Java 遍历HashMap例子

以下是Java遍历HashMap的两个例子：

1.使用for-each循环遍历HashMap

HashMap<String, Integer> myHashMap = new HashMap<>();
myHashMap.put("1", 1);
myHashMap.put("2", 2);
for (Map.Entry<String, Integer> entry : myHashMap.entrySet()) {
    String key = entry.getKey();
    Integer value = entry.getValue();
    System.out.println(key + " : " + value);
}

2.使用Iterator遍历HashMap

HashMap<String, Integer> myHashMap = new HashMap<>();
myHashMap.put("1", 1);
myHashMap.put("2", 2);
Iterator<Map.Entry<String, Integer>> iterator = myHashMap.entrySet().iterator();
while (iterator.hasNext()) {
    Map.Entry<String, Integer> entry = iterator.next();
    String key = entry.getKey();
    Integer value = entry.getValue();
    System.out.println(key + " : " + value);
}