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]
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