How to sort an ArrayList in Ascending Order in Java
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); } } |
Unsorted ArrayList: [Geeks, For, ForGeeks, GeeksForGeeks, A computer portal] Sorted ArrayList in Ascending order : [A computer portal, For, ForGeeks, Geeks, GeeksForGeeks]
Recommended Posts:
- How to sort an ArrayList in Descending Order in Java
- Sort an array of string of dates in ascending order
- Sort first half in ascending and second half in descending order | Set 2
- How to sort TreeSet in descending order in Java?
- ArrayList of ArrayList in Java
- Sort only non-prime numbers of an array in increasing order
- Java.util.ArrayList.addall() method in Java
- ArrayList in Java
- Arraylist.contains() in Java
- Java.util.Arraylist.indexOf() in Java
- Java.util.ArrayList.add() Method in Java
- Custom ArrayList in Java
- Array of ArrayList in Java
- Reverse an ArrayList in Java
- Synchronization of ArrayList in Java
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.