reverseAString.java

//Question: Reverse each word in a given sentence.
package stringBuilder;
import java.util.Scanner;
public class reverseAString {
    public static void main(String[] args) {
        Scanner sc = new Scanner (System.in);
        System.out.print("Enter the string: ");
        StringBuilder sb = new StringBuilder(sc.nextLine());
        int n = sb.length();
        int i = 0, j = 0;
        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.print("Final string is: " + sb);
    }
    public static void reverse(StringBuilder ab, int i, int j) {
        char temp;
        while(i<j){
        temp = ab.charAt(i);
        ab.setCharAt(i, ab.charAt(j));
        ab.setCharAt(j, temp);
        i++; j--;
        }
    }
       
}