策略模式

//策略类
public abstract class Strategy {
    public abstract void algorithmInterface();
}


//策略A 和 策略B
public class StrategyA extends Strategy{

    @Override
    public void algorithmInterface() {
        System.out.println("算法A 的思想");
    }
}


// 策略B
public class StrategyB extends Strategy{

    @Override
    public void algorithmInterface() {
        System.out.println("算法B 的思想");
    }
}


// 策略的执行对象
public class Context {

    Strategy strategy;

    public Context(Strategy strategy){
        this.strategy = strategy;
    }

    public void contextInterFace(){
        strategy.algorithmInterface();
    }
}

//客户端
public class Client {


    public static void main(String[] args) {
        Context context;
        context = new Context(new StrategyA());
        context.contextInterFace();
        context = new Context(new StrategyB());
        context.contextInterFace();
    }

}