正则表达式小应用－代码统计小程序

来源：互联网发布：王者荣耀诸葛亮知乎编辑：程序博客网时间：2024/04/27 16:00

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class CodeCount {

static long normalLines = 0;
static long commentLines = 0;
static long whiteLines = 0;

public static void main(String[] args) {
  File f = new File("D://JavaProject//TankWar//src");
  File[] codeFiles = f.listFiles();
System.out.println("" + codeFiles.length);
  for(File child:codeFiles){   //增强for循环
   if(child.getName().matches(".*//.java$")) {
    parse(child);
   }
  }

  System.out.println("normalLines:" + normalLines);
  System.out.println("commentLines:" + commentLines);
  System.out.println("whiteLines:" + whiteLines);
}

private static void parse(File f) {
  BufferedReader br = null;
  boolean comment = false;
  try {
   br = new BufferedReader(new FileReader(f));
   String line = "";
   while((line = br.readLine()) != null){
    line = line.trim();
    if(line.matches("^[//s&&[^//n]]*")){
     whiteLines ++;
    } else if(line.startsWith("/*") && !line.endsWith("*/")) {
     comment = true;
     commentLines ++;
    } else if(line.endsWith("*/")) {
     comment =false;
     commentLines ++;
    }else if(true == comment) {
     commentLines ++;
    } else if(line.startsWith("/*") && line.endsWith("*/")) {
     commentLines ++;
    } else if(line.startsWith("//")) {
     commentLines ++;
    } else {
     normalLines ++;
    }
   }
  } catch (FileNotFoundException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  }

}

}