The commons lang components contains a set of java classes that provide helper methods for standard java classes, especially those found in the java.lang package in the jdk 5+.

commons lang 3.x use a different package (org.apache.commons.lang3) than the previous versions (org.apache.commons.lang), allowing it to be used at the same time as an earlier version.

commons lang 3.x is only compatible with jdk 1.5+