我正在尝试开发计算我的源文件代码行的应用程序..
package asd;
public class abv {
/**
* @param args
*/
public static void main(String[] args) {
// comment
/* comment*/
}
}
以下是代码.....
private static int totalLineCount = 0;
private static int totalFileScannedCount = 0;
public static void main(final String[] args) throws Exception {
JFileChooser chooser = new JFileChooser();
chooser.setCurrentDirectory(new java.io.File("C:" + File.separator));
chooser.setDialogTitle("FILES ALONG WITH LINE NUMBERS");
chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
chooser.setAcceptAllFileFilterUsed(false);
if (chooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
Map<File, Integer> result = new HashMap<File, Integer>();
File directory = new File(chooser.getSelectedFile().getAbsolutePath());
List<File> files = getFileListing(directory);
// print out all file names, in the the order of File.compareTo()
for (File file : files) {
// System.out.println("Directory: " + file);
getFileLineCount(result, file);
//totalFileScannedCount += result.size(); //saral
}
System.out.println("*****************************************");
System.out.println("FILE NAME FOLLOWED BY LOC");
System.out.println("*****************************************");
for (Map.Entry<File, Integer> entry : result.entrySet()) {
System.out.println(entry.getKey().getAbsolutePath() + " ==> " + entry.getValue());
}
System.out.println("*****************************************");
System.out.println("SUM OF FILES SCANNED ==>" + "\t" + totalFileScannedCount);
System.out.println("SUM OF ALL THE LINES ==>" + "\t" + totalLineCount);
}
}
public static void getFileLineCount(final Map<File, Integer> result, final File directory)
throws FileNotFoundException {
File[] files = directory.listFiles(new FilenameFilter() {
public boolean accept(final File directory, final String name) {
if (name.endsWith(".java")) {
return true;
} else {
return false;
}
}
});
for (File file : files) {
if (file.isFile()) {
Scanner scanner = new Scanner(new FileReader(file));
int lineCount = 0;
totalFileScannedCount ++; //saral
try {
/*for (lineCount = 0; scanner.nextLine() != null;lineCount++ ) { //saral
;
}*/
while (scanner.hasNextLine()) {
String line = scanner.nextLine().trim();
if (!line.isEmpty()) {
System.out.println("debug-->"+line); // to debug cross checked that no whitespaces are there
lineCount++;
}
}
result.put(file, lineCount);
totalLineCount += lineCount;
} catch (NoSuchElementException e) {
// e.printStackTrace();
}
}
}
}
/**
* Recursively walk a directory tree and return a List of all Files found;
* the List is sorted using File.compareTo().
*
* @param aStartingDir
* is a valid directory, which can be read.
*/
static public List<File> getFileListing(final File aStartingDir) throws FileNotFoundException {
validateDirectory(aStartingDir);
List<File> result = getFileListingNoSort(aStartingDir);
Collections.sort(result);
return result;
}
// PRIVATE //
static private List<File> getFileListingNoSort(final File aStartingDir) throws FileNotFoundException {
List<File> result = new ArrayList<File>();
File[] filesAndDirs = aStartingDir.listFiles();
List<File> filesDirs = Arrays.asList(filesAndDirs);
for (File file : filesDirs) {
if (file.isDirectory()) {
result.add(file);
}
if (!file.isFile()) {
// must be a directory
// recursive call!
List<File> deeperList = getFileListingNoSort(file);
result.addAll(deeperList);
}
}
return result;
}
/**
* Directory is valid if it exists, does not represent a file, and can be
* read.
*/
static private void validateDirectory(final File aDirectory) throws FileNotFoundException {
if (aDirectory == null) {
throw new IllegalArgumentException("Directory should not be null.");
}
if (!aDirectory.exists()) {
throw new FileNotFoundException("Directory does not exist: " + aDirectory);
}
if (!aDirectory.isDirectory()) {
throw new IllegalArgumentException("Is not a directory: " + aDirectory);
}
if (!aDirectory.canRead()) {
throw new IllegalArgumentException("Directory cannot be read: " + aDirectory);
}
}
现在出现的问题是。当我选择项目文件夹并在控制台上查看结果时，它会计算我的java文件的代码行，但它也会对注释进行计数，我甚至不希望评论得到计数，这意味着评论的行不会被计算作为代码行，请告知需要在代码片段中进行哪些修改...
下面的输出是我在控制台上的输出..debug-->package asd;
debug-->public class abv {
debug-->/**
debug-->* @param args
debug-->*/
debug-->public static void main(String[] args) {
debug-->// comment
debug-->/* comment*/
debug-->}
debug-->}
*****************************************
FILE NAME FOLLOWED BY LOC
*****************************************
C:\Users\vaio\Desktop\Demo\fg\src\asd\abv.java ==> 10
*****************************************
SUM OF FILES SCANNED ==> 1
SUM OF ALL THE LINES ==> 10
请告知在代码中需要进行哪些修改...
答案 0 :(得分：1)
我对此的第一次尝试是使用正则表达式。鉴于源文件不会那么大，您可以将整个行读取到一个字符串中，运行一个正则表达式，用任何内容替换所有注释，然后计算新字符串中的行。
我的Java有点生疏，但我相信这会有效（没有现在可以测试的环境）：
int count = 0;
Scanner scanner = new Scanner(new File(file));
scanner.useDelimiter("\\Z");
String data = scanner.next();
String cleaned = data.replaceAll("/\\*(?:.|[\\n\\r])*?\\*/",""));
LineNumberReader lnr = new LineNumberReader(new StringReader(cleaned));
String line;
while ((line = lnr.readLine()) != null)
{
String sline = line.trim();
if(sline.isEmpty() == false)
if(!(sline.length() > 2 && sline.charAt(0) == '/' && sline.charAt(1) == '/'))
count += 1;
//separated for clarity
}
这应该为您提供不是所有注释的行数//并且还处理多行注释。
来自正则表达式的评论来源：Regex source
答案 1 :(得分：0)
我以前的回答不正确。因为你把它标记为正确所以我使用了代码 @Trickfire编辑我的答案。
while (scanner.hasNextLine()) {
scanner.useDelimiter("\\Z");
String data = scanner.next();
String cleaned = data.replaceAll("/\\*(?:.|[\\n\\r])*?\\*/",""));
LineNumberReader lnr = new LineNumberReader(new StringReader(cleaned));
String line;
while ((line = lnr.readLine()) != null)
{
String sline = line.trim();
if(sline.isEmpty() == false)
if(!(sline.length() > 2 && sline.charAt(0) == '/' && sline.charAt(1) == '/'))
lineCount += 1;
//separated for clarity
}
}