java.util.Vector.isEmpty() Method


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Description

The isEmpty() method is used to tests if this vector has no components.

Declaration

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

public boolean isEmpty()

Parameters

NA

Return Value

The return value is true if and only if this vector has no components, that is, its size is zero.Otherwise it returns false.

Exception

NA

Example

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

Live Demo
package com.tutorialspoint;

import java.util.Vector;

public class VectorDemo {
   public static void main(String[] args) {

      // create an empty Vector vec with an initial capacity of 4      
      Vector<Integer> vec = new Vector<Integer>(4);

      // let us test the vector
      System.out.println("The vector does not have any element"); 
      System.out.println("The vector is empty: "+vec.isEmpty()); 

      // use add() method to add elements in the vector
      vec.add(4);
      vec.add(3);
      vec.add(2);
      vec.add(1);

      // let us test the vector again
      System.out.println("The vector has elements"); 
      System.out.println("The vector is empty: "+vec.isEmpty()); 
   }     
}

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

The vector does not have any element
The vector is empty: true
The vector has elements
The vector is empty: false

java_util_vector.htm

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