57 lines
1.1 KiB
Java
57 lines
1.1 KiB
Java
## 6. 原型模式（Prototype）
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### Intent
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使用原型实例指定要创建对象的类型，通过复制这个原型来创建新对象。
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### Class Diagram
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<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/b8922f8c-95e6-4187-be85-572a509afb71.png"/> </div><br>
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### Implementation
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```java
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public abstract class Prototype {
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abstract Prototype myClone();
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}
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```
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```java
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public class ConcretePrototype extends Prototype {
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private String filed;
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public ConcretePrototype(String filed) {
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this.filed = filed;
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}
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@Override
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Prototype myClone() {
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return new ConcretePrototype(filed);
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}
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@Override
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public String toString() {
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return filed;
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}
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}
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```
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```java
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public class Client {
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public static void main(String[] args) {
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Prototype prototype = new ConcretePrototype("abc");
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Prototype clone = prototype.myClone();
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System.out.println(clone.toString());
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}
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}
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```
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```html
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abc
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```
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### JDK
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- [java.lang.Object#clone()](http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#clone%28%29)
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