java program to reverse a string without using string inbuilt function

ReverseString.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 * @author Candid Java
 */

public class ReverseString {

 public static void main(String[] args) throws IOException {
  BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  System.out.println("Enter the string");
  String str = br.readLine();

  char[] arr = str.toCharArray();
  for (int i = 0, j = str.length() - 1; i < j; i++, j--) {
   char temp = arr[i];
   arr[i] = arr[j];
   arr[j] = temp;
  }
  System.out.println("Reverse = " + new String(arr));
  br.close();
 }
}

Output

Enter the string : avaj didnac ot emoclew
Reverse = welcome to candid java