Java集合排序

<span style="font-size:18px;">public void sortList(){
		List<List<Map<String,String>>> list = new ArrayList<List<Map<String,String>>>();
		int group = 0;
		for(int i =0;i<10;i++){
			List<Map<String,String>> tempList = new ArrayList<Map<String,String>>();
			group = new Random().nextInt(45);
			for(int j = 0;j<2;j++){
				Map<String,String> map = new HashMap<String,String>();
				map.put("group", group+"");
				tempList.add(map);
			}
			list.add(tempList);
		}
		for(int i=0;i<list.size();i++){
			System.out.println("group ==" + list.get(i).get(0).get("group"));
		}
}</span>

<span style="font-size:24px;">group ==43
group ==25
group ==28
group ==32
group ==19
group ==20
group ==25
group ==21
group ==24
group ==36</span>

<span style="font-size:18px;">public List<List<Map<String, String>>> sortResList(List<List<Map<String, String>>> list) {
		if (list != null && list.size() > 0) {
			for (int i = 0; i <list.size(); i++) {
				for (int j = i; j < list.size(); j++) {
					int tempGroup = Integer.valueOf(list.get(i).get(0).get("group"));
					int tempGroup1 = Integer.valueOf(list.get(j).get(0).get("group"));
					if (tempGroup1 < tempGroup) {
						<span style="color:#ff0000;">Collections.swap(list, i, j);</span>
					}
				}
			}
		}
		return list;
}</span>

<span style="font-size:24px;">排序后的结果为：
sort之后的情况
group ==3
group ==9
group ==9
group ==10
group ==12
group ==23
group ==24
group ==36
group ==43
group ==44</span>