Java迭代Map方法

map map=new hashmap();
map.put("1", "one");
map.put("2","two");
map.put("3", "three");
map.put("4", "four");
map.put("5", "five");
map.put("6", "six");

方法一:
iterator keys = map.keyset().iterator();

while(keys.hasnext()) {
string key = (string) keys.next();
string value=map.get(key);
system.out.println("键"+key+"="+"值"+value);

}

方法二:
iterator keys = map.entryset().iterator();

while(keys.hasnext()) {
map entry =(map)keys.next();
string key=(string)entry.getkey();
string value=(string)entry.getvalue();
system.out.println("键"+key+"="+"值"+value);

}
方法三：
map.foreach((key, value) -> system.out.println(key + ":" + value));