Java统计代码行数

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
/**
 * description: 统计代码行数
 * @author xyc 创建时间：2014-7-24
 */
public class LineCounter {
 List<File> list = new ArrayList<File>();
 int linenumber = 0;
 FileReader fr = null;
 BufferedReader br = null;
 public void counter(String projectName) {
  projectName = projectName + File.separator + "src";
  System.out.println(projectName);
  File file = new File(projectName);
  File files[] = null;
  files = file.listFiles();
  addFile(files);
  isDirectory(files);
  readLinePerFile();
  System.out.println("Totle:" + linenumber + "行");
 }
 // 判断是否是目录
 public void isDirectory(File[] files) {
  for (File s : files) {
   if (s.isDirectory()) {
    File file[] = s.listFiles();
    addFile(file);
    isDirectory(file);
    continue;
   }
  }
 }
 //将src下所有文件组织成list
 public void addFile(File file[]) {
  for (int index = 0; index < file.length; index++) {
   list.add(file[index]);
  }
 }
 //读取非空白行
 public void readLinePerFile() {
  try {
   for (File s : list) {
    int yuan = linenumber;
    if (s.isDirectory()) {
     continue;
    }
    fr = new FileReader(s);
    br = new BufferedReader(fr);
    String i = "";
    while ((i = br.readLine()) != null) {
     if (isBlankLine(i))
      linenumber++;
    }
    System.out.print(s.getName());
    System.out.println("\t\t有" + (linenumber - yuan) + "行");
   }
  } catch (Exception e) {
   e.printStackTrace();
  } finally {
   if (br != null) {
    try {
     br.close();
    } catch (Exception e) {
    }
   }
   if (fr != null) {
    try {
     fr.close();
    } catch (Exception e) {
    }
   }
  }
 }
 //是否是空行
 public boolean isBlankLine(String i) {
  if (i.trim().length() == 0) {
   return false;
  } else {
   return true;
  }
 }
 public static void main(String args[]) {
  LineCounter lc = new LineCounter();
  String projectName = "D:/workspace/paytest4/payment";
  lc.counter(projectName);
 }
}