策略模式Java版

//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();
}

}