package com.wy.regular;

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

public class RegularTest {

	static long normalLines = 0;
	static long commentLines = 0;
	static long whiteLines = 0;
	
	public static void main(String[] args) {
		File file = new File("D:\\xxx");
		File[] codeFiles = file.listFiles();
		// 檢查每一個檔案的字尾名
		for (File child : codeFiles) {
			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 file) {
		BufferedReader br = null;
		boolean comment = false;
		try {
			br = new BufferedReader(new FileReader(file));
			String line = "";
			while ((line = br.readLine()) != null) {
				// 去掉首尾的空格
				line = line.trim();
				if (line.matches("^[\\s&&[^\\n]]*$")) {
					whiteLines ++;
				} else if (line.startsWith("/*")&& !line.endsWith("*/")) {
					commentLines ++;
					comment = true;
				} 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 (br != null) {
				try {
					br.close();
					br = null;
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}
}