List contains() method in Java with Examples

// Java Program to Demonstrate
// List contains() Method
import java.util.*;

class GFG 
{
    public static void main (String[] args) 
    {
      	List<Integer> l = new ArrayList<>();
      
      	l.add(1);
      	l.add(2);
      
      	// Cheking List contains 2
      	System.out.println("List contains 2 : " + l.contains(2));
      	
      	// Cheking List contains 3
      	System.out.println("List contains 3 : " + l.contains(3));
    }
}

// Java code to demonstrate the working of
// contains() method in List interface

import java.util.*;

class GFG {
    public static void main(String[] args)
    {
        // creating an Empty Integer List
        List<Integer> arr = new ArrayList<Integer>(4);

        // using add() to initialize values
        // [1, 2, 3, 4]
        arr.add(1);
        arr.add(2);
        arr.add(3);
        arr.add(4);

        // use contains() to check if the element
        // 2 exits or not
        boolean ans = arr.contains(2);

        if (ans)
            System.out.println("The list contains 2");
        else
            System.out.println("The list does not contains 2");

        // use contains() to check if the element
        // 5 exits or not
        ans = arr.contains(5);

        if (ans)
            System.out.println("The list contains 5");
        else
            System.out.println("The list does not contains 5");
    }
}

// Java code to demonstrate the working of
// contains() method in List of string

import java.util.*;

class GFG {
    public static void main(String[] args)
    {
        // creating an Empty String List
        List<String> arr = new ArrayList<String>(4);

        // using add() to initialize values
        // ["geeks", "for", "geeks"]
        arr.add("geeks");
        arr.add("for");
        arr.add("geeks");

        // use contains() to check if the element
        // "geeks" exits or not
        boolean ans = arr.contains("geeks");

        if (ans)
            System.out.println("The list contains geeks");
        else
            System.out.println("The list does not contains geeks");

        // use contains() to check if the element
        // "coding" exits or not
        ans = arr.contains("coding");

        if (ans)
            System.out.println("The list contains coding");
        else
            System.out.println("The list does not contains coding");
    }
}