import java.io.*;
public class Student2 implements Serializable    //序列化
{
    int number=1;
    String name;
    Student2(int number,String n1)
    {
        this.number = number;
        this.name = n1;
    }
    Student2()
    {
        this(0,"");
    }
    void save(String fname)
    {
        try
        {
            FileOutputStream fout = new FileOutputStream(fname);
            ObjectOutputStream out = new ObjectOutputStream(fout);
            out.writeObject(this);               //寫入對象
            out.close();
        }
        catch (FileNotFoundException fe){}
        catch (IOException ioe){}
    }
    void display(String fname)
    {
        try
        {
            FileInputStream fin = new FileInputStream(fname);
            ObjectInputStream in = new ObjectInputStream(fin);
            Student2 u1 = (Student2)in.readObject();  //讀取對象
            System.out.println(u1.getClass().getName()+"  "+
                                 u1.getClass().getInterfaces()[0]);
            System.out.println("  "+u1.number+"  "+u1.name);
            in.close();
        }
        catch (FileNotFoundException fe){}
        catch (IOException ioe){}
        catch (ClassNotFoundException ioe) {}
    }
    public static void main(String arg[])
    {
        String fname = "student2.obj";
        Student2 s1 = new Student2(1,"Wang");
        s1.save(fname);
        s1.display(fname);
    }
}