Skip to content
Related Articles

Related Articles

Improve Article
ConcurrentSkipListMap remove() method in Java with Examples
  • Last Updated : 14 Feb, 2019

The remove() method of java.util.concurrent.ConcurrentSkipListMap is an in-built function in Java which removes the mapping for the specified key from this map. The method returns null if there is no mapping for of that particular key. After this method is performed the size of the map is reduced.

Syntax:

ConcurrentSkipListMap.remove(Object ob)

Parameter: The function accepts a single mandatory parameter ob which specifies the key whose mapping is to be removed.

Return Value: The function returns the previous value associated with the specified key, or null if there was no mapping for the key.

Below programs illustrate the above method:






// Java Program Demonstrate remove()
// method of ConcurrentSkipListMap
  
import java.util.concurrent.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        // Initializing the map
        ConcurrentSkipListMap<Integer, Integer>
            mpp = new ConcurrentSkipListMap<Integer,
                                            Integer>();
  
        // Adding elements to this map
        for (int i = 1; i <= 5; i++)
            mpp.put(i, i);
        // remove() operation on the map
        mpp.remove(1);
  
        System.out.println("After remove(): " + mpp);
    }
}
Output:
After remove(): {2=2, 3=3, 4=4, 5=5}

Program 2:




// Java Program Demonstrate remove()
// method of ConcurrentSkipListMap
  
import java.util.concurrent.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        // Initializing the map
        ConcurrentSkipListMap<Integer, Integer>
            mpp = new ConcurrentSkipListMap<Integer,
                                            Integer>();
  
        // Adding elements to this map
        for (int i = 1; i <= 5; i++)
            mpp.put(i, i);
        // remove() operation on the map
        mpp.remove(5);
  
        System.out.println("After remove(): " + mpp);
    }
}
Output:
After remove(): {1=1, 2=2, 3=3, 4=4}

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentSkipListMap.html#remove-java.lang.Object-

Attention reader! Don’t stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready. To complete your preparation from learning a language to DS Algo and many more,  please refer Complete Interview Preparation Course.




My Personal Notes arrow_drop_up
Recommended Articles
Page :