Statistics Number of lines of code with the code java

public  class Tongjidaima {
     Private  static  int I; // the code number of rows 
    Private  static  int J; // number of files 
    public  static  void main (String [] args) throws IOException { 
        File File = new new File ( "F.: \\ eclipsework \ \ Zhansen "); // take several statistical line folder path 
        traverseFiles (file); // call the recursive method to view .java file for statistics the number of rows 
        System.out.println (" the number of written documents: "+ J); 
        System.out.println ( "total number of lines of code written:" + I); 
    } 
    public  static void traverseFiles (File File) throws IOException {    
         IF (File.Exists ()!) { // file exists 
            return ; 
        } 
        
        IF (! file.isDirectory ()) { // determines whether the file 
            String filename = file.getName ( );
             iF (filename.endsWith ( "the Java.")) { // determine whether the .java file 
                J ++ ; 
                BufferedReader BufferedReader = new new BufferedReader ( new new FileReader (file)); 
                String String = null ;
                 the while((BufferedReader.readLine = String ()) =! null ) { 
                    I ++; // read rows 
                } 
            } the else 
               return ; 
        } 
        
        File [] Files = File.listFiles (); // read subfolders files or subfolders 
        IF (files == null || files.length == 0 ) {
             return ; 
        } 
        
        for (file file2: files) { // If the method is called recursively traverse the file folder 
            traverseFiles (file2); 
        } 
    }     
}