相关疑难解决方法(0)

在java序列化类中,Mp3player扩展了ElectronicDevice实现Serializable,在这段代码中,超类electronicdevice未实现可序列化.这里超类也被序列化了.我的理解是超级类也因为extends.let而被序列化.我知道我的理解是否正确.

 import java.io.*;
 class ElectronicDevice { 
      ElectronicDevice() 
      {
           System.out.print("ed "); 
      }
  }
 class Mp3player extends ElectronicDevice implements Serializable {
       Mp3player() 
       { 
          System.out.print("mp "); 
       }
 }
class MiniPlayer extends Mp3player {
     MiniPlayer()
     { 
         System.out.print("mini "); 
     }
     public static void main(String[] args) {
          MiniPlayer m = new MiniPlayer();
          try {
                 FileOutputStream fos = new FileOutputStream("dev.txt");
             ObjectOutputStream os = new ObjectOutputStream(fos);
                 os.writeObject(m); os.close();

                 FileInputStream fis = new FileInputStream("dev.txt");
                 ObjectInputStream is = new ObjectInputStream(fis);
                 MiniPlayer m2 = (MiniPlayer) is.readObject(); 
                 is.close();
                 System.out.println();
          } catch (Exception …

我正在尝试序列化我的位置类(使用android.location类)

但是,它给了我一个错误!

11-21 21:25:37.337: W/System.err(3152): java.io.NotSerializableException: android.location

所以,我试图扩展android.location.Location课程.

private class NewLocation extends Location implements Serializable {
        private String Provider;
        private double Latitude, Longitude, Altitude;

private float bear;
        public NewLocation(Location l) {
            super(l);
            Provider = l.getProvider();
            Latitude = l.getLatitude();
            Longitude = l.getLongitude();
            Altitude = l.getAltitude();
            bear = l.getBearing();
        }
    }

之后,我试图序列化扩展类,但同样的错误.

这是序列化代码

 public static byte[] serialize(Object obj) throws IOException {
        ByteArrayOutputStream bao = new ByteArrayOutputStream();
        ObjectOutput oos = new ObjectOutputStream(bao);
        byte[] data = null;
        oos.writeObject(obj);
        oos.flush();
        oos.close();
        data = …