【玩转23种Java设计模式】行为型模式篇：策略模式

public interface Strategy {
    void travelStrategy();
}

public class AirplaneStrategy implements Strategy {
    @Override
    public void travelStrategy() {
        System.out.println("乘坐飞机出游");
    }
}

public class TrainStrategy implements Strategy {
    @Override
    public void travelStrategy() {
        System.out.println("乘坐火车出游");
    }
}

public class Context {
    private Strategy strategy;

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

    public void travel() {
        strategy.travelStrategy();
    }
}

public class Main {
    public static void main(String[] args) {
        Context context = new Context(new AirplaneStrategy());
        context.travel();
    }
}

乘坐飞机出游