public class CharAt
{
   public static void main(String[] args)  throws Exception
   {
      String s = "ABC123";

      for ( int i = 0; i < s.length(); i++)
      {
         System.out.println( s.charAt(i) );
         System.out.println( "Binary repr: " +
                              Integer.toBinaryString(s.charAt(i)) );
         System.out.println( "Decimal repr:" +
                              Integer.toString(s.charAt(i)) );
         System.out.println();
      }
   }
}