Fix a never-ending loop. Opportunist replacement of hard-coded values by constants.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK8@1606273 13f79535-47bb-0310-9956-ffa450edef68
Merge from the JDK8 branch.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK7@1606274 13f79535-47bb-0310-9956-ffa450edef68