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JAVA Recursion Code Issue

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I am attempting to learn Java and am having a time of it. I am wanting to write a program that will allow a user to input number...then output them in reverse order. If someone would be so kind as to look at it and provide me with suggestions or hints...or for those who are extremely kind hearted, feel free to tweak it for me and repost. On behalf of all those who receive assistance here, "Thanks in advance!"

// revstring - recursively reverse a string
// Name:
// Date:
import java.io.*;

public class RevString

// main method reads a string input by the user and
// calls recursive methods that print string in
// and return reversed string
public static void main(String[] args) throws IOException
InputStreamReader isr = new InputStreamReader (System.in);
BufferedReader stdin = new BufferedReader (isr);

System.out.println("Enter a String");
String input = stdin.readLine();
System.out.print("The input in reverse is --> ");


// String strrev = retrev(input);
// System.out.println();
// System.out.println("The returned string is --> " + strrev);

// ****************************************************
// recursive method that prints the reverse of a string
// public static void rev (string r)
String strRemaining = "1";
String str = String.valueOf®;
int iLen = str.length(); //get length for
indexing substrings

if (iLen <= 1)

//save the x-1 characters of string
strRemaining = str.substring(0, (iLen - 1));
//put the last character into substring
str = str.substring((iLen - 1), iLen);
//print last character
//revert string back to number
r = Integer.valueOf(strRemaining).intValue();
//call itself recursively
// recursive method that returns the reverse of a string
// public static String retrev(String r)
// {
// }
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