EffectiveJava中关于枚举的漂亮代码

最新推荐文章于 2024-11-12 10:04:59 发布

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本文展示了一个使用Java枚举实现薪资计算的例子。通过定义工作日类型及其加班费计算方式，实现了不同工作日薪资的不同计算逻辑。代码示例中包含了工作日枚举类的定义、加班费计算方法及主函数调用。

enum PayrollDay{
MONDAY(PayType.WEEKDAY),TUESDAY(PayType.WEEKDAY),
WEDNESDAY(PayType.WEEKDAY),THURSDAY(PayType.WEEKDAY),
FRIDAY(PayType.WEEKDAY),
SATURDAY(PayType.WEEKEND),SUNDAY(PayType.WEEKEND);
private final PayType payType;
PayrollDay(PayType payType){
	this.payType=payType;
}
double pay(double hours,double payRate){
	return payType.pay(hours,payRate);
}
	private enum PayType{
		WEEKDAY{
		double overtimePay(double hours,double payRate){
			return hours<HOUR_PER_SHIFT?0:(hours-HOUR_PER_SHIFT)*payRate/2;
			}
		},
		WEEKEND{
		double overtimePay(double hours,double payRate){
			return hours* payRate/2;
			}
		};
		abstract double overtimePay(double hours,double payRate);
		private static final int HOUR_PER_SHIFT=8;
		double pay(double hours,double payRate){
			double basePay=hours*payRate;
			return basePay+overtimePay(hours,payRate);
		}
	}

public static void main(String args[]){
	for(PayrollDay pa:values()){
	System.out.println(pa.pay(9,100));
	}
}

}