Creating lstlistings for Java files in multiple Java folders I did write it to have a solution for my problem. But I don't know if my code is ok. Can you please check it?

Problem:

I want to include all my Java files from all my projects (created with Netbeans), the projects are stored in one folder, into a LaTeX document. I solved it with this code:

package dir;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;

public class Dir {

    private static String fileType;
    private static String fileName;
    private static String pathName;
    private static String folderName;
    private static String oldFolderName = "";

    public static void main(String[] args) {
        File currentDir = new File(".");
        content(currentDir);
    }

    public static void content(File dir) {
        try {
            File[] files = dir.listFiles();
            for (File file : files) {
                if (file.isDirectory()) {
                    pathName = file.getName();
                    if (pathName.equals("src")) {
                        pathName = "main";
                    }
                    content(file);
                } else {
                    fileType = Files.probeContentType(Paths.get(file.getAbsolutePath()));

                    if (fileType.equals("text/x-java")) {
                        fileName = file.getName();
                        folderName = file.getParentFile().getName();

                        if(folderName.equals("src")){
                            folderName = file.getParentFile().getParentFile().getName();
                        }else{
                            folderName = file.getParentFile().getParentFile().getParentFile().getName();
                        }

                        if(!folderName.equals(oldFolderName)){
                            System.out.println("\\section{" + folderName + "}");
                        }

                        if(!pathName.equals("")){
                        System.out.println("\\subsection{" + pathName + "}");
                        }


                        System.out.println("\\subsubsection{" + fileName + "}");
                        System.out.println("\\lstinputlisting[language=java]{" + file.getCanonicalPath() + "}");
                        System.out.println("");
                        pathName = "";
                        oldFolderName = folderName;
                    }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}


I am especially frustrated about following part:

if(folderName.equals("src")){
    folderName = file.getParentFile().getParentFile().getName();
}else{
    folderName = file.getParentFile().getParentFile().getParentFile().getName();
}


Is there a better way to loop through all the .getParentFile() until you get the .getParentFile().getName() of the folder named "src"?

Furthermore one question: my code doesn't iterate sorted through my folders and files. I mean, if the subfolder of the folder I am in are like 3, 4, 5 and 6, the code just don't open folder 3 first, but just chooses a random file. It would be nice if you could help me to fix it.
to me it stroke odd that you use old java.io classes to list files, while using the newer (not-so-new-anymore) java 7 java.nio classes to determine file type.
I say you should use Files.isDirectory(Path p) and Files.newDirectoryStream(Path p) to check and list files in directory.

Furthermore, if you want to traverse a directory tree, you have the wonderful Files.walkFileTree() that does all the traversing for you.  You need to implement a FileVisitor that has interception points for start and end of directory and of course for visiting a file.  I believe this can help you in detecting src directories.