I need help to reverse a string with Java when a user input something, I cant solve this exercise

Question

The exercise ask me to reverse a string from an array using arr.length the was input by user:

import java.util.Scanner;

public class Program
{
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String text = scanner.nextLine();
char[] arr = text.toCharArray();

for(int i = arr.length-1; i < 0; i--) {System.out.println(arr[i]);}

}
}

Answer 1

Vitor , before we are going to help you, you should show your attempt. so please put your code in playground and link it here.

as a general hint to you, you can reverse a string, by using a

▪︎StringBuffer

but it looks that there is also some information missing, as your tags are: array, reverse, string

try to find more about this in reading the java docs

Answer 2

What is the problem? Type conversion? Int cannot convert to String:

import java.util.Scanner;

public class Converter {

public static int toBinary
(int num) {

String binary = "";
while(num > 0) {binary= (num %2) + binary;
num /= 2;
}
return binary;}
}

public class Program {
public static void main(String[ ] args) {
Scanner sc = new Scanner(System.in);
int x = sc.nextInt();
System.out.print(Converter.toBinary(x));
}
}

Answer 3

https://code.sololearn.com/cVsI6O28QIg0/?ref=app