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

public class CountCodeLines {
static int codeLines = 0;

static int whiteLines = 0;

static int commentLines = 0;

static int tatolLines = 0;

static boolean bComment = false;

public static void main(String[] args) {

StringBuffer pathName = new StringBuffer(
"/home/xj/bin/eclipse/workspace/hku.cs.lunuo.test/src/hku/cs/test");
ComputeDirectoryAndFiles(pathName, 0);
System.out.println("Code Lines : "
+ (codeLines = tatolLines - commentLines - whiteLines));
System.out.println("White Lines : " + whiteLines);
System.out.println("Comment Lines : " + commentLines);

}

public static void ComputeDirectoryAndFiles(StringBuffer pathName, int level) {
File directory = new File(pathName.toString());
File[] files = directory.listFiles();
String prefix = "";
for (int i = 0; i < files.length; i++) {
prefix += "** ";
}
if (directory.isDirectory()) {
for (int i = 0; i < files.length; i++) {
if (files[i].isFile()
&& files[i].getName().matches(
"^[a-zA-Z[^0-9]]\\w*.java$")) {

computeLines(files[i]);
}
if (files[i].isDirectory()) {

pathName.append("/" + files[i].getName());
level++;
ComputeDirectoryAndFiles(pathName, level);
int start = pathName.toString().length()
- files[i].getName().length() - 1;
int end = pathName.toString().length();
pathName.delete(start, end);

level--;
}
}
}
}

public static void computeLines(File file) {
BufferedReader bf = null;

try {
bf = new BufferedReader(new FileReader(file));
String lineStr = "";
while ((lineStr = bf.readLine()) != null) {
// 总行数
tatolLines++;
// 计算空行
whiteLines(lineStr);
// 计代码行数
commendLines(lineStr);
// 计算代码的行数
// codeLines(lineStr);
}
} catch (FileNotFoundException e) {
System.out.println("文件没有找到");
} catch (IOException ee) {
System.out.println("输入输出异常　");
} finally {
if (bf != null) {
try {
bf.close();
bf = null;
} catch (Exception e) {
System.out.println("关闭BufferReader时出错");
}
}
}
}

public static void whiteLines(String lineStr) {
if (lineStr.matches("^[\\s&&[^\\n]]*$")) {
whiteLines++;
}

}

public static void commendLines(String lineStr) {

// 判断是否是一个注释行
// 这里是单行注释的如 /*..... */或/**.... */
if (lineStr.matches("\\s*/\\*{1,}.*(\\*/).*")) {

commentLines++;
}
/**
* 这里是多行注释的
*/
// 这里的是当开始为/**或/*但是没有 */ 关闭时
else if (lineStr.matches("\\s*/\\*{1,}.*[^\\*/].*")) {

commentLines++;
bComment = true;
} else if (true == bComment) {

commentLines++;
if (lineStr.matches("\\s*[\\*/]+\\s*")) {
bComment = false;
}
} else if (lineStr.matches("^[\\s]*//.*")) {

commentLines++;
}

}

}