Manipulating Character in JAVA.(UpperCase | isLowercase | toUppercase | toLowerCase | isLetterOrDigit | isWhitespace in JAVA)

CODING:
class Manipulating Character
{
 public static void main(String[] args)
  {
   char c='K';
   System.out.println("Char C=" + c);
   if(Character.isUpperCase(c)){
      System.out.println(c + " is UpperCase");
    }
    else{
      System.out.println(c + " is Not UpperCase"); 
    }
   if(Character.isLowerCase(c)){
      System.out.println(c + " is UpperCase");
    }
    else{
      System.out.println(c + " is Not UpperCase"); 
    }
   c=Character.toLowerCase(c);
      System.out.println("After to LowerCase:"+ c );
   c=Character.toUpperCase(c);
      System.out.println("After to UpperCase:"+ c );
   if(Character.isLetterOrDigit(c)){
      System.out.println(c + " is Letter Or Digit.");
    }
    else{
      System.out.println(c + " is Not Letter Or Digit."); 
    }
   if(Character.isWhitespace(c)){
      System.out.println(c + " is Whitespace");
    }
    else{
      System.out.println(c + " is Not Whitespace"); 
    }
  }
}