Java initialize hashmap with values

To initialize a HashMap with values in Java, you can use the put() method.

Here is an example of how to initialize a HashMap with values in Java:

Map<String, Integer> map = new HashMap<>();
map.put("apple", 1);
map.put("banana", 2);
map.put("cherry", 3);

In this example, the map variable is initialized with a new HashMap object, and the elements ("apple", 1), ("banana", 2), and ("cherry", 3) are added to the map using the put() method.

You can also use the putAll() method to initialize a HashMap with the contents of another map:

Map<String, Integer> map1 = new HashMap<>();
map1.put("apple", 1);
map1.put("banana", 2);

Map<String, Integer> map2 = new HashMap<>();
map2.put("cherry", 3);
map2.put("date", 4);

map1.putAll(map2);

In this example, the map1 variable is initialized with the elements ("apple", 1) and ("banana", 2), and the map2 variable is initialized with the elements ("cherry", 3) and ("date", 4). The putAll() method is then used to copy the elements of map2 into map1, resulting in a map1 that contains the elements ("apple", 1), ("banana", 2), ("cherry", 3), and ("date", 4).

For more information on the Map interface and the HashMap class in Java, you can refer to the Java documentation.