设计模式 - 策略模式

public class Context {
    
    Strategy strategy;
    
    public Context(Strategy strategy) {
        this.strategy = strategy;
    }
    
    //上下文接口
    public void contextInterface() {
        strategy.algorithmInterface();
    }

}

public abstract class Strategy {     
     //算法方法
     public abstract void algorithmInterface();
 
 }

public class ConcreteStrategyA extends Strategy {

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

}

public class Client {
    
    public static void main(String[] args) {
        Context context;
        
        context = new Context(new ConcreteStrategyA());
        context.contextInterface();
        
        context = new Context(new ConcreteStrategyB());
        context.contextInterface();
        
        context = new Context(new ConcreteStrategyC());
        context.contextInterface();
    }

}