Java里浅克隆和深克隆区别

百度了很多，看着特别晕，有人可以详细讲讲么，谢谢
package test;
/*
 * 原型设计模式：浅克隆、深克隆
 * 创建大量同一类对象，使用克隆：克隆比new效率更高
 * Cloneable:空接口，资格的标记
 * clone():属于Object类
 */
class Book implements Cloneable{
    private String name;
    private double price;
   
   
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public Book(String name,double price){
        this.name=name;
        this.price=price;
    }
   
    @Override
    public String toString(){
        return name+":"+price;
    }
   
    @Override
    public Object clone() throws CloneNotSupportedException{
        return super.clone();
        
    }

}

class Student{
    private String name;
    private Book book;
}

public class CloneTest {
    public static void main(String[] args) throws CloneNotSupportedException {
        Book b1 = new Book("luoweideshenlin",26);
        Book b2 = (Book)b1.clone();//不等价：b2=b1;
        b2.setName("pingfandeshijie");
        b2.setPrice(78);
        
        System.out.println(b1.toString());
        System.out.println(b2.toString());
        System.out.println(b1==b2);
    }

}
这个是浅克隆还是深克隆啊，，，，，，，