Java ConcurrentHashMap contains() Method

by Online Tutorials Library July 22, 2022

Java ConcurrentHashMap contains() Method

The contains() method of ConcurrentHashMap class tests if some key maps into the specified value in this table.

Syntax

Parameter

value – a value to search for.

Returns

true if some key maps to the value argument in this table as determined by the equals method; false otherwise

Throws

NullPointerException

Example 1

  import java.util.*;   import java.util.concurrent.*;       public class ConcurrentHashMapcontainsExample1  {       public static void main(String[] args)       {           ConcurrentHashMap  map = new ConcurrentHashMap();               map.put(“java”, 10);           map.put(“.net”, 15);           map.put(“python”, 20);           map.put(“c”, 25);           map.put(“c++”, 30);             System.out.println(” Mappings are: ” +map);             System.out.println(“is c  present? ::  ” + map.contains(25));          }   }  ,>,>

Test it Now

Output:

Mappings are: {python=20, c++=30, java=10, c=25, .net=15}  is c  present? ::  true

Example 2

  import java.util.concurrent.*;     import java.util.*;     public class ConcurrentHashMapcontainsExample2 {         public static void main(String[] args)       {           ConcurrentHashMap  mapcon = new ConcurrentHashMap();           mapcon.put(“Delhi”, 100);           mapcon.put(“Noida”, 200);           mapcon.put(“Mumbai”, 300);           mapcon.put(“Keral”, 400);               System.out.println(” Mappings are: ” +mapcon);             System.out.println(“is c  present? ::  ” + mapcon.contains(900));  //checks if map contains 900.      }   }  ,integer>,>

Test it Now

Output:

Mappings are: {Delhi=100, Keral=400, Noida=200, Mumbai=300}  is c  present? ::  false

Next TopicJava ConcurrentHashMap

Java ConcurrentHashMap contains() Method

Java ConcurrentHashMap contains() Method

Syntax

Parameter

Returns

Throws

Example 1

Example 2

Java Array getShort() Method

Java ConcurrentHashMap remove() Method

You may also like