Java HashMap - getOrDefault() Method
The java.util.HashMap.getOrDefault() method returns the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key.
Syntax
public V getOrDefault(Object key, V defaultValue)
Here, V is the type of value maintained by the container.
Parameters
key |
Specify the key whose associated value is to be returned. |
defaultValue |
Specify the default mapping of the key. |
Return Value
Returns the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key.
Exception
NA
Example:
In the example below, the java.util.HashMap.getOrDefault() method returns the value to which the specified key is mapped in the given HashMap.
import java.util.*;
public class MyClass {
public static void main(String[] args) {
//creating a hash map
HashMap<Integer, String> MyMap = new HashMap<Integer, String>();
//populating hash map
MyMap.put(101, "John");
MyMap.put(102, "Marry");
MyMap.put(103, "Kim");
MyMap.put(104, null);
MyMap.put(105, "Sam");
//printing the value associated with
//specified key of the HashMap
System.out.println("key 101: " + MyMap.getOrDefault(101, "Blank"));
System.out.println("key 102: " + MyMap.getOrDefault(102, "Blank"));
System.out.println("key 104: " + MyMap.getOrDefault(104, "Blank"));
System.out.println("key 107: " + MyMap.getOrDefault(107, "Blank"));
}
}
The output of the above code will be:
key 101: John key 102: Marry key 104: null key 107: Blank
❮ Java.util - HashMap
