输入一行字符，分别统计出包含英文字母、空格、数字和其它字符的个数

import java.util.Scanner;

public class GetNumDifChar {

public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
String str = scan.nextLine();
int isLetter = 0;
int isSpace = 0;
int isDigit = 0;
int isOther = 0;
for (int i = 0; i < str.length(); i++) {
if(Character.isLetter(str.charAt(i)))
isLetter++;
else if(Character.isSpace(str.charAt(i)))
isSpace++;
else if(Character.isDigit(str.charAt(i)))
isDigit++;
else
isOther++;

}
System.out.println(isLetter);
System.out.println(isSpace);
System.out.println(isDigit);
System.out.println(isOther);
}

}