java实现代码统计小程序

package rexExp; import java.io.BufferedReader;import java.io.File;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.IOException; public class CodeCounter { //三个静态变量存储行数 static long normalLines = 0; static long commentLines = 0; static long whileLines = 0;  public static void main(String[] args) { String pathname = "E://testeclipseworkspace//JavaLearn//src//collection"; File file = new File(pathname); File[] codeFiles = file.listFiles();//找到文件夹下面的所有子文件 //文件必须是以.java结尾，用正则表达式来验证 for(File child : codeFiles){  if (child.getName().matches(".*//.java$")) {  parse(child);  } }   System.out.println("normalLines:" + normalLines); System.out.println("commentLines:" + commentLines); System.out.println("whileLines:" + whileLines);  }  private static void parse(File file) { BufferedReader bReader = null; boolean comment = false; try {  bReader = new BufferedReader(new FileReader(file));  //读其中的每一行  String line = "";  while((line=bReader.readLine()) != null){  line = line.trim();//去掉首尾空格  //统计空行的行数  if (line.matches("^[//s&&[^//n]]*$")) {   whileLines++;  }  //统计注释的行数  else if (line.startsWith("/*") && !line.endsWith("*/")) {   commentLines++;   //如果遇到"/*"，说明注释开始了   comment = true;  }  else if (line.startsWith("/*") && line.endsWith("*/")) {   commentLines++;  }  else if (true == comment) {   commentLines++;   if (line.endsWith("*/")) {   comment = false;   }  }  else if(line.startsWith("//")){   commentLines++;  }  else {   normalLines++;  }  } } catch (FileNotFoundException e) {  e.printStackTrace(); } catch (IOException e) {  e.printStackTrace(); }finally {  if (bReader != null) {  try {   bReader.close();  } catch (IOException e) {   e.printStackTrace();  }  } } }}