Java: Get the value of a specified key in a map

Last update on May 22 2025 13:14:08 (UTC/GMT +8 hours)

10. Get Value by Key from Map

Write a Java program to get the value of a specified key in a map.

Sample Solution:-

Java Code:

import java.util.*;  
public class Example10 {  
    public static void main(String args[]){  
   HashMap<Integer,String> hash_map= new HashMap<Integer,String>();  
   hash_map.put(1,"Red");
  hash_map.put(2,"Green");
  hash_map.put(3,"Black");
  hash_map.put(4,"White");
  hash_map.put(5,"Blue");
     // get value of key 3
   String val=(String)hash_map.get(3); 
   // check the value
   System.out.println("Value for key 3 is: " + val);
 }
}

Sample Output:

Value for key 3 is: Black

For more Practice: Solve these Related Problems:

Write a Java program to retrieve a value from a map using get() and handle the case when the key is absent.
Write a Java program to implement a method that returns a default value if a specified key is not found in a map.
Write a Java program to use Java streams to find a map entry by key and then extract its value.
Write a Java program to retrieve the value for a key in a map and then update that value using computeIfPresent().

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Java Code Editor:

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