CopyOnWriteArrayList equals() method in Java with Examples

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"); 
    } 
} 

My Personal Notes

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