What's problam?
package zh.codegym.task.task18.task1816;
/*
ABC
*/
import java.io.*;
public class Solution {
public static void main(String[] args) {
try{
FileInputStream ip = new FileInputStream(new File(args[0]));
int szCount = 0;
int zmCount = 0;
while(ip.available() > 0){
int a = ip.read();
char c = (char)a;
if (c >= 'a' && c <= 'z'){
szCount++;
}else if(c >= 'A' && c<='Z'){
zmCount++;
}
}
System.out.println("大写字母数" + zmCount);
System.out.println("小写字母数" + szCount);
ip.close();
}catch(IOException e){
e.printStackTrace();
}
}
}