Java Program on Character Wrapper Class

Program 1

package dataflair;

public class TestCharacter 
{
       public static void main(String[] args) 
       {
//            Character C1=new Character('A');
//            Character C2=97;
//            System.out.println(C1);
//            System.out.println(C2);
//           System.out.println(Character.isLetter('A')); //true
//           System.out.println(Character.isLetter('a')); //true
//           System.out.println(Character.isLetter(65)); //true
//           System.out.println(Character.isLetter(99)); //true
//           System.out.println(Character.isLetter('6')); //false
//           System.out.println(Character.isLetter('@')); //false
//           System.out.println(Character.isDigit('9'));
//           System.out.println(Character.isDigit('\n'));
//           System.out.println(Character.isDigit('@'));
//           System.out.println(Character.isDigit('A'));
//            System.out.println(Character.isLetterOrDigit('A'));  // true
//            System.out.println(Character.isLetterOrDigit('8'));// true
//            System.out.println(Character.isLetterOrDigit('#'));//false
//            System.out.println(Character.isLetterOrDigit('\t'));//false
//           System.out.println(Character.isWhitespace('\n'));
//           System.out.println(Character.isWhitespace('\t'));
//           System.out.println(Character.isWhitespace(' '));
//           
//           System.out.println(Character.isWhitespace('A'));
//           System.out.println(Character.isWhitespace('9'));
//           System.out.println(Character.isWhitespace('#'));
//           System.out.println(Character.isUpperCase('9'));
//           System.out.println(Character.isUpperCase('@'));
//           System.out.println(Character.isLowerCase('A'));
//           System.out.println(Character.isLowerCase('a'));
//             System.out.println(Character.toLowerCase('a'));
//             System.out.println(Character.toUpperCase('N'));
             //System.out.println(Character.isSpaceChar('\t'));
               String str="abc123_456hello778 # @ * bye";
               int dg=0,lt=0,sc=0,sp=0;
               char ch;
               for(int i=0;i<str.length();i++)
               {
                   ch=str.charAt(i);
                   if(Character.isLetter(ch))
                       lt++;
                   else
                   if(Character.isDigit(ch))
                       dg++;    
                   else
                   if(Character.isSpaceChar(ch))
                       sp++;        
                   else
                       sc++;
               }
           System.out.println("Total Letter: "+lt);
           System.out.println("Total Digit: "+dg);
           System.out.println("Total Space: "+sp);
           System.out.println("Total Special Chracter: "+dg);
       }
    
}