java 循环遍历map

以下是Java中循环遍历Map的两种方式：

1. 使用for-each循环遍历Map的键值对：

Map<Integer, String> map = new HashMap<>();
map.put(1, "apple");
map.put(2, "banana");
map.put(3, "orange");

for (Map.Entry<Integer, String> entry : map.entrySet()) {
    System.out.println(entry.getKey());
    System.out.println(entry.getValue());
}

2. 使用Iterator迭代器遍历Map的键值对：

Map<Integer, String> map = new HashMap<>();
map.put(1, "apple");
map.put(2, "banana");
map.put(3, "orange");

Iterator<Map.Entry<Integer, String>> iterator = map.entrySet().iterator();
while (iterator.hasNext()) {
    Map.Entry<Integer, String> entry = iterator.next();
    System.out.println(entry.getKey());
    System.out.println(entry.getValue());
}