问题补充：
import java.io.*;
public class Count {
//method countChars
//…………………….
public static void main(String[] args) throws Exception
{
if (args.length >= 1)
countChars(new FileReader(args[0]));
else
System.err.println("Usage: Count filename");
}
}
网友回答
public static void countChars(FileReader in)
throws IOException { int charC = 0;
int lineC = 0;
String line; BufferedReader bf = new BufferedReader(in); while ((line=bf.readLine()) != null) { charC += line.length(); lineC++; }
System.out.println("Counted " + charC + " chars "+"and "+lineC+" lines.");
}