Java HashMap.remove(Object key)

Syntax

HashMap.remove(Object key) has the following syntax.

public V remove(Object key)

Example

In the following code shows how to use HashMap.remove(Object key) method.


/*from w w  w  .  ja va 2 s . co m*/
import java.util.HashMap;

public class Main {
   public static void main(String args[]) {
      HashMap<Integer, String> newmap = new HashMap<Integer, String>();      
      
      // populate hash map
      newmap.put(1, "tutorials");
      newmap.put(2, "from");
      newmap.put(3, "java2s.com");
      
      System.out.println("Values before remove: "+ newmap);
      
      // remove value for key 2
      newmap.remove(2);

      System.out.println("Values after remove: "+ newmap);
   }    
}

The code above generates the following result.