談談J2SE中的序列化（二）
作者：Favo yang 
favoyang@yahoo.com

當序列化碰到繼續…
當一個父類實現Serializable接口后，他的子類都將自動的實現序列化。

以下驗證了這一點：

package Serial;
import java.io.Serializable;
public class SuperC implements Serializable {//父類實現了序列化 
    int supervalue; 
    public SuperC(int supervalue) { 
       this.supervalue = supervalue; 
    } 
    public String toString() { 
       return "supervalue: "+supervalue; 
    }
}

public class SubC extends SuperC {//子類 
    int subvalue; 

    public SubC(int supervalue,int subvalue) { 
       super(supervalue); 
       this.subvalue=subvalue; 
    } 

    public String toString() { 
       return super.toString()+" sub: "+subvalue; 
    }
}

public class Test1 {

    public static void main(String [] args){ 
       SubC subc=new SubC(100,200); 
       FileInputStream in=null; 
        FileOutputStream out=null; 
        ObjectInputStream oin=null; 
        ObjectOutputStream oout=null; 
        try { 
            out = new FileOutputStream("Test1.txt");//子類序列化 
            oout = new ObjectOutputStream(out); 
            oout.writeObject(subc); 
            oout.close(); 
            oout=null;

            in = new FileInputStream("Test1.txt"); 
            oin = new ObjectInputStream(in); 
            SubC subc2=(SubC)oin.readObject();//子類反序列化 
            System.out.PRintln(subc2); 
        } catch (Exception ex){ 
            ex.printStackTrace(); 
        } finally{ 
            …此處省略 
        } 
    }
}