java.util.Hashtable.isEmpty() Method

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()

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