Java 显示星期的一个算法
比如：总天数是num,num不定的，假设num=6，今天是周二，我需要在一向列表上这样显示

周四，周五，周六，周日，昨天，今天

package com.demo;import java.util.Calendar;public class MainDemo {private static final String[] WEEKS = new String[]{"周日","周一","周二","周三","周四","周五","周六"};/** * @param args */public static void main(String[] args) {MainDemo mainDemo = new MainDemo();mainDemo.print(9);}public void print(int num){StringBuffer sb = new StringBuffer();Calendar calendar = Calendar.getInstance();int iCurrentWeek = calendar.get(Calendar.DAY_OF_WEEK);if(num > 0){for(int i = 0;i < num;i++){if(i < num - 2){if(iCurrentWeek - (num - i) >= 0){sb.append(WEEKS[iCurrentWeek - (num - i)] + "\t");}else{sb.append(WEEKS[iCurrentWeek - (num - i) + WEEKS.length] + "\t");}}else{if(i == num - 2){sb.append("昨天\t");}else if(i == num - 1){sb.append("今天\t");}}}}System.out.println(sb.toString().trim());}}