Java Program to Get key from HashMap using the value

To understand this example, you should have the knowledge of the following Java programming topics:

Example: Get key for a given value in HashMap

Output

HashMap: {One=1, Two=2, Three=3}
The key for value 3 is Three

In the above example, we have created a hashmap named numbers. Here, we want to get the key for the value 3. Notice the line,

Entry<String, Integer> entry : numbers.entrySet()

Here, the entrySet() method returns a set view of all the entries.

Inside the if statement we check if the value from the entry is the same as the given value. And, for matching value, we get the corresponding key.

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