อยากถามเรื่อง java.lang.ArrayIndexOutOfBoundsException

import java.util.Scanner;
class add
{
	public static void main (String[]args)
	{
		int code;
		final int d = 100;
		Scanner sc = new Scanner(System.in);
		Scanner sd = new Scanner(System.in);
		System.out.print("Enter Name : ");
		String name = sd.nextLine();
		char ar[] = name.toCharArray();
		for(int i = 0;i <= ar.length;i++)
		{
			int k =ar[i]+5 ;
			char end  = (char) k ;
			System.out.print(end);
		
		}	
		
			
	}
			
}