calctaxi.java

这是一个关于jsp的学习文档.为学习jsp的朋友提供方便

import java.util.*;

class Taxi {
	float len;         // 公里
	float start_price;   // 起价
	float start_len = 3;  // 起始里程
	float per_price;   // 每公里价格
	float price;      // 总价
	
	// 设置起价和每公里价格
	public void set_price() {
		int curr_hour = Calendar.getInstance().get(Calendar.HOUR_OF_DAY);
		if(curr_hour >=7 && curr_hour <=23) {
			start_price = 10;	
			per_price = 1.2f;
		}
		else {
			start_price = 11;
			per_price = 1.4f;
		}
	}
	
	public void calc(float len) {
		this.len = len;
		set_price();
		if(len <= start_len) price = start_price;
		else
		    price = start_price + per_price * (len - start_len);
		    
		// 格式化输出结果
		// price = (float) (Math.floor(price * 100) / 100);
		price = Math.round(price);
	}
	
	public void show() {
		System.out.println("起价：" + start_price);
		System.out.println("起始公里：" + start_len);
		System.out.println("每公里价格：" + per_price);
		System.out.println("里程：" + len);
		System.out.println("===========================");
		System.out.println("总价：" + price);
	}
}


public class CalcTaxi{
	public static void main(String[] args) {
	    Taxi ta1 = new Taxi();
	    int  len = 0;
	    try {
	        len = Integer.parseInt(args[0]);
	 	}catch(NumberFormatException ee) {
	 		System.out.println("请输入合法公里数！");	
			return;
	 	}
	    ta1.calc( len ); 
	    ta1.show();
	}
}