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Arraylist Sort In Java

Last Updated : Jul 1, 2023

Arraylist Sort In Java

In this article we will show you the solution of arraylist sort in java, the class offered by the Collection framework is ArrayList. The java.util package contains definitions for the collection framework in Java.

The elements are dynamically stored in an array list.

ArrayList is more adaptable than an array since it has no size limit. The data is kept in an unordered fashion in an array list.

In certain situations, we must reorder the facts in a systematic way.

In Java, there are two different forms of array lists.

The first is an array list of objects from the Wrapper class, and the second is an array list of objects that have been specifically defined by the user.

Now move to the concept of arraylist sort in java.

Step By Step Guide On Arraylist Sort In Java :-

A collection framework is available in Java that offers class like LinkedList, ArrayList, and others where many elements or objects can be kept, as well as interface like List, Set, Stack, and Queue.

The elements are frequently kept in an unsorted stateWe might use a variety of techniques to arrange the data.

The two ways to sort an array list are in ascending order and descending order.

ArrayLists can be sorted in Java using two different methods, one for ascending and one for descending.

import java.util.*;
public class MineClass{
public static void main(String args[]){
ArrayList<Int> list = new ArrayList<Int>();
list.add(10);
list.add(5);
list.add(20);
list.add(25);
list.add(35);
list.add(30);
list.add(80);
list.add(50);
list.add(90);
list.add(75);
list.add(15);
System.out.println("Before Sorting: "+ list);
Collections.sort(list);
System.out.println("After Sorting: "+ list);
    }
}
  1. Here, we implement the sort() function of the collection class in a Java application to sort an arraylist in ascending order.
  2. The collection framework, collection classes, date and time classes, event model classes, internationalisation classes, and other utility classes are all included in the package java.util, which is imported in the first line of code.
  3. You may access all of these classes and functions by importing this package.
  4. A public class called MineClass is then created and its main function is called.
  5. Afterwards, we added additional elements to an ArrayList with type Integer that we had previously built.
  6. The unsorted arraylist is then printed using system.out.println
  7. After that, we sorted the ArrayList throughout ascending order using the sort() function of the Collections class, passing the object of a ArrayList class as a parameter.
  8. We then printed the ArrayList's items both before and after the sort.

Conclusion :-

Hence, we were able to understand how to sort an arraylist in Java. We also discovered that this could be done by utilising the sort() function of the Collections class.

This accepts the object of an ArrayList to be sorted as an argument and produces an ArrayList that has been sorted in ascending order in accordance with the natural order of its contents.

The fact that ArrayList has no size restrictions is a benefit. It offers greater flexibility than the conventional array.

It might contain duplicate components. Due to the fact that it supports the List interface, we can also use all of its functions.

I hope this article on arraylist sort in java helps you and the steps and method mentioned above are easy to follow and implement.

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Experienced Computer Programmer with a broad range of experience in technology. Strengths in application development and Object Oriented architecture design, front end programming, usability and multimedia technology. Expert in coding languages such as C, C++ Java, JavaScript, PHP and more.

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