get key of hashmap java code example

Example 1: find a value in hashmap

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

}

Example 2: java hashmap get array of keys

for (int key : myHashMap.keySet()){
	// do stuff
}

Example 3: java get keys from hashmap

//returns as set
hashmap.keySet()

Example 4: 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"