java.util.Hashtable.size() Method


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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

java_util_hashtable.htm

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