4回答

• 

  慕莱坞4226817

  2016-11-10 12:24:25

  已采纳

  import java.text.ParseException;

  import java.text.SimpleDateFormat;

  import java.util.Arrays;

  import java.util.Calendar;

  import java.util.Date;

  import java.util.Scanner;

  
  

  public class Wor3 {

  /*.分析以下需求，并用代码实现：

  (1)通过键盘录入日期字符串，格式(2015-10-20)

  (2)输出该日期是星期几及这一年的第几天

  (3)如输入：2015-10-20，输出"2015年-10月-20日 是 星期二，是  2015年的第 293 天"

  */

  public static void main(String[] args) throws ParseException {

  Scanner sc = new Scanner(System.in);

  System.out.println("请输入日期，如输入：2015-10-20");

  String lineday=sc.nextLine();

  //demo1(lineday);

  //demo2(lineday);

  SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); 

  Date d = sdf.parse(lineday);

  SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy年MM月dd日，是E,是y中的第D天");

  System.out.println(sdf1.format(d));

  }

  
  

  private static void demo2(String lineday) {

  String []sarr=lineday.split("-");

  int []arr=new int[sarr.length];

  for(int i=0;i<sarr.length;i++){

  arr[i]=Integer.valueOf(sarr[i]);

  }

  //System.out.println(Arrays.toString(arr));

  Calendar c =Calendar.getInstance();

  c.set(arr[0],( arr[1]-1), arr[2]);

  System.out.println(c.get(Calendar.YEAR)+"年-"+(c.get(Calendar.MONTH)+1)+"月-"

  +c.get(Calendar.DATE)+"日是"+getWeek(c.get(Calendar.DAY_OF_WEEK))+"是"

  +c.get(Calendar.YEAR)+"年的第"+c.get(Calendar.DAY_OF_YEAR)+"天");

  }

  
  

  private static String getWeek(int week) {

  String arr[]={"","星期日","星期一","星期二","星期三","星期四","星期五","星期六"};

  return arr[week];

  }

  
  

  private static void demo1(String lineday) throws ParseException {

  SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");

  Date d = sdf.parse(lineday);

  System.out.println(d);

  SimpleDateFormat sdf1= new SimpleDateFormat("yyyy年-MM月-dd日 " +

  " 是E,是y年的第D天");

  System.out.println(sdf1.format(d));

  }

  }

  
  

  0 0
• 

  qq_星尘_8

  2016-12-30 16:07:06

  精简版 

  package com.imooc;

  import java.time.*;

  public class CalendarTest 

  {

  public static void main(String[] args)

    {

      LocalDate date=LocalDate.now();

      int month=date.getMonthValue();

      int today=date.getDayOfMonth();

  
  

      date=date.minusDays(today-1);

      DayOfWeek weekday=date.getDayOfWeek();

      int value=weekday.getValue();

  
  

      System.out.println("Mon Tue Wed Thu Fri Sat Sun");

      for(int i = 1; i < value;i++)

        System.out.print("    ");

  while (date.getMonthValue()==month)

  {

   System.out.printf("%3d",date.getDayOfMonth());

   if (date.getDayOfMonth()==today)

       System.out.print("*");

   else

   System.out.print(" ");

   date=date.plusDays(1);

   if (date.getDayOfWeek().getValue()==1)System.out.println();

  }

  if(date.getDayOfWeek().getValue()!=1)System.out.println();

    }

  }

  
  

  0 1
• 

  Flynee

  2016-11-10 12:47:09

  输入密码查看答案

  0 0
• 

  慕莱坞4226817

  2016-11-10 12:23:50

  首先你得能看明白这个
  

  0 1