Common ways to traverse map sets

Map A set is a key value pair that stores values , So traverse Map A collection is a collection of keys and values .

1. adopt map.keySet() Get value , Then get the value according to the key

for(String s:map.keySet()){
    
            System.out.println("key : "+s+" value : "+map.get(s));
     }

2. take map adopt entrySet Method to set, Then go through it （ The more commonly used ）

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