import java.io.File;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.RandomAccessFile;

/**

*

* @author tracy

*

* The class describes download task meta information.

* See download_task_meta_file.pptx

*/

public class DownloadHelper {

private RandomAccessFile logfile;

// public DownloadHelper(DownloadTask task) {

//

// }

public static void main(String[] args) {

File file = new File("./test");

try {

RandomAccessFile rFile = new RandomAccessFile(file, "rw");

rFile.writeLong(128);

rFile.seek(8);

rFile.writeLong(256);

rFile.seek(16);

rFile.writeLong(512);

rFile.seek(0);

rFile.writeLong(234);

rFile.seek(0);

long readLong = rFile.readLong();

System.out.println(readLong);

rFile.seek(8);

readLong = rFile.readLong();

System.out.println(readLong);

rFile.seek(16);

readLong = rFile.readLong();

System.out.println(readLong);

}

catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

public static long readOffset(int seq) {

// TODO Auto-generated method stub

return 0;

}

public static void writeOffSet(int seq, long count) {

// TODO Auto-generated method stub

}

}