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Vector contains() Method in Java

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  • Last Updated : 17 Aug, 2018

The java.util.vector.contains() method is used to check whether a specific element is present in the Vector or not. So basically it is used to check if a vector contains any particular element or not.

Syntax:

Vector.contains(Object element)

Parameters: This method takes a mandatory parameter element which is of the type of vector. This is the element that needs to be tested if it is present in the vector or not.

Return Value: This method returns True if the element is present in the vector otherwise it returns False.

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

Program 1:




// Java code to illustrate contains()
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);
  
        // Check for "Geeks" in the Vector
        System.out.println("Does the vector contains 'Geeks'? "
                           + vec_tor.contains("Geeks"));
  
        // Check for "4" in the Vector
        System.out.println("Does the Vector contains '4'? "
                           + vec_tor.contains("4"));
  
        // Check if the Queue contains "No"
        System.out.println("Does the Queue contains 'No'? "
                           + vec_tor.contains("No"));
    }
}
Output:
Vector: [Welcome, To, Geeks, 4, Geeks]
Does the vector contains 'Geeks'? true
Does the Vector contains '4'? true
Does the Queue contains 'No'? false

Program 2:




// Java code to illustrate contains()
import java.util.*;
  
public class VectorDemo {
    public static void main(String args[])
    {
        // Creating an empty Vector
        Vector<Integer> vec_tor = new Vector<Integer>();
  
        // Use add() method to add elements into the Vector
        vec_tor.add(10);
        vec_tor.add(15);
        vec_tor.add(30);
        vec_tor.add(20);
        vec_tor.add(5);
  
        // Displaying the Vector
        System.out.println("Vector: " + vec_tor);
  
        // Check for "Geeks" in the Vector
        System.out.println("Does the vector contains 'Geeks'? "
                           + vec_tor.contains("Geeks"));
  
        // Check for "4" in the Vector
        System.out.println("Does the Vector contains '4'? "
                           + vec_tor.contains("4"));
  
        // Check if the vector contains "No"
        System.out.println("Does the Vector contains 'No'? "
                           + vec_tor.contains("No"));
    }
}
Output:
Vector: [10, 15, 30, 20, 5]
Does the vector contains 'Geeks'? false
Does the Vector contains '4'? false
Does the Vector contains 'No'? false

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