package myio; import java.io.FileOutputStream import java.io.IOException; import java.io.ObjectOutputStream; public class Myobject { public static void main(String[] args) { // TODO Auto-generated method stub Book book=new Book("c语言","电子工业",50f ); try { ObjectOutputStream ostream=new ObjectOutputStream(new FileOutputstream("book.txt")); ostream.writeObject(book); ostream.close(); System.out.println("ok"); }catch(IOException e) { e.printStackTrace(); } }把这个代码补充完整 }

这段代码中，Book类的代码没有给出，需要自己定义一个Book类，使得这段代码可以正常运行。补充完整后的代码如下：

package myio;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;

public class Myobject {
    public static void main(String[] args) {
        // TODO Auto-generated method stub 
        Book book = new Book("c语言", "电子工业", 50f);
        try {
            ObjectOutputStream ostream = new ObjectOutputStream(new FileOutputStream("book.txt"));
            ostream.writeObject(book);
            ostream.close();
            System.out.println("ok");
        } catch(IOException e) {
            e.printStackTrace();
        }
    }
}

class Book implements java.io.Serializable {
    private String title;
    private String publisher;
    private float price;

    public Book(String title, String publisher, float price) {
        this.title = title;
        this.publisher = publisher;
        this.price = price;
    }

    public String getTitle() {
        return title;
    }

    public String getPublisher() {
        return publisher;
    }

    public float getPrice() {
        return price;
    }
}

这段代码的作用是将一个Book对象序列化到文件book.txt中。需要注意的是，Book类需要实现Serializable接口才能被序列化。在Book类中定义了三个属性title、publisher、price，以及对应的getter方法。在Myobject类的main方法中，创建了一个Book对象book并将其序列化到文件中。