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TranficCalculator.java
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TranficCalculator.java
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package design.strategy;
/**
* Author : suzeyu
* Time : 2016-11-20 下午8:46
* Blog : http://szysky.com
* GitHub : https://github.com/suzeyu1992
* ClassDescription : 扮演Context角色的类
*/
public class TranficCalculator {
public static void main (String arg[]){
TranficCalculator calculator = new TranficCalculator();
calculator.setStrategy(new BusStrategy());
// 设置公交车的策略, 并准备计算
System.out.println("公交车-->计算9公里价格: "+calculator.calculatePrice(9));
calculator.setStrategy(new SubwayStrategy());
// 设置地铁的策略, 并准备计算
System.out.println("地铁-->计算9公里价格: "+calculator.calculatePrice(9));
}
/**
* 定义当前策略变量
*/
CalculateStrategy mStrategy;
/**
* 对外设置策略的方法
*/
public void setStrategy(CalculateStrategy strategy){
mStrategy = strategy;
}
/**
* 角色类调用不同策略的计算方法
*/
public int calculatePrice(int km){
return mStrategy.calculatePrice(km);
}
}