multithreading concept for reading multiple files and storing in another directory

[deepikashashi]

how to read mutliple files from a directory and store it in another dierctory using multi threading cocnept i have just done normal program for that but based on time i want to read files here is my code
import java.io.*;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Date;

public class FileUtils{

public static void main(String args[]) throws Exception {
File files[] = FileUtils.dirListByAscendingDate
(new File("c:/deepika/HAWAI_IND"));
for (File file : files) {
System.out.println(file.getName() + " "
+ new Date(file.lastModified()));
}
System.out.println("*********");
files = FileUtils.dirListByDescendingDate
(new File("C:/deepika/HAWAI_IND"));
for (File file : files) {
System.out.println(file.getName() + " "
+ new Date(file.lastModified()));
}

}

@SuppressWarnings("unchecked")
public static File[] dirListByAscendingDate(File folder) {
if (!folder.isDirectory()) {
return null;
}
File files[] = folder.listFiles();
Arrays.sort( files, new Comparator()
{
public int compare(final Object o1, final Object o2) {
return new Long(((File)o1).lastModified()).compareTo
(new Long(((File) o2).lastModified()));
}
});
return files;
}

@SuppressWarnings("unchecked")
public static File[] dirListByDescendingDate(File folder) {
if (!folder.isDirectory()) {
return null;
}
File files[] = folder.listFiles();
Arrays.sort( files, new Comparator()
{
public int compare(final Object o1, final Object o2) {
return new Long(((File)o2).lastModified()).compareTo
(new Long(((File) o1).lastModified()));
}
});
return files;
}
}