import java.io.*;public class Count {    public static void countChars(InputStream in) throws IOException    {        int count = 0;        while (in.read() != -1)            count++;        System.out.println("Counted " + count + " chars.");    }    public static void main(String[] args) throws Exception    {        if (args.length >= 1)            countChars(new FileInputStream(args[0]));        else            System.err.println("Usage: Count filename");    }}