list实现从大到小排序

public static void main(String[] args) {

List<Integer> list=new ArrayList<Integer>();

//产生10以内的随机数

int num = 10;

for(int i=1;i<=num;i++){

list.add(i);

}

for(Object o : list){

System.out.println(o);

}

System.out.println("++++++++++++++++++++++++++++++++++++");

Collections.sort(list, new Comparator<Integer>() {

@Override

public int compare(Integer o1, Integer o2) {

if (o1> o2) {

return -1;

} else if (o1 < o2) {

return 1;

}

return 0;

}

});

for(Object o : list){

System.out.println(o);

}

}