Map集合遍历的5种方式

Map<Integer,Integer> map = new HashMap<Integer,Integer>(); 1.keyset values for(Integer key:map.keySet()){ System.out.println(key); } for(Integer value:map.values()){ System.out.println(value); } 2.KeySet get(key) for(Integer key:map.keySet()){ System.out.println(key+""+map.get(key)) } 3.entrySet for(Map.Entry<Integer,Integer> entry:map entrySet()){ System.out.println(entry.getKey()+":"+entry.getValue()); } 4.Iterator Iterator<Map.Entry<Integer,Integer>> it = map.entrySet().iterator(); while(it.hasNext()){ Map.Entry<Integer,Integer> entry =it.next(); System.out.println(entry.getKey()+":"+entry.getValue()); } 5.Lambda map.forEach((key,value)->{ System.out.println(key+":"+value); }); 

来源：51CTO

作者：大鹏视界U

链接：https://blog.csdn.net/qq_14842117/article/details/100594780