Home » Java programming language

Java Vector contains() Method with Example

Vector Class contains() method: Here, we are going to learn about the contains() method of Vector Class with its syntax and example.
Submitted by Preeti Jain, on March 15, 2020

Vector Class contains() method

  • contains() method is available in java.util package.
  • contains() method is used to check whether the given object (ob) exists or not exists in this Vector.
  • contains() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • contains() method may throw an exception at the time of checking the existence of the given object.
    • ClassCastException: This exception may throw when the given object is incompatible to check.
    • NullPointerException: This exception may throw when the given parameter is null exists.

Syntax:

    public boolean contains(Object ob);

Parameter(s):

  • Object ob – represents the object to check its existence in this Vector.

Return value:

The return type of the method is boolean, it returns true when the given object exists otherwise it returns false.

Example:

// Java program to demonstrate the example 
// of boolean contains(Object ob) method 
// of Vector 

import java.util.Vector;

public class ContainsOfVector {
    public static void main(String[] args) {
        // Instantiates a Vector object  with
        // initial capacity of "10"
        Vector < String > v = new Vector < String > (10);

        // By using add() method is to add the
        // elements in this v
        v.add("C");
        v.add("C++");
        v.add("JAVA");

        // Display Vector 
        System.out.println("v: " + v);

        // By using contains(JAVA) method is to
        // check whether the given object "JAVA"
        // exists or not exists
        boolean status = v.contains("JAVA");

        // Display status
        System.out.println("v.contains(JAVA): " + status);
    }
}

Output

v: [C, C++, JAVA]
v.contains(JAVA): true





Comments and Discussions

Ad: Are you a blogger? Join our Blogging forum.





Languages: » C » C++ » C++ STL » Java » Data Structure » C#.Net » Android » Kotlin » SQL
Web Technologies: » PHP » Python » JavaScript » CSS » Ajax » Node.js » Web programming/HTML
Solved programs: » C » C++ » DS » Java » C#
Aptitude que. & ans.: » C » C++ » Java » DBMS
Interview que. & ans.: » C » Embedded C » Java » SEO » HR
CS Subjects: » CS Basics » O.S. » Networks » DBMS » Embedded Systems » Cloud Computing
» Machine learning » CS Organizations » Linux » DOS
More: » Articles » Puzzles » News/Updates


© https://www.includehelp.com some rights reserved.