课程实验一：目标一：输出该目录下指定类型文件（.cs, .java）的个数、文件的总行数、空行数、注释行数、代码行数

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

public class StaticsCodeingLine {

private static int BlankLine=0;
private static int CommentLine=0;
private static int CodeLine=0;
private static int SumLine=0;

public static void main(String[] args) {
File f = new File("C:/Users/Administrator/Workspaces/MyEclipse 8.5/dhed/src/StaticsCodeingLine.java");
sumCode(f);
}

private static void sumCode(File file) {
BufferedReader br = null;
try {
br = new BufferedReader(new FileReader(file));
String line = "";
try {
while ((line = br.readLine()) != null) {
line = line.trim();
SumLine++;
boolean flag = false;
if (line.matches("^[\\s&&[^\\n]]*$")) {
BlankLine++;
} else if (line.startsWith("/*") && !line.endsWith("*/")) {
CommentLine++;
flag = true;
} else if (flag==true) {
CommentLine++;
if (line.endsWith("*/")) {
flag = false;
}
} else if (line.startsWith("//")) {
CommentLine++;
} else {
CodeLine++;
}
}
} catch (IOException e) {
e.printStackTrace();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
System.out.println("空行数："+BlankLine);
System.out.println("注释行数："+CommentLine);
System.out.println("代码行数："+CodeLine);
System.out.println("总行数："+SumLine);
br.close();
br = null;
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}