Open In App

How to sort an ArrayList in Ascending Order in Java

Improve
Improve
Like Article
Like
Save
Share
Report

Given an unsorted ArrayList, the task is to sort this ArrayList in ascending order in Java.

Examples:

Input: Unsorted ArrayList: [Geeks, For, ForGeeks, GeeksForGeeks, A computer portal]
Output: Sorted ArrayList: [A computer portal, For, ForGeeks, Geeks, GeeksForGeeks]

Input: Unsorted ArrayList: [Geeks, For, ForGeeks]
Output: Sorted ArrayList: [For, ForGeeks, Geeks]

Approach: An ArrayList can be Sorted by using the sort() method of the Collections Class in Java. This sort() method takes the collection to be sorted as the parameter and returns a Collection sorted in the Ascending Order by default.

Syntax:

Collections.sort(ArrayList);

Below is the implementation of the above approach:




// Java program to demonstrate
// How to sort ArrayList in ascending order
  
import java.util.*;
  
public class GFG {
    public static void main(String args[])
    {
  
        // Get the ArrayList
        ArrayList<String>
            list = new ArrayList<String>();
  
        // Populate the ArrayList
        list.add("Geeks");
        list.add("For");
        list.add("ForGeeks");
        list.add("GeeksForGeeks");
        list.add("A computer portal");
  
        // Print the unsorted ArrayList
        System.out.println("Unsorted ArrayList: "
                           + list);
  
        // Sorting ArrayList in ascending Order
        // using Collection.sort() method
        Collections.sort(list);
  
        // Print the sorted ArrayList
        System.out.println("Sorted ArrayList "
                           + "in Ascending order : "
                           + list);
    }
}


Output:

Unsorted ArrayList: [Geeks, For, ForGeeks, GeeksForGeeks, A computer portal]
Sorted ArrayList in Ascending order : [A computer portal, For, ForGeeks, Geeks, GeeksForGeeks]


Last Updated : 19 Apr, 2023
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads