CountFile1

import java.io.File;

import wan.dev.sample.countfile.CountFileExtension1.GenericExtFilter;

public class CountFile1 {
    private static final String FILE_DIR = "D:\\";
    private static final String FILE_TEXT_EXT = ".txt";
    private static final String FILE_PPT_EXT = ".pptx";
    private static final String FILE_JPG_EXT = ".jpg";
    private static final String FILE_FLV_EXT = ".flv";
    private static final String FILE_MP3_EXT = ".mp3";
    private static final String FILE_DOCX_EXT = ".docx";
    private static final String FILE_SPREADSHEET_EXT = ".xlsx";
    private static final String FILE_SYSTEM_EXT = ".dll";
    private static final String FILE_OTHER_EXT = ".";

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

//      scan and count file
        int totalCountTxt = 0;
        int totalCountPptx = 0;
        int totalCountFlv = 0;
        int totalCountMp3 = 0;
        int totalCountDocx = 0;
        int totalImageCount = 0;
        int totalCountSystem = 0;
        int totalOtherCount = 0;

        File file = new File(FILE_DIR);
        calculateFile countTxt    = new calculateFile( file, "Text", FILE_TEXT_EXT, ".dll", ".exe" );
        calculateFile countPptx   = new calculateFile( file, "Power Point", FILE_PPT_EXT );
        calculateFile countJpg    = new calculateFile( file, "Image", FILE_JPG_EXT );
        calculateFile countFlv    = new calculateFile( file, "Video", FILE_FLV_EXT );
        calculateFile countMp3    = new calculateFile( file, "Music", FILE_MP3_EXT );
        calculateFile countDocx   = new calculateFile( file, "Document", FILE_DOCX_EXT );
        calculateFile countSystem = new calculateFile( file, "System", FILE_SYSTEM_EXT );

        countTxt.run();
        countPptx.run();
        countJpg.run();
        countFlv.run();
        countMp3.run();
        countDocx.run();
        countSystem.run();

//      totalCountTxt = countTxt.getCount();
//      totalCountPptx = countPptx.getCount();
//      totalImageCount = countJpg.getCount();
//      totalCountFlv = countFlv.getCount();
//      totalCountMp3 = countMp3.getCount();
//      totalCountDocx = countDocx.getCount();
//      totalCountSystem = countSystem.getCount();
//
    }
}

//other clas
class calculateFile implements Runnable {
    int count = 0;
    File file = null;
    String[] exts = null;
    String title = null;

    public calculateFile(File file, String title, String... exts) throws InterruptedException {
        this.exts = exts;
        this.file = file;
        this.title = title;

        }

    public int countFiles(File directory, String... exts) {
        this.exts = exts;
        CountFileExtension1 mainclass = new CountFileExtension1();
        int count = 0;
        for(File file : directory.listFiles()) {
            if(file.isDirectory()) {
                count += countFiles(file, exts);
            }
        String textFile = file.toString();
        for (String ext : exts) {
             if (textFile.endsWith(ext)) {
                count++;
             }
        }
        }
        return count;
    }

    public int getCount(){
        int count = this.count;
        return count;
    }

    public void run() {
        count += countFiles(file, exts);
        System.out.println("from " + title);
        System.out.println(count);
    }
}
//  http://stackoverflow.com/questions/12616124/get-number-of-files-in-a-directory-and-its-subdirectories