Design pattern prototype - work articles
This year, I have to pay a job, but because I am addicted to the CS these days, I haven't written my homework now. How can I do it? Who knows that our teachers are most hateful for students. Hey, I have a good skill, that is, the Clone Dafa (commonly known as the Copy Dafa), is because of the skill, it can make my cruel struggle in an invincible place. So I took Zhang San 's homework with Thunder and Early Bell, started to work.
Said here, I have to talk about what is CLONE?
There is an object A. Some valid values have been included in a certain time A. You may need one and a completely the same new object B, and after any changes to b will not affect the value in A, that is Say, A and B are two independent objects, but the initial value of B is determined by the object.
I have a good reason to return, let's get started.
1. Here, first define a copy homework interface:
Public interface CopyHomeWork Extends Cloneable {
Public String gethomework ();
Public void setomework (String homework);
}
2, then define a homework implementation class:
Public Abstract Class HomeWork IMPLEments CopyHomework {
String homework;
Public void setomework (String homework) {
this.homework = homework;
}
Public String gethomework () {
Return this.homework;
}
// Typical call clone () code
Public Object Clone () {
Object Object = NULL;
Try {
Object = super.clone ();
}
Catch (ClonyNotsupportedException Exception) {
System.err.Println ("*** is not cloneable");
}
Return Object;
}
Public Abstract void dohomework (); // Doing an abstract class
}
3. Define Zhang San's job (ZHANGSANHOMEWORK) class:
Public class zhangsanhomework eXtends homework {
Public void dohomework () {
System.out.println ("Zhang San finished the job!");
}
}
4, write test classes:
Public class testcopyHomework {
Public static void main (string args []) {
Zhangsanhomework zhangsanhomework = new zhangsanhomework ();
Homework myhomework = (homework) zhangsanhomework.clone ();
MyHomework.doHomework ();
MyHomework.sethomework ("I am copying industry, don't disturb!");
System.out.println (MyHomeWork.getHomeWork ());
}
}
5. Description:
A: Definition: Specify the type of the object with a prototype instance and create a new object by copying these prototypes. B: prototype mode allows an object to create another customable object, do not need to know any details of how to create, the working principle is: passing a prototype object to the object to be created, this to start the object to be created Request prototype objects to copy them themselves to implement creation.
C: prototype mode finally evolved into Clone.
