浅析java中Pair和Map的区别

Pair<Integer, String> pair = new Pair<>(1, "One");
	Integer key = pair.getKey();
	String value = pair.getValue();

AbstractMap.SimpleEntry<Integer, String> entry = new AbstractMap.SimpleEntry<>(1, "one");
	Integer key = entry.getKey();
	String value = entry.getValue();

	AbstractMap.SimpleImmutableEntry<Integer, String> entry = new AbstractMap.SimpleImmutableEntry<>(1, "one");

Pair<Integer, String> pair= Pair.of(2, "two");
	Integer key = pair.getKey();
	String value = pair.getValue();
	Integer key = pair.getLeft();
	String value = pair.getRight();

ImmutablePair<Integer, String> pair = new ImmutablePair<>(2, "Two");
	Integer key = pair.getKey();
	String value = pair.getValue();
	Integer key = pair.getLeft();
	String value = pair.getRight();

Pair<Integer, String> pair = new MutablePair<>(3, "Three");
	pair.setValue("New Three");

Tuple2<Integer, String> pair = new Tuple2<>(4, "Four");
  Integer key = pair._1();
  String value = pair._2();

tuplePair = pair.update2("New Four");

 // 使用Pair来排序
    JSONObject jsonObject1 = new JSONObject();
    jsonObject1.put("a", 9);
    JSONObject jsonObject2 = new JSONObject();
    jsonObject2.put("a", 4);
    JSONObject jsonObject3 = new JSONObject();
    jsonObject3.put("a", 7);
    JSONObject jsonObject4 = new JSONObject();
    jsonObject4.put("a", 8);
    ArrayList<Pair<Integer, JSONObject>> pairs = new ArrayList<>();
    pairs.add(Pair.of(1, jsonObject1));
    pairs.add(Pair.of(2, jsonObject2));
    pairs.add(Pair.of(3, jsonObject3));
    pairs.add(Pair.of(4, jsonObject4));

    List<Pair<Integer, JSONObject>> result = pairs.stream().sorted(Comparator.comparingInt(o -> o.getRight().getInteger("a"))).collect(Collectors.toList());
    result.forEach(System.out::println);

    System.out.println("==============================");
    
    // 使用map来排序
    HashMap<Integer, JSONObject> integerJSONObjectHashMap = new HashMap<>();
    integerJSONObjectHashMap.put(1, jsonObject1);
    integerJSONObjectHashMap.put(2, jsonObject2);
    integerJSONObjectHashMap.put(3, jsonObject3);
    integerJSONObjectHashMap.put(4, jsonObject4);

    List<Map.Entry<Integer, JSONObject>> result2 = integerJSONObjectHashMap.entrySet().stream().sorted(Comparator.comparingInt(o -> o.getValue().getInteger("a"))).collect(Collectors.toList());
    result2.forEach(System.out::println);