Java 深复制,浅复制
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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
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