一个简单的java排序

BitSet bitset = new BitSet();

int[] arrs = new int[]{3,4,7,34,90,1,3,2,45,23,23,11,2,20,30,50,39,1,123,12,400,401,230,33,6};

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

bitset.set(arrs[i]);

}

 

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

     if(bitset.get(i))  

         System.out.print(i+" ");

  }