Java program to count the letters, spaces, numbers and other characters of an input string

CODE:
import java.util.*;
class prac3A
{
public static void main(String args[])
{
    Scanner input=new Scanner(System.in);
System.out.print("Enter A String: ");
String str=input.nextLine();
     int letter=0,space=0,digit=0,other=0;
   char ch[]=str.toCharArray();
for(int i=0;i<str.length();i++)
{
   if(Character.isLetter(ch[i]))
   {
       letter++;
  }
  else if(Character.isDigit(ch[i]))
  {
     digit++;
}
else if(Character.isSpaceChar(ch[i]))
           {
      space++;
  }
  else{
   other++;
   }
   }
System.out.println("Letter are: "+letter);
System.out.println("Space are: "+space);
System.out.println("Digit are: "+digit);
System.out.println("Other: "+other);    
}

}