1.java里的clone分為：
A:淺復制（淺克?。? 淺復制僅僅復制所考慮的對象，而不復制它所引用的對象。
b:深復制（深克?。?span style="COLOR: red">深復制把要復制的對象所引用的對象都復制了一遍。
Java中對象的克隆,為了獲取對象的一份拷貝，我們可以利用Object類的clone()方法。必須要遵循下面三點
1.在派生類中覆蓋基類的clone()方法，并聲明為public【Object類中的clone()方法為protected的】。
2.在派生類的clone()方法中，調(diào)用super.clone()。
3.在派生類中實現(xiàn)Cloneable接口。

Object類里的clone方法是淺復制（淺克隆）

淺復制（淺克?。┑睦尤缦拢?

package com.test;
//淺復制（淺克隆）: 淺復制僅僅復制所考慮的對象，而不復制它所引用的對象。
//深復制（深克?。荷顝椭瓢岩獜椭频膶ο笏玫膶ο蠖紡椭屏艘槐?。
//
//Java中對象的克隆,為了獲取對象的一份拷貝，我們可以利用Object類的clone()方法。必須要遵循下面三點
//1.在派生類中覆蓋基類的clone()方法，并聲明為public【Object類中的clone()方法為protected的】。
//2.在派生類的clone()方法中，調(diào)用super.clone()。
//3.在派生類中實現(xiàn)Cloneable接口。
//Object類里的clone方法是淺復制（淺克隆）public class CloneTest {
public static void main(String[] args) throws Exception{
//teacher對象將被clone出來的Student對象共享.
Teacher teacher = new Teacher();
teacher.setAge(40);
teacher.setName("Teacher zhang");
Student student1 = new Student();
student1.setAge(20);
student1.setName("zhangsan");
student1.setTeacher(teacher);
//復制出來一個對象student2
Student student2 = (Student)student1.clone();
System.out.println(student2.getAge());
System.out.println(student2.getName());
System.out.println("~~~~~~~~~~~~~~~~~~~~~~");
System.out.println(student1.getTeacher().getAge());
System.out.println(student1.getTeacher().getName());
//修改student2的引用對象
student2.getTeacher().setAge(50);
student2.getTeacher().setName("Teacher Li");
System.out.println("~~~~~~~~~~~~~~~~~~~~~~");
System.out.println(student1.getTeacher().getAge());
System.out.println(student1.getTeacher().getName());
}
}
class Teacher {
public int age;
public String name;
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
class Student implements Cloneable{
public int age ;
public String name;
public Teacher teacher;
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Teacher getTeacher() {
return teacher;
}
public void setTeacher(Teacher teacher) {
this.teacher = teacher;
}
@Override
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
}
輸出結(jié)果為：
20
zhangsan
~~~~~~~~~~~~~~~~~~~~~~
40
Teacher zhang
~~~~~~~~~~~~~~~~~~~~~~
50
Teacher Li

2.深復制（深Clone）例子：

package com.test1;
//深clone
public class DeepCloneTest {
public static void main(String[] args) throws Exception{
//teacher對象將不被clone出來的Student對象共享.
Teacher teacher = new Teacher();
teacher.setAge(40);
teacher.setName("Teacher zhang");
Student student1 = new Student();
student1.setAge(20);
student1.setName("zhangsan");
student1.setTeacher(teacher);
//復制出來一個對象student2
Student student2 = (Student)student1.clone();
System.out.println(student2.getAge());
System.out.println(student2.getName());
System.out.println("~~~~~~~~~~~~~~~~~~~~~~");
System.out.println(student1.getTeacher().getAge());
System.out.println(student1.getTeacher().getName());
//修改student2的引用對象
student2.getTeacher().setAge(50);
student2.getTeacher().setName("Teacher Li");
System.out.println("~~~~~~~~~~~~~~~~~~~~~~");
System.out.println(student1.getTeacher().getAge());
System.out.println(student1.getTeacher().getName());
}
}
class Teacher implements Cloneable{
public int age;
public String name;
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
}
class Student implements Cloneable{
public int age ;
public String name;
public Teacher teacher;
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Teacher getTeacher() {
return teacher;
}
public void setTeacher(Teacher teacher) {
this.teacher = teacher;
}
@Override
public Object clone() throws CloneNotSupportedException {
Student student = (Student)super.clone();
//將引用的對象teacher也clone下
student.setTeacher((Teacher)(student.getTeacher().clone()));
return student;
}
}
輸出結(jié)果為：
20
zhangsan
~~~~~~~~~~~~~~~~~~~~~~
40
Teacher zhang
~~~~~~~~~~~~~~~~~~~~~~
40
Teacher zhang

3.利用序列化來做深復制,把對象寫到流里的過程是序列化（Serilization）過程，而把對象從流中讀出來的過程則叫做反序列化（Deserialization）過程。應(yīng)當指出的是，寫在流里的是對象的一個拷貝，而原對象仍然存在于JVM里面。，利用這個特性，可以做深拷貝