/*** 书本:《Thinking In Java》* 功能:对于java字符串格式化说明符* format字符串的格式化参数语法如下：* %[argument_index$][flags][width][.precision]conversion* 文件:Receipt.java* 时间:2015年4月11日19:40:53* 作者:cutter_point*/package Lesson13_strings;import java.util.Formatter;public class Receipt {private double total = 0;private Formatter f = new Formatter(System.out);//指定输出的目的地public void printTitle()//输出标题{//这个格式第一个%-15s 是说宽度为15的字符串，，后面类同，只是-还是不太清楚是个什么f.format("%-15s %5s %10s\n", "Item", "Qty", "Price");f.format("%-15s %5s %10s\n", "—-", "—", "—–");}public void print(String name, int qty, double price){f.format("%-15.15s %5d %10.2f\n", name, qty, price);total += price;}public void printTotal(){f.format("%-15.15s %5s %10.2f\n", "Tax", "", total*0.06);f.format("%-15s %5s %10s\n", "", "", "——");f.format("%-15.15s %5s %10.2f\n", "Total", "", total*1.06);}public static void main(String [] args){Receipt receipt = new Receipt();receipt.printTitle();receipt.print("Jack's Magic Beans", 4, 4.25);receipt.print("Princess Peas", 3, 5.1);receipt.print("Three Bears Porridge", 1, 14.29);receipt.printTotal();Formatter ff = new Formatter(System.out);ff.format("%5d", 998);}}
输出：
Item Qty Price—- — —–Jack’s Magic Be 4 4.25Princess Peas 3 5.10Three Bears Por 1 14.29Tax 1.42 ——Total 25.06 998
美文、不要轻易用过去来衡量生活的幸与不幸！
