Java 深复制，浅复制

系统管理员 2022-08-06 11:11 202阅读 0赞

浅复制代码实例:

public class CloneTest1  
\{  
public static void main(String\[\] args) throws CloneNotSupportedException  
\{  
Student student  = new Student();  
  
student.setAge(20);  
student.setName("zhangsan");  
  
Student student2 = (Student)student.clone();  
  
System.out.println(student2.getAge());  
System.out.println(student2.getName());  
System.out.println("---------------");  
  
student2.setName("lisi");  
  
System.out.println(student.getName());  
System.out.println(student2.getName());  
\}  
\}  
  
  
class Student implements  Cloneable   
\{  
private int age;  
  
private 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  
\{  
Object object = super.clone();  //浅复制  
  
return object ;  
\}  
\}

深复制的小实例

public class CloneTest2  
\{  
public static void main(String\[\] args) throws CloneNotSupportedException  
\{  
Teacher teacher = new Teacher();  
  
teacher.setAge(40);  
teacher.setName("teacher zhang");  
  
Student2 s1 = new Student2();  
  
s1.setAge(20);  
s1.setName("zhangsan");  
s1.setTeacher(teacher);  
  
Student2 s2 = (Student2)s1.clone();  
  
System.out.println(s2.getName());  
System.out.println(s2.getAge());  
  
teacher.setName("teacher li");  
  
System.out.println(s2.getTeacher().getName());  
System.out.println(s2.getTeacher().getAge());  
  
\}  
\}  
  
  
class Teacher implements Cloneable  
\{  
private int age;  
  
private 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  
\{  
Object object = super.clone();  
  
return (Teacher)object;  
\}  
  
  
\}  
  
  
  
  
class Student2 implements Cloneable  
\{  
private int age;  
  
private String name;  
  
private 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  
\{  
Student2 student2 = (Student2)super.clone();  
  
student2.setTeacher((Teacher)student2.getTeacher().clone());  
  
  
return student2;  
\}  
  
  
\}

使用序列化的方式也可以实现对象的深复制