question: public final int put ( Object key , int value , boolean isReplace ) { int prime = _prime ; int hash = Math . abs ( System . identityHashCode ( key ) % prime ) ; Object [ ] keys = _keys ; while ( true ) { Object testKey = keys [ hash ] ; if ( testKey == null ) { keys [ hash ] = key ; _values [ hash ] = value ; _size ++ ; if ( keys . length <= 4 * _size ) resize ( 4 * keys . length ) ; return value ; } else if ( key != testKey ) { hash = ( hash + 1 ) % prime ; continue ; } else if ( isReplace ) { int old = _values [ hash ] ; _values [ hash ] = value ; return old ; } else { return _values [ hash ] ; } } }
target:  Puts a new value in the property table with the appropriate flags