FULL PRODUCT VERSION :
java version "1.7.0_60"
Java(TM) SE Runtime Environment (build 1.7.0_60-b19)
Java HotSpot(TM) 64-Bit Server VM (build 24.60-b09, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Windows 7 SP1 64bit

A DESCRIPTION OF THE PROBLEM :
Execution of jars does not work with unc paths exceeding 260 characters.

java -jar //?/c:/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/test.jar

fails with

Error: Unable to access jarfile //?/c:/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/long/path/test.jar


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Create an executable jar and place it on windows on a path deeper than 260 characters.

Execute the jar with the full path.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Execution of jar.
ACTUAL -
Error: Unable to access jarfile

REPRODUCIBILITY :
This bug can be reproduced always.