update value of key in hashmap java code example

Example 1: update value in hashmap java

map.replace(key, map.get(key) + 1);
//or
map.put(key, map.get(key) + 1);

Example 2: change the value in a hashtable java

map.replace(key, newValue);

Example 3: java hashmap set value

myMap.put(key, value);