public class Result
    {
        public static void main(String args[])
        {
            char array[]={'a','1','b',' ','A','0'};
            for (int k = 0; k < 5; ++k)
            {
	        if(Character.isDigit(array[k]))
                    System.out.println(array[k]+" is a digit");
                if(Character.isWhitespace(array[k]))
                   System.out.println(array[k]+" is a Whitespace character");
                if(Character.isUpperCase(array[k]))
                   System.out.println(array[k]+" is an Upper case Letter");
                if(Character.isLowerCase(array[k]))
                   System.out.println(array[k]+" is a lower case Letter");
                k = k + 3;
            }
        }
    }