle for method handles.
> Is there already documentation available? I'm looking for something like
> If not, when can this be expected? I don't need a final version, but I
> would like to start working on java7 compliancy.
> Roel Spilker
> P.S. Can anybody tell me what happened to constant type #17?

More information about the lambda-dev mailing list