Java | HashMap | getOrDefault(K , defaultValue) | Configure Default Value when Key is Not Available.
Generally, when we are using HashMap we will use the get() method for returning the value of a Key. Now get() will return the actual value when the key has existed in the hashmap. If the key is not available, then returns null. But here, HashMap provided another method called as getOrDefault(key, defaultValue) for getting a default value in case the key does not exist. If the Key is available then it will return the associated value from HashMap only like get().
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