I try to user filter , but wrong format. Now changed to

        final String mchFn = fn ;
        FilenameFilter filter = new FilenameFilter() {
       public boolean accept(File dir, String name) {
           return name.endsWith(mchFn);
       }
       };

        // Create list of files in this dir
        files = path.listFiles(filter);

But, Just able to list File in current directory. Due to filter just
list of *.java file not include directory.
Next step, try to include directory.

C:\Example\javaux>java Dir ./ java
0 i = 0, 2006-07-07 14:03:05, .\conn2.java
0 i = 1, 2006-07-07 14:39:28, .\conn_rtitem.java
0 i = 2, 2006-07-07 14:03:05, .\conn_unix.java
0 i = 3, 2006-07-07 14:03:06, .\conn_user.java
0 i = 4, 2005-07-29 23:19:54, .\decode_mrp.java
0 i = 5, 2006-08-18 10:31:09, .\Dir.java
0 i = 6, 2006-08-11 12:24:29, .\dir2.java
0 i = 7, 2006-08-17 13:43:17, .\Dir_t.java
0 i = 8, 2003-02-13 00:17:28, .\elapsedTime.java
0 i = 9, 2003-02-04 20:05:32, .\ex_date03.java
0 i = 10, 2003-02-19 21:55:32, .\function.java
0 i = 11, 2004-03-17 16:55:02, .\HELLO.java
0 i = 12, 2003-02-14 12:01:16, .\MaskingThread.java
0 i = 13, 2003-02-14 12:02:54, .\PasswordApp.java
0 i = 14, 2003-02-14 12:02:18, .\PasswordField.java
0 i = 15, 2003-01-14 14:36:44, .\printx.java
0 i = 16, 2003-02-14 11:39:36, .\string_taken.java
0 i = 17, 2005-08-03 21:55:08, .\template.java
0 i = 18, 2005-08-03 22:01:24, .\template2.java
0 i = 19, 2005-08-03 22:19:04, .\test_8bit.java
0 i = 20, 2005-07-31 00:30:10, .\test_cast.java
0 i = 21, 2005-07-29 00:29:40, .\test_double.java
0 i = 22, 2005-07-31 00:38:26, .\test_read.java
0 i = 23, 2005-07-29 10:59:55, .\test_string.java
0 i = 24, 2005-07-31 00:26:26, .\test_while.java
0 i = 25, 2005-07-31 00:27:58, .\testing.java
java

C:\Example\javaux>

/* Application
2006/08/18 eric.leung App filter
2006/08/17 eric.leung
2005/07/21 eric.leung OK

java Dir .\ java

Output
=======
0 i = 100 2006-08-12 00:58:44 .\testing.class
0 i = 101 2005-07-31 00:27:58 .\testing.java
0 i = 102 2005-07-22 08:50:19 .\Thread
    1 i = 0 2005-07-21 22:59:16 .\Thread\MaskingThread.class
    1 i = 1 2003-02-14 12:01:16 .\Thread\MaskingThread.java
    1 i = 2 2003-03-01 23:18:20 .\Thread\ThreadDemo.java
    1 i = 3 2005-10-04 10:48:10 .\Thread\WithThread.java

*/

import java.io.*;
import java.util.*;
import java.text.*;  // For DateFormat

public class Dir {
    static int indentLevel = - 1;
    Dir (String path,String fn) {
        listPath (new File (path), fn);
    }

    void listPath (File path,String fn) {
        File files [];       //List of files in a Directory
        indentLevel++;        // Going Down...

        // http://javaalmanac.com/egs/java.io/GetFiles.html
        // It is also possible to filter the list of returned files.
       // This example does not return any files that start with `.'.

        final String mchFn = fn ;
        FilenameFilter filter = new FilenameFilter() {
       public boolean accept(File dir, String name) {
           return name.endsWith(mchFn);
       }
       };

        // Create list of files in this dir
        files = path.listFiles(filter);

        // Sort with help of Collections API
        Arrays.sort(files);
            for (int i= 0, n=files.length ; i < n ; i++) {
                for (int indent = 0 ; indent < indentLevel; indent++) {

                    System.out.print("     ");
            }
        // DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
        DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date date = new Date(files[i].lastModified());
        //String s = df.getDateInstance(DateFormat.MEDIUM).format(date);
        String s = df.format(date);

            System.out.println(indentLevel + " i = " + i + ", "  + s + ", "  +
files[i].toString());

        if (files[i].isDirectory()) {
            listPath(files[i],fn);
        }
        }
            indentLevel--;         // and going up
    }
        // Main
        public static void main (String args[]) {
            new Dir(args[0],args[1]);
            System.out.println(args[1]);
           
        }       
    }