自己做的网站怎么加入微信支付/aso优化渠道

一：浅拷贝：
只有子类实现Cloneable接口才可以使用Object使用的clone方法。

protected native Object clone() throws CloneNotSupportedException;

浅拷贝是将原对象的信息拷贝，拷贝后的对象和原对象指向同一块空间。

class Teacher {private String name;private String position;public Teacher(String name, String position) {this.name = name;this.position = position;}@Overridepublic String toString() {return "QianCopy{" +"name='" + name + '\'' +", position='" + position + '\'' +'}';}public void setName(String name) {this.name = name;}
}class Student implements  Cloneable
{private String name;private Integer age;private Teacher teacher;public Student(String name, Integer age, Teacher teacher) {this.name = name;this.age = age;this.teacher = teacher;}@Overrideprotected Student clone() throws CloneNotSupportedException {Student student=null;student=(Student)super.clone();return student;}@Overridepublic String toString() {return "Student{" +"name='" + name + '\'' +", age=" + age +", teacher=" + teacher +'}';}
}public class QianCopy
{public static void main(String[] args) throws CloneNotSupportedException {Teacher teacher=new Teacher("ali","manager");Student student=new Student("sophia",10,teacher);System.out.println("这是原student");System.out.println(student);System.out.println("这是cloneStudent");Student cloneStudent=student.clone();System.out.println(cloneStudent);System.out.println("修改techer姓名");teacher.setName("Jack");//修改teacher的名称，student里的teacher姓名会改变System.out.println("这是修改后原student");System.out.println(student);System.out.println("这是修改后cloneStudent");System.out.println(cloneStudent);}
}

上述clone是浅拷贝，因为拷贝后的teacher和原teacher指向同一块空间，原teacher改变，clone后的student里的teacher也改变。

二：深拷贝
深拷贝指：原对象的修改不会影响拷贝后的对象。
利用序列化，因为序列化后：将二进制字节流内容写到一个媒介（文本或字节数组），然后是从这个媒介读取数据，原对象写入这个媒介后拷贝给clone对象，原对象的修改不会影响clone对象，因为clone对象是从这个媒介读取。

import java.io.*;//深拷贝
class Teacher1 implements Serializable {private String name;private String position;public Teacher1(String name, String position) {this.name = name;this.position = position;}@Overridepublic String toString() {return "QianCopy{" +"name='" + name + '\'' +", position='" + position + '\'' +'}';}public void setName(String name) {this.name = name;}
}class Student1 implements  Cloneable,Serializable
{private String name;private Integer age;private Teacher1 teacher;public Student1(String name, Integer age, Teacher1 teacher) {this.name = name;this.age = age;this.teacher = teacher;}public Student1 cloneSer () throws Exception {Student1 student=null;//在内存中创建一个字节数组缓冲区，所有发送到输出流的数据保存在该字节数组中//默认创建一个大小为32的缓冲区ByteArrayOutputStream byOut=new ByteArrayOutputStream();//对象的序列化输出ObjectOutputStream outputStream=new ObjectOutputStream(byOut);//通过字节数组的方式进行传输outputStream.writeObject(this);  //将当前student对象写入字节数组中//在内存中创建一个字节数组缓冲区，从输入流读取的数据保存在该字节数组缓冲区ByteArrayInputStream byIn=new ByteArrayInputStream(byOut.toByteArray()); //接收字节数组作为参数进行创建ObjectInputStream inputStream=new ObjectInputStream(byIn);student=(Student1)inputStream.readObject(); //从字节数组中读取return student;}@Overridepublic String toString() {return "Student{" +"name='" + name + '\'' +", age=" + age +", teacher=" + teacher +'}';}
}
public class ShenCopy {public static void main(String[] args) throws Exception {Teacher1 teacher=new Teacher1("ali","manager");Student1 student=new Student1("sophia",10,teacher);System.out.println("这是原student");System.out.println(student);System.out.println("这时cloneStudent");Student1 cloneStudent=student.cloneSer();System.out.println(cloneStudent);System.out.println("将teacher姓名进行修改");teacher.setName("Jack");System.out.println("这是修改后原student");System.out.println(student);System.out.println("这是修改后cloneStudent");System.out.println(cloneStudent);}
}