java 中的序列化概念，卡在了概念中

Question

我不明白序列化的确切概念，请帮助我，也请帮助我理解 d.getCollar().getCollarSize() 的这个概念，这是如何工作的？我们可以直接调用 getColarSize();直接创建那个 class 的对象后的方法？

喜欢，

Collar ab=new Collar(); 
ab.getCollarSize();

代码如下：

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

public class SerializeDog {
    public static void main(String args[])
    {
        Collar c=new Collar(2);
        Dog d=new Dog(c, 5);
        System.out.println("before collar size is :"+d.getCollar().getCollarSize());

        try{
            FileOutputStream fs=new FileOutputStream("serializeDog.ser");
            ObjectOutputStream os=new ObjectOutputStream(fs);
            os.writeObject(d);
            os.close();
        }catch(Exception e){e.printStackTrace();}


        try{
            FileInputStream fis=new FileInputStream("serializeDog.ser");
            ObjectInputStream ois=new ObjectInputStream(fis);
            d=(Dog)ois.readObject();
            ois.close();

        }catch(Exception e){e.printStackTrace();}

        System.out.println("after collar size is: "+d.getCollar().getCollarSize());
    }
}





class Dog implements Serializable{
    private Collar theCollar;
    private int dogSize;
    public Dog(Collar collar,int size)
        {
        theCollar=collar;
        dogSize=size;
        }
    public Collar getCollar()
        {
        return theCollar;
        }
}





class Collar implements Serializable
{
    private int collarSize;
    public Collar(int size)
    {
        collarSize=size;
    }
    public int getCollarSize()
    {
        return collarSize;
    }

}

Answer 1

看看下面的代码

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

public class SerializeDog {
    public static void main(String args[])
    {
        Collar c=new Collar(2);
        Dog d=new Dog(c, 5);
        System.out.println("before collar size is :"+d.getCollar().getCollarSize());

        try{
            FileOutputStream fs=new FileOutputStream("serializeDog.ser");
            ObjectOutputStream os=new ObjectOutputStream(fs);
            os.writeObject(d);
            os.close();
        }catch(Exception e){e.printStackTrace();}


        try{
            FileInputStream fis=new FileInputStream("serializeDog.ser");
            ObjectInputStream ois=new ObjectInputStream(fis);
            d=(Dog)ois.readObject();
            ois.close();

        }catch(Exception e){e.printStackTrace();}

        System.out.println("after collar size is: "+d.getCollar().getCollarSize());
    }
}





class Dog implements Serializable{
    private Collar theCollar;
    private int dogSize;
    public Dog(Collar collar,int size)
        {
        theCollar=collar;
        dogSize=size;
        }
    public Collar getCollar()
        {
        return theCollar;
        }
}

java 中的序列化概念，卡在了概念中

Serialization concept in java, got stuck in concept

java

serialization