package com.jmj.common;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
/**
* Count the number of lines of code in JAVA projects (including comments, blank lines, and the number of java classes)
*/
public class CountJavaCode {
static long classcount = 0; // 类数
static long normalLines = 0; // 空行
static long commentLines = 0; // comment lines
static long whiteLines = 0; // lines of code
public static void main(String[] args) throws Exception {
File f = new File("D:\\workspace\\dataAudit"); // 目录
CountJavaCode.treeFile(f);
System.out.println("路径：" + f.getPath());
System.out.println("类数：" + classcount);
System.out.println("空行：" + normalLines);
System.out.println("注释：" + commentLines);
System.out.println("代码：" + whiteLines);
}
/**
* Find all .java files in a directory
*
* @throws Exception
*/
public static void treeFile(File f) throws Exception {
File[] childs = f.listFiles();
for (int i = 0; i < childs.length; i++) {
File file = childs[i];
if (!file.isDirectory()) {
if (file.getName().endsWith(".java")) {
classcount++;
BufferedReader br = null;
boolean comment = false;
br = new BufferedReader(new FileReader(file));
String line = "";
while ((line = br.readLine()) != null) {
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++;
}
}
if (br != null) {
br.close();
br = null;
}
}
} else {
treeFile(childs[i]);
}
}
}
}