如何使用Python计算java源代码的注释行和空行？

Question

我是一名新学员。这是我写的课程。但似乎有很多问题。我想要计算总行数，空行数，注释行数和代码行数。但我不能运行这个程序。我知道我认为评论行的方式是错误的。真的需要一些帮助。

def FileLineCount(filename):
    (shotname,extension) = os.path.splitext(filename);
    if extension == '.java' : # file type 
        file = open(filename,'r');
        allLines = file.readlines();
        file.close();

        lineCount    =0;
        commentCount = 0;
        blankCount   = 0;
        codeCount    = 0;
        for eachLine in allLines:
                if  eachLine.find('//'):  #LINECOMMENT 
                    commentCount += 1;
                else :
                    if eachLine == "":
                        blankCount += 1;
                    else :
                        codeCount += 1;
            lineCount = lineCount + 1;
        self.all += lineCount;
        self.allComment += commentCount;
        self.allBlank += blankCount;
        self.allSource += codeCount;
        print filename;
        print '           Total      :',lineCount ;
        print '           Comment    :',commentCount;
        print '           Blank      :',blankCount;
        print '           Source     :',codeCount;