Get size of Hashtable example

This is an example of how to get the size of the Hashtable, that is the number of the key- value pairs that the Hashtable contains. Getting the size of the Hashtable implies that you should:

  • Create a new Hashtable.
  • Populate the hashtable with elements, using put(K key, V value) API method of Hashtable.
  • Invoke the size() API method of the Hashtable. It returns the number of keys of Hashtable.

Let’s take a look at the code snippet that follows:

package com.javacodegeeks.snippets.core;
import java.util.Hashtable;
public class SizeHashtable {
  public static void main(String[] args) {
    // Create a Hashtable and populate it with elements
    Hashtable hashtable = new Hashtable();
    // int size() operation returns the number of key value pairs stored in Hashtable    
    System.out.println("Size of Hashtable : " + hashtable.size());


Size of Hashtable : 3

This was an example of how to get the size of the Hashtable in Java.

Ilias Tsagklis

Ilias is a software developer turned online entrepreneur. He is co-founder and Executive Editor at Java Code Geeks.
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