学习经历

[Java] 纯文本查看 复制代码

public class Demo {
    public static void main(String[] args) {
     Map<String,Integer>m= new HashMap<>();
     m.put("赵丽颖",168);
     m.put("刘亦菲",165);
     m.put("杨幂",160);
     m.put("刘亦菲",150);
        System.out.println(m);
        Set<String> s = m.keySet();
       /* Iterator<String> it = s.iterator();
        while (it.hasNext()){
            String key = it.next();
            Integer value = m.get(key);
            System.out.println(key+"="+value);
            System.out.println("=================");*/
            for (String s1 : s) {
                Integer v = m.get(s1);
                System.out.println(s1+"="+v);
            }
        System.out.println("===========");
        Set<Map.Entry<String, Integer>> set = m.entrySet();
        Iterator<Map.Entry<String, Integer>> it = set.iterator();
        while(it.hasNext()){
            Map.Entry<String, Integer> en = it.next();
            System.out.println(en.getKey()+"="+en.getValue());
        }
    }
}

学习经历

[Java] 纯文本查看 复制代码

public class Demo {
    public static void main(String[] args) {
     Map<String,Integer>m= new HashMap<>();
     m.put("赵丽颖",168);
     m.put("刘亦菲",165);
     m.put("杨幂",160);
     m.put("刘亦菲",150);
        System.out.println(m);
        Set<String> s = m.keySet();
       /* Iterator<String> it = s.iterator();
        while (it.hasNext()){
            String key = it.next();
            Integer value = m.get(key);
            System.out.println(key+"="+value);
            System.out.println("=================");*/
            for (String s1 : s) {
                Integer v = m.get(s1);
                System.out.println(s1+"="+v);
            }
        System.out.println("===========");
        Set<Map.Entry<String, Integer>> set = m.entrySet();
        Iterator<Map.Entry<String, Integer>> it = set.iterator();
        while(it.hasNext()){
            Map.Entry<String, Integer> en = it.next();
            System.out.println(en.getKey()+"="+en.getValue());
        }
    }
}