// the reverse() Method. classGFG{ publicstaticvoidmain(String[]args) { // create a StringBuilder object // with a String pass as parameter StringBuilderstr =newStringBuilder("AAAABBBCCCC"); // print string System.out.println("String = " +str.toString()); // reverse the string StringBu...
util.*; // Main class // Collectionsorting public class GFG { // Main driver method public static void main(String[] args) { // Creating a list of integers for which we // create an empty ArrayList by // declaring object of ArrayList class ArrayList<Integer> al = new ArrayList<...
GFG { // Main driver method public static void main(String[] args) { // Creating an array to be sorted in descending // order Integer[] arr = { 30, 20, 40, 10 }; // Collections.sort method is sorting the // elements of arr[] in descending order // later on Arrays.sort() ...
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