Java - Rotacion a la derecha de una cadena

import java.io.IOException;

public class CadenaNCaractaeres {

	public static void main(String[] args) {

		char cadena[] = new char [40];

		int car,i=0,aux=0;

		 try

		    {

		      System.out.println("Escriba una cadena de caracteres:");

		      while ((car = System.in.read()) != '\r' && i < cadena.length)

		      {

		      cadena[i] = (char)car;

		      System.out.print(cadena[i]);

		      i++;

		      }

		      System.out.print(" ");

		      car=cadena[i-1];

		      i=0;

		      for(int j=0 ; cadena[j]!='\0';j++)

		      {

		      while (cadena[i] != '\0' )

		      {

		    	      aux=cadena[i];

		    		  cadena[i]=(char)car;

		    		  car=aux;

		    		  System.out.print(cadena[i]);

		    	  i++;

		      }

		      System.out.print(" ");

		      car=cadena[i-1];

		      i=0;

		      }

		    }

		    catch(IOException ignorada) {}

	}

}