RetroSearch Browse

Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://www.geeksforgeeks.org/java/abstractlist-equals-method-in-java-with-examples/ below:

AbstractList equals() method in Java with Examples

Last Updated : 11 Jul, 2025

The

equals()

method of

java.util.AbstractList

class is used to compare the specified object with this list for equality. Returns true if and only if the specified object is also a list, both lists have the same size, and all corresponding pairs of elements in the two lists are equal. (Two elements e1 and e2 are equal if (e1==null ? e2==null : e1.equals(e2)).) In other words, two lists are defined to be equal if they contain the same elements in the same order.

Syntax:

public boolean equals(Object o)

Parameters:

This method takes the

object o

as a parameter to be compared for equality with this list.

Returns Value:

This method returns

true

if the specified object is equal to this list. Below are the examples to illustrate the

equals()

method.

Example 1: Java


 // Java program to demonstrate
// equals() method
// for String value

import java.util.*;

public class GFG1 {
    public static void main(String[] argv)
        throws Exception
    {

        try {

            // Creating object of AbstractList<String>
            AbstractList<String>
                arrlist1 = new ArrayList<String>();

            // Populating arrlist1
            arrlist1.add("A");
            arrlist1.add("B");
            arrlist1.add("C");
            arrlist1.add("D");
            arrlist1.add("E");

            // print arrlist1
            System.out.println("First ArrayListlist : "
                               + arrlist1);

            // Creating another object of AbstractList<String>
            AbstractList<String>
                arrlist2 = new ArrayList<String>();

            // Populating arrlist2
            arrlist2.add("A");
            arrlist2.add("B");
            arrlist2.add("C");
            arrlist2.add("D");
            arrlist2.add("E");

            // print arrlist2
            System.out.println("Second ArrayList : "
                               + arrlist2);

            // comparing first ArrayList to another
            // using equals() method
            boolean value = arrlist1.equals(arrlist2);

            // print the value
            System.out.println("Are both list equal : "
                               + value);
        }

        catch (NullPointerException e) {
            System.out.println("Exception thrown : " + e);
        }
    }
}

Output:

First ArrayListlist : [A, B, C, D, E]
Second ArrayList : [A, B, C, D, E]
Are both list equal : true

Example 2: Java


 // Java program to demonstrate
// equals() method
// for Integer value

import java.util.*;

public class GFG1 {
    public static void main(String[] argv)
        throws Exception
    {

        try {

            // Creating object of AbstractList<Integer>
            AbstractList<Integer>
                arrlist1 = new ArrayList<Integer>();

            // Populating arrlist1
            arrlist1.add(10);
            arrlist1.add(20);
            arrlist1.add(30);
            arrlist1.add(40);
            arrlist1.add(50);

            // print arrlist1
            System.out.println("First ArrayListlist : "
                               + arrlist1);

            // Creating another object of AbstractList<Integer>
            AbstractList<Integer>
                arrlist2 = new ArrayList<Integer>();

            // Populating arrlist2
            arrlist2.add(10);
            arrlist2.add(20);
            arrlist2.add(30);

            // print arrlist2
            System.out.println("Second ArrayList : "
                               + arrlist2);

            // comparing first ArrayList to another
            // using equals() method
            boolean value = arrlist1.equals(arrlist2);

            // print the value
            System.out.println("Are both list equal : "
                               + value);
        }

        catch (NullPointerException e) {
            System.out.println("Exception thrown : " + e);
        }
    }
}

Output:

First ArrayListlist : [10, 20, 30, 40, 50]
Second ArrayList : [10, 20, 30]
Are both list equal : false

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4