question: public boolean add ( int value ) { int index = value % this . numBuckets ; Bucket bucket = this . buckets [ index ] ; if ( bucket == null ) { bucket = this . buckets [ index ] = new Bucket ( this . bucketInitialCapacity ) ; } else { for ( int i = 0 ; i < bucket . length ; i ++ ) { if ( bucket . values [ i ] == value ) return false ; } } if ( bucket . values . length <= bucket . length ) { int [ ] tmp = new int [ 2 * bucket . values . length ] ; System . arraycopy ( bucket . values , 0 , tmp , 0 , bucket . values . length ) ; bucket . values = tmp ; } bucket . values [ bucket . length ++ ] = value ; this . size ++ ; return true ; }
target:  Adds the specified value to this set. If this set does not contain the value, it is added to this set and this returns true. Otherwise this does nothing and returns false.