对象的克隆

package Cloneable;
class Student implements Cloneable
{
	String name;
	int age;
	Father f;
	int[] a = {1,2,3};
	Book[] books;
	Student(String name,int age,Father f,Book[] books)
	{
		this.name = name;
		this.age = age;
		this.f = f;
		this.books = books;
	}
	public String toString()
	{
		String book = "";
		for(Book b:books)
		{
			book+=b;
		}
		return "名字:"+name+" 年龄:"+age+" "+f+" "+book;
	}
	public Student clone() throws CloneNotSupportedException
	{
		Student s = (Student)super.clone();
		s.f = this.f.clone();
		s.a = this.a.clone();
		s.books = this.books.clone();//克隆数组的引用
		for(int i=0;i<books.length;i++)//克隆数组里面具体的内容
		{
			s.books[i] = this.books[i].clone();
		}
		return s;
	}
};
class Father implements Cloneable
{
	int age;
	String name;
	Father(String name,int age)
	{
		this.name = name;
		this.age = age;
	}
	public String toString()
	{
		return "父亲名："+name+" 父亲年龄:"+age;
	}
	public Father clone() throws CloneNotSupportedException
	{
		return (Father)super.clone();
	}
};
class Book implements Cloneable
{
	String name;
	Book(String name)
	{
		this.name = name;
	}
	public String toString()
	{
		return "书名:"+name;
	}
	public Book clone() throws CloneNotSupportedException
	{
		return (Book)super.clone();
	}
};
class CloneTest
{
	public static void main(String[] args) throws CloneNotSupportedException
	{
		Father f = new Father("liyi",45);
		Book[] books = {new Book("java"),new Book("C语言"),new Book("web-1")};
		Student s1 = new Student("lili",25,f,books);
		Student s2 = s1.clone();
		System.out.println(s1);
		System.out.println(s2);
		System.out.println(s1==s2);
		s1.name = "lucy";
		System.out.println(s1);
		System.out.println(s2);
		s1.f.name = "Micro";
		System.out.println(s1);
		System.out.println(s2);
		s1.a[2] = 100;
		System.out.println(s2.a[2]);
		System.out.println(s1.books==s2.books);
		s1.books[0].name = "神雕侠侣";
		System.out.println(s1);
		System.out.println(s2);
	}
};

 

package clone;
class Students2 implements Cloneable//实现Cloneable接口表示可以被克隆
{
	String name;
	int age;
	int []a={1,2,3,4,5};
	Father f=new Father("java",80);
	Students2(String name,int age)
	{
		this.name=name;
		this.age=age;
	}
	public Students2 clone()throws CloneNotSupportedException
	{
		return (Students2) super.clone();//具体的克隆操作由父类来完成
	}
	public String toString()//重写toString()方法
	{
		return "姓名:"+name+"年龄:"+age;
	}
}
class Father implements Cloneable//实现Cloneable接口表示可以被克隆
{
 String name;
 int age;
 Father(String name,int age)
 {
	 this.name=name;
	 this.age=age;
 }
 public Father clone()throws CloneNotSupportedException
	{
		return (Father) super.clone();
	}
 public String toString()
 {
   return "姓名:"+name+"年龄:"+age;
 }
	
}
class StudentTest1 
{
	public static void main(String[] args) throws CloneNotSupportedException 
	{
		Students2 s1=new Students2("lili",25);
		Students2 s2=s1.clone();
		System.out.println("对象的克隆:");
		System.out.println(s1);
		System.out.println(s2);
		int []b=s1.a.clone();
		System.out.println("数组的克隆:");
		System.out.println("原始的数组:");
		for(int i:s1.a)
		{
			System.out.print(i+" ");
		}
		System.out.println("\n克隆后的数组:");
		for(int i:b)
		{
			System.out.print(i+" ");
		}
      System.out.println("\n类的克隆:");
      System.out.println("原始对象:");
      System.out.println(s1.f);
      Father ff=s1.f.clone();
      System.out.println("克隆后的对象:");
      System.out.println(ff);
	  System.out.println("克隆后重新为原对象赋值，看看克隆的对象与被克隆的对象的值是否发生改变:");
	  for(int i=0;i<s1.a.length;i++)
		{
		  s1.a[i]=5-i;
		}
		System.out.println("\n重新为a赋值后，a数组的内容变为:");
		for(int i:s1.a)
		{
			System.out.print(i+" ");
		}
		System.out.println("\n但是b克隆a的内容还是:");
		for(int i:b)
		{
			System.out.print(i+" ");
		}
		System.out.println("\n重新为Fathe f赋值后，f的内容变为:");
		s1.f=new Father("Java SE",100);
		System.out.println(s1.f);
		System.out.println("为F赋值后，但是克隆f的对象ff的内容还是:");
		System.out.println(ff);

	}

}