[编程题]数组中重复的数字

  public boolean duplicate( int numbers[], int length, int [] duplication) {

         boolean [] k = new boolean [length];

         for ( int i = 0 ; i < k.length; i++) {

             if (k[numbers[i]] == true ) {

                 duplication[ 0 ] = numbers[i];

                 return true ;

             }

             k[numbers[i]] = true ;

         }

         return false ;

     }