工场模式(Factory Method)
工厂模式(Factory Method)
工厂设计模式:定义一个用于创建对象的接口,让子类决定实例化那个类,工厂方法使一个类的实例化延迟到其子类
简单案例(加法计算器)
//加减乘除操作工厂
public interface OperationInterface { public double operate(int a,int b); }//创建加减乘除的工厂
public interface FactoryInteface{ public OperationInterface CreateFactory(); }//加法操作类
public class OperationAdd implements OperationInterface { @Override public double operate(int a, int b) { return a+b; } }//创建加法这一操作的工厂
public class FactoryAdd implements FactoryInteface{ @Override public OperationInterface CreateFactory() { return new OperationAdd(); } }//主函数调用
public class Factory { public static void main(String[] arg) { FactoryAdd factoryAdd = new FactoryAdd(); OperationInterface add = factoryAdd.CreateFactory(); System.out.println(add.operate(23, 123)); } }