-4

这次修改代码的目的是统计代码行数的目标是完美的下面是一段代码..

 /**
     * @param args
     * @throws FileNotFoundException
     */
    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);
        }
    }

但问题是，当它在控制台上显示结果时会引发以下异常，请告知如何克服

*****************************************
FILE NAME FOLLOWED BY LOC
*****************************************
C:\Users\vaio\Desktop\Demo\fg\src\asd\abv.java ==> 9
*****************************************
SUM OF FILES SCANNED ==>    1
SUM OF ALL THE LINES ==>    9
Exception while removing reference: java.lang.InterruptedException
java.lang.InterruptedException
    at java.lang.Object.wait(Native Method)
    at java.lang.ref.ReferenceQueue.remove(Unknown Source)
    at java.lang.ref.ReferenceQueue.remove(Unknown Source)
    at sun.java2d.Disposer.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
4

4 回答 4

1

问题是您正在更新块totalLineCount内部catch。把它移到外面。

            } catch (NoSuchElementException e) {
                result.put(file, lineCount); // <-- 
                totalLineCount += lineCount; // <--  
            }

到

              result.put(file, lineCount); 
              totalLineCount += lineCount;   
            } catch (NoSuchElementException e) {
              e.printStackTrace();
            }
于 2012-07-01T05:47:15.980 回答
0

只有在发生 NoSuchElement 异常时才更新 totalLineCount。您应该将其移到 try catch 语句之外或将其放在 finally 块中。

于 2012-07-01T05:47:28.723 回答
0

你有

totalLineCount += lineCount;

在 catch 块中，但在 try 块中，我看不到任何会导致抛出 NoSuchElementException 的东西。将 catch 块代码移至 try 块，该代码似乎不适合作为异常处理程序。至少如果你仍然想在发生异常的情况下执行它，请将它放在 finally 块中。

于 2012-07-01T05:47:36.447 回答
0

我已经修改了您的代码，尝试了解我为使您的代码正常工作所做的工作-

 public class LineCount{ 
private static int totalLineCount = 0;
private static int totalFileScannedCount = 0;

public static void main(final String[] args) throws FileNotFoundException {

    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);
            result  = 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 Map<File, Integer> getFileLineCount(final Map<File, Integer> result, final File file)
        throws FileNotFoundException {


    if (file.isFile()) {
            Scanner scanner = new Scanner(new FileReader(file));
            int lineCount = 0;
           // totalFileScannedCount ++; //saral
            try {
                /*for (lineCount = 0; scanner.nextLine() != null; ) { //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++;
                       }
                }


            } catch (NoSuchElementException e) {


            }
            result.put(file, lineCount);
            totalLineCount += lineCount;
        }
    return result;
    }

//}

/**
 * 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(new FilenameFilter() {

        public boolean accept(final File directory, final String name) {
            if (name.endsWith(".java")) {
                return true;
            } else {
                return false;
            }
        }
    });


    List<File> filesDirs = Arrays.asList(filesAndDirs);

    for (File file : filesDirs) {
        if (file.isFile()) {
            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);
    }
}

}

我把上面的java文件放在一个文件夹里，运行这段代码——结果如下——

文件名后跟 LOC

/home/hkr/Desktop/LineCount.java ==> 129

扫描文件的总和 ==> 1 所有行的总和 ==> 129

于 2012-07-01T06:11:56.177 回答