位图排序:

public int[] weituSort(int[] array){
        for (int i = 0; i < array.length; i++) {
            set(array[i]);
        }
        int[] arrayCopy = new int[array.length];
        int j = 0;
        for (int i = 0; i < N; i++) {
            if (get(i)>0){
                arrayCopy[j++] = i;
            }
        }
        array = arrayCopy;
        return array;
    }

    public void set(int i){
        store[i>>SHIFT] |= (1<<(i&MASK));
    }
    public void clr(int i){
        store[i>>SHIFT] &= ~(1<<(i&MASK));
    }
    public int get(int i){
        return store[i>>SHIFT] & (1<<(i&MASK));
    }

但是好像没有快排快?不应该啊。。。