Java code statistics Tool

Java was originally designed to collect statistics on the number of Java code lines written in its own code lines. The function is very simple. It provides a file path and counts the total number of lines of code, comment lines, empty lines, and so on.

Implementation: Typical recursion is used to traverse all java files: Determine whether the file is a directory or a file. If it is a directory, it traverses all the sub-files of the file, call this method recursively for all sub-files. For java files, count the number of rows directly and use a regular expression to count the number of rows. The core code is as follows:

Traverse all java files:

 

Public void getfilename (string filepath)

{

File F = new file (filepath );

If (! F. isdirectory () // not a directory

{

If (F. getname (). endswith (". Java "))

{

Count (f );

}

}

Else // is the Directory

{

String [] filelist = f. List ();

For (INT I = 0; I <filelist. length; I ++)

{

File file = new file (filepath + "//" + filelist [I]);

If (! File. isdirectory () // not a directory

{

If (file. getname (). endswith (". Java "))

{

Count (File );

}

}

Else // is the Directory

{

Getfilename (file. getpath (); // Note: it is not getname ()!

}

}

}

}

Count the number of lines of code:

While (line = Br. Readline ())! = NULL)

{

Line = line. Trim ();

If (line. Matches ("^ [[/S] & [^/n] * $") // spaceline? * $

{

Spaceline ++;

}

Else if (line. startswith ("//") | (line. startswith ("/*") & line. endswith ("*/")))

{

Commentline ++;

}

Else if (line. startswith ("/*")&&! Line. endswith ("*/"))

{

Commentline ++;

Comment = true;

}

Else if (line. endswith ("*/") & comment = true)

{

Commentline ++;

Comment = false;

}

Else if (comment = true)

{

Commentline ++;

}

Else

{

Normalline ++;

}

}

Complete code and runnable jar files are available inHttp://download.csdn.net/user/china8848.