Java ConcurrentHashMap clear() Method

by Online Tutorials Library July 22, 2022

Java ConcurrentHashMap clear() Method

The clear() method of Constructor class removes all of the mappings from this map.

Syntax

Parameter

No any parameter is passed.

Returns

Throws

No exception is thrown.

Example 1

  import java.util.concurrent.ConcurrentHashMap;   import java.util.*;       public class ConcurrentHashMapclearExample1 {           public static void main(String[] args)       {           Map chm = new ConcurrentHashMap();     //put is used to add value to map          chm.put(“1”, “1”);           chm.put(“2”, “10”);           chm.put(“3”, “100”);           chm.put(“4”, “2”);           chm.put(“5”, “20”);           chm.put(“6”, “200”);               System.out.println(“Values in map: n”                             + chm);           chm.clear(); // clear will clear all the values in map.          System.out.println(“Map after calling clear(): ”                             + chm);       }   }   ,>,>

Test it Now

Output:

Values in map:   {1=1, 2=10, 3=100, 4=2, 5=20, 6=200}  Map after calling clear(): {}

Example 2

  import java.util.concurrent.ConcurrentHashMap;   import java.util.*;       public class ConcurrentHashMapclearExample2 {           public static void main(String[] args)       {           Map chm2 = new ConcurrentHashMap();     //put is used to add value to map    //map can also have string as key           chm2.put(“a”, “1”);           chm2.put(“b”, “10”);           chm2.put(“c”, “100”);           chm2.put(“d”, “2”);           chm2.put(“e”, “20”);           chm2.put(“f”, “200”);               System.out.println(“Values in map: n”                             + chm2);           chm2.clear(); // clear will clear all the values in map.          System.out.println(“Map after calling clear(): ”                             + chm2);       }   }   ,>,>

Test it Now

Output:

Values in map:   {a=1, b=10, c=100, d=2, e=20, f=200}  Map after calling clear(): {}

Next TopicJava ConcurrentHashMap

Java ConcurrentHashMap clear() Method

Java ConcurrentHashMap clear() Method

Syntax

Parameter

Returns

Throws

Example 1

Example 2

Java Array getShort() Method

Java ConcurrentHashMap remove() Method

You may also like