Java HashMapgetOrDefault() Method
Example
Output the value of an entry in a map, or "Unknown" if it does not exist:
import java.util.HashMap;public class Main { public static void main(String[] args) { HashMap<String, String> capitalCities = new HashMap<String, String>(); capitalCities.put("England", "London"); capitalCities.put("Germany", "Berlin"); capitalCities.put("Norway", "Oslo"); capitalCities.put("USA", "Washington DC"); System.out.println(capitalCities.getOrDefault("England", "Unknown")); System.out.println(capitalCities.getOrDefault("Canada", "Unknown")); }}Definition and Usage
ThegetOrDefault() method returns the value of the entry in the map which has a specified key. If the entry does not exist then the value of the second parameter is returned.
Syntax
public V getOrDefault(Objectkey, Vdef)V refers to the data type of the values of the map.
Parameter Values
| Parameter | Description |
|---|---|
| key | Required. Specifies the key of the entry to get the value from. |
| def | Required. Specifies the default value to return if an entry is not found. |
Technical Details
| Returns: | The value of the entry with the specified key or the value of thedef argument if an entry with that key does not exist. |
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Related Pages
❮ HashMap Methods
