question: public static Object callStaticMethod ( String classAndMethod , Object ... params ) throws Exception { int lastDot = classAndMethod . lastIndexOf ( '.' ) ; String className = classAndMethod . substring ( 0 , lastDot ) ; String methodName = classAndMethod . substring ( lastDot + 1 ) ; return callMethod ( null , Class . forName ( className ) , methodName , params ) ; }
target:  Calls a static method via reflection. This will try to use the method where the most parameter classes match exactly (this algorithm is simpler than the one in the Java specification, but works well for most cases).