It would be nice if the javac compiler could give warnings similiar
to gcc -Wall. The following two items were suggested by a licensee :-

1. Generate warning if there are unused local members or arguments

2. Generate warning for "x = x" occurences which often is a source
   error where the programmer has actually intended "this.x = x", eg:-
   private int count;
public void setCount( int count ) {
count = count; // should be this.count = count;
        }