集合的forEach遍历

• List集合

ArrayList<String> arrayList = new ArrayList<>();
        // 添加元素
        arrayList.add("萧炎");
        arrayList.add("唐三");
        arrayList.add("石昊");
        arrayList.add("夏新");
        arrayList.forEach(x-> System.out.println("name = " + x));

• Set集合

TreeSet<FY> treeSet = new TreeSet<>();
        FY a1 = new FY ("帝释天",1);
        FY a2 = new FY ("无名",2);
        FY a3 = new FY ("聂风",3);
        FY a4 = new FY ("步惊云",4);
        // 添加数据
        treeSet.add(a1);
        treeSet.add(a2);
        treeSet.add(a3);
        treeSet.add(a4);
        treeSet.forEach(x -> {System.out.println("id = " + x.getId() + ",name = " + x.getName());});

• Map集合

HashMap<Integer,String> hashMap = new HashMap<>();
        // 添加数据
        hashMap.put(1,"李白");
        hashMap.put(2,"韩信");
        hashMap.put(3,"十步杀一人");
        hashMap.put(4,"国士无双");
        hashMap.forEach((K,V)-> System.out.println("id = " + K + ",data = " + V));