10000个星星里，随机抽取不同的1000星星

public static List get1000Star(){List stars = new ArrayList();List returnLs = new ArrayList();for(int i=1;i<=10000;i++){stars.add(i);}int z = 10000;for(int j=0;j<1000;j++){double sss = Math.floor(Math.random()*(z-1)+1);int it = (int) sss;returnLs.add(stars.get(it));stars.remove(it);z--;}return returnLs;}