java.util.Hashtable.size() Method

Description

The size() method is used to get the number of keys in this hashtable.

Declaration

Following is the declaration for java.util.Hashtable.size() method.

public int size()

Parameters

NA

Return Value

The method call returns the number of keys in this hashtable.

Exception

NA

Example

The following example shows the usage of java.util.Hashtable.size()

package com.tutorialspoint;

import java.util.*;

public class HashTableDemo {
   public static void main(String args[]) {
      
      // create hash table 
      Hashtable htable = new Hashtable(3); 

      // populate the table
      htable.put(1, "TP");
      htable.put(2, "IS");
      htable.put(3, "THE");
      htable.put(4, "BEST");
      htable.put(5, "TUTORIAL");

      System.out.println("Size of the hash table is: "+htable.size()); 
   }    
}

Let us compile and run the above program, this will produce the following result.

Size of the hash table is: 5

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