Java DataOutputStream .writeLong (long v)

public final void writeLong(long v)   throws IOException

/*from w w w  .  j  av  a2 s. com*/
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class Main {
  public static void main(String[] args) throws IOException {

    long[] l = { 1234567890L, 987654321L };
    FileOutputStream fos = new FileOutputStream("c:\\test.txt");
    DataOutputStream dos = new DataOutputStream(fos);
    for (long j : l) {
      dos.writeLong(j);
    }
    dos.flush();
    InputStream is = new FileInputStream("c:\\test.txt");

    DataInputStream dis = new DataInputStream(is);
    while (dis.available() > 0) {
      long k = dis.readLong();
      System.out.print(k);
    }
  }
}