iterate through map hashmap linkedhashmap in java

How to iterate through Map.. MashMap, LinkedHashMap ...  in Java
Method 1 : If you're only interested in the keys, you can iterate through the keySet() of the map:

Map map = ...;

for (String key : map.keySet()) {
    // ...
}

Method 2 :
If you only need the values, use values():

for (Object value : map.values()) {
    // ...
}

Method 3  : If you want both the key and value, use entrySet():

for (Map.Entry entry : map.entrySet()) { 

 String key = entry.getKey(); 

 Object value = entry.getValue(); 

 // ...
}

Method 4 :using Iterator 

public static void printMap(Map mp) { 

 Iterator it = mp.entrySet().iterator(); 

  while (it.hasNext()) { 

    Map.Entry pairs = (Map.Entry)it.next(); 

    System.out.println(pairs.getKey() + " = " + pairs.getValue()); 

    it.remove(); 

  } 

}

Source : java-iterate-through-hashmap