原型模式

原型模式（Prototype），用原型实例指定创建对象的种类，并通过拷贝这些原型创建新的对象。

 图示代码：

public abstract class Prototype {
    private String id;
    
    public Prototype(String id) {
        this.id = id;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }
    
    public abstract Prototype clone();
    
}

public class ConcretePrototype1 extends Prototype {

    public ConcretePrototype1(String id) {
        super(id);
    }

    @Override
    public Prototype clone() {
        Prototype pt= new ConcretePrototype1(this.getId());
        return pt;
    }

}

public class ConcretePrototype2 extends Prototype {

    public ConcretePrototype2(String id) {
        super(id);
    }

    @Override
    public Prototype clone() {
        Prototype pt= new ConcretePrototype2(this.getId());
        return pt;
    }

}

public class TestPrototype {
    public static void main(String[] args) {
        ConcretePrototype1 c1 = new ConcretePrototype1("I");
        ConcretePrototype1 p1 = (ConcretePrototype1) c1.clone();
        System.out.println(p1.getId());
    }
}