Java I/O - 如何将长整数写入文件

import java.io.DataOutputStream;
import java.io.FileOutputStream;

public class Main {

  public static void main(String[] args) throws Exception {
    FileOutputStream fos = new FileOutputStream("C:/WriteLong.txt");
    DataOutputStream dos = new DataOutputStream(fos);

    long l = 65;
    dos.writeLong(l);
    
    for (int i = 0; i < 10; i++)
      dos.writeInt(i);
      
    dos.close();
  }
}