Java – How to clear HashTable

All Elements in HashTable can be removed by clear() method. Clear() method in HashTable clear HashTable object and size of the HashTable will become 0

Example of clear in HashTable

import java.util.Hashtable;

public class HashTableClearExample {

    public static void main(String[] args) {

        Hashtable<Integer,String> hTable=new Hashtable<Integer,String>();

        hTable.put(new Integer(2), "Two");
        hTable.put(new Integer(1), "One");
        hTable.put(new Integer(4), "Four");

        hTable.clear(); // clear all elements in hashtable

        System.out.println("Size of hashTable :"+hTable.size());
    }
}