java.util.Hashtable.isEmpty() Method


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Description

The isEmpty() method is used to test if this hashtable maps no keys to values.

Declaration

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

public boolean isEmpty()

Parameters

NA

Return Value

The method call returns 'true' if this hashtable maps no keys to values; false otherwise.

Exception

NA

Example

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

Live Demo
package com.tutorialspoint;

import java.util.*;

public class HashTableDemo {
   public static void main(String args[]) {
      
      // create hash table 
      Hashtable htable1 = new Hashtable();      

      // put values in table
      htable1.put(1, "A");
      htable1.put(2, "B");
      htable1.put(3, "C");
      htable1.put(4, "D");

      // check if table is empty
      System.out.println("Is hash table empty :"+htable1.isEmpty()); 
   }    
}

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

Is hash table empty :false

java_util_hashtable.htm

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