retrieving values from hashmap in java code example

Example 1: find a value in hashmap

if(hashMap.containsKey(key)) {
    Object o = hashMap.get(key);

}

Example 2: hashmap get value by key java

import java.util.HashMap;
//Within a class
//You can do new HashMap<Key Type, Value Type>();, but you don't need to
HashMap<Int, String> examplehashmap=new HashMap<>();
{
//put in values
 examplehashmap.put(5, "example");
};
//get value
examplehashmap.get(5);
//returns "example"