Reverse_string.java

import java.util.*;

public class Reverse_string {
    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter the String which You want to reverse:");//Ritesh Kumar=hsetiR ramuK
        StringBuilder sb = new StringBuilder(sc.nextLine());
        int i = 0;
        int j = 0;
        int n = sb.length();

        while (j < n) {
            if (sb.charAt(j) != ' ') {
                j++;
            } else {
                reverse(sb, i, j - 1);
                i = j + 1;
                j = i;
            }
        }
        reverse(sb, i, j - 1);
        System.out.println(sb);
        sc.close();
    }

    public static void reverse(StringBuilder sb, int i, int j) {
        while (i <= j) {
            char temp = sb.charAt(i);
            sb.setCharAt(i, sb.charAt(j));  // Corrected line
            sb.setCharAt(j, temp);
            i++;
            j--;
        }
        
    }
}