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Remove all values from HashMap in Java
To remove all values from HashMap, use the clear() method.
First, let us create a HashMap.
HashMap hm = new HashMap();
Add some elements to the HashMap
hm.put("Wallet", new Integer(700));
hm.put("Belt", new Integer(600));
hm.put("Backpack", new Integer(1200));Now, remove all the elements
hm.clear();
The following is an example to remove all values from HashMap.
Example
import java.util.*;
public class Demo {
public static void main(String args[]) {
// Create hash map
HashMap hm = new HashMap();
hm.put("Wallet", new Integer(700));
hm.put("Belt", new Integer(600));
hm.put("Backpack", new Integer(1200));
System.out.println("Map = "+hm);
hm.clear();
System.out.println("Map after removing all the elements (blank)= "+hm);
}
}The following is the output
Map = {Backpack=1200, Belt=600, Wallet=700}
Map after removing all the elements (blank)= {}
Updated on: 30-Jul-2019
4K+ Views
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