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CopyOnWriteArrayList equals() method in Java with Examples

  • Last Updated : 04 Jan, 2019

CopyOnWriteArrayList equals() method is used to compare two lists. It compares the lists as, both lists should have the same size, and all corresponding pairs of elements in the two lists are equal.

Syntax:

boolean equals(Object o)

Parameters: This function has a single parameter which is object to be compared for equality.

Returns: This method returns True if lists are equal.

Below programs show the implementation of this method.



Program 1:




// Java code to show the implementation of
// addAll method in list interface
  
import java.util.*;
  
public class GfG {
  
    // Driver code
    public static void main(String[] args)
    {
  
        // Initializing a list of type Linkedlist
        CopyOnWriteArrayList<Integer> l
            = new CopyOnWriteArrayList<>();
        l.add(10);
        l.add(15);
        l.add(20);
        System.out.println(l);
  
        // Initializing another list
        CopyOnWriteArrayList<Integer> l2
            = new CopyOnWriteArrayList<Integer>();
        l2.add(100);
        l2.add(200);
        l2.add(300);
        System.out.println(l2);
  
        if (l.equals(l2))
            System.out.println("Equal");
        else
            System.out.println("Not equal");
    }
}

Program 2:




// Java code to show the implementation of
// addAll method in list interface
  
import java.util.*;
  
public class GfG {
  
    // Driver code
    public static void main(String[] args)
    {
  
        // Initializing a list of type Linkedlist
        CopyOnWriteArrayList<Character>
            l = new CopyOnWriteArrayList<Character>();
        l.add('G');
        l.add('E');
        l.add('E');
        l.add('K');
        l.add('S');
        System.out.println(l);
  
        // Initializing another list
        CopyOnWriteArrayList<Character>
            l2 = new CopyOnWriteArrayList<Character>();
        l2.add('G');
        l2.add('E');
        l2.add('E');
        l2.add('K');
        l2.add('S');
        System.out.println(l2);
  
        if (l.equals(l2))
            System.out.println("Equal");
        else
            System.out.println("Not equal");
    }
}

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