question: public static String makeDescriptor ( Class [ ] params , Class retType ) { StringBuffer sbuf = new StringBuffer ( ) ; sbuf . append ( '(' ) ; for ( int i = 0 ; i < params . length ; i ++ ) makeDesc ( sbuf , params [ i ] ) ; sbuf . append ( ')' ) ; if ( retType != null ) makeDesc ( sbuf , retType ) ; return sbuf . toString ( ) ; }
target:  Makes a descriptor for a given method.