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Vector isEmpty() Method in Java
  • Last Updated : 14 Aug, 2018

The Java.util.Vector.isEmpty() method in Java is used to check and verify if a Vector is empty or not. It returns True if the Vector is empty else it returns False.

Syntax:

Vector.isEmpty()

Parameters: This method does not take any parameter.

Return Value: This function returns True if the Vectoris empty else it returns False.

Below programs illustrate the Java.util.Vector.isEmpty() method:



Program 1:

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// Java code to illustrate isEmpty()
import java.util.*;
  
public class VectorDemo {
    public static void main(String args[])
    {
        // Creating an empty Vector
        Vector<String> vec_tor = new Vector<String>();
  
        // Use add() method to add elements into the Vector
        vec_tor.add("Welcome");
        vec_tor.add("To");
        vec_tor.add("Geeks");
        vec_tor.add("4");
        vec_tor.add("Geeks");
  
        // Displaying the Vector
        System.out.println("Vector:  " + vec_tor);
  
        // Verifying if the Vector is empty or not
        System.out.println("Is the Vector empty? "
                           + vec_tor.isEmpty());
  
        // Clearing the Vector
        vec_tor.clear();
  
        // Displaying the Vector
        System.out.println("Vector after clear(): "
                           + vec_tor);
  
        // Verifying if the Vector is empty or not
        System.out.println("Is the Vector empty? "
                           + vec_tor.isEmpty());
    }
}

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Output:

Vector:  [Welcome, To, Geeks, 4, Geeks]
Is the Vector empty? false
Vector after clear(): []
Is the Vector empty? true

Program 2:

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// Java code to illustrate isEmpty()
import java.util.*;
  
public class VectorDemo {
    public static void main(String args[])
    {
        // Creating an empty Vector
        Vector<Integer> vec_tor = new Vector<Integer>();
  
        // Displaying the Vector
        System.out.println("Vector:  " + vec_tor);
  
        // Verifying if the Vector is empty or not
        System.out.println("Is the Vector empty? "
                           + vec_tor.isEmpty());
    }
}

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Output:

Vector:  []
Is the Vector empty? true

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