策略模式
abstract class Strategy{ public abstract void AlgorithmInterface();}class StrategyA extends Strategy{ public void AlgorithmInterface() { Sys...
简单工厂模式---四则运算
根据不同的运算符实例化不同的对象class Operation{ protected double numA = 0; protected double numB = 0; public double GetResult() { double result = 0; &...