CodeCount

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class CodeCount {
    public static void main(String[] args) throws FileNotFoundException {
        if (args.length == 0) {
            System.out.println("==> Usage: java com.ebao.misc.CodeCount [directory]");
            System.exit(1);
        }
        File basedir = new File(args[0]);
        if (!basedir.isDirectory()) {
            System.out.println("==> Error: " + args[0] + " is not a directory");
            System.exit(1);
        }
        Lookup(basedir);
    }

    private static void Lookup(File dir) throws FileNotFoundException {
        File[] names = dir.listFiles();
        for (File name : names) {
            if (name.isFile()) {
                int lineCount = Count(name);
                System.out.printf("%20s%10d\n", name.getName(), lineCount);
            } else if (name.isDirectory()) {
                Lookup(name);
            } else {
                System.out.println("==> Error: " + name.getName() + " is invalid");
                System.exit(1);
            }
        }
    }


    /*
    /*
     * @param file
     * @return
     * @throws FileNotFoundException
     */
    private static int Count(File file) throws FileNotFoundException {
        Scanner in = new Scanner(file);
        String line = null;
        boolean commentMode = false;
        int lineCount = 0;
        while (in.hasNextLine()) {
            line = in.nextLine().trim();
            if (line.startsWith("//") || line.equals("")) {
                continue;
            }
            if (line.startsWith("/*")) {
                commentMode = true;
            }
            if (commentMode && line.endsWith("*/")) {
                commentMode = false;
                continue;
            }
            if (!commentMode)
                ++lineCount;
        }
        in.close();
        return lineCount;
    }
}