Bump class file version number to 55

Summary

Increment the maximum recognized class file major version number from 54 to 55 in JDK 11.

Problem

For every major release the class file major version number should be incremented, regardless of if there are any changes that mandate such a change.

Solution

The platform will be modified so tools such as the Java compiler and launcher will consume and produce 55 version class files.

Specification

The class file format version ranges table (table 4.1-A in The Java® Virtual Machine Specification Java SE 10 Edition) will be updated to include an entry:

Java SE     class file format version range

11  45.0 ≤ v ≤ 55.0