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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