Java 示例 - 显示一年中的周数

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  问题描述

  如何找到一年中的哪一周，哪一个月？
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  解决方案

  以下示例显示年和月的第几周。

  
  import java.util.*;
  public class Main {
     public static void main(String[] args) throws Exception {
        Date d1 = new Date();
        Calendar cl = Calendar. getInstance();
        cl.setTime(d1);
        
        System.out.println("today is " + cl.WEEK_OF_YEAR+ "week of the year");
        System.out.println("today is a "+cl.DAY_OF_MONTH + "month of the year");
        System.out.println("today is a "+cl.WEEK_OF_MONTH +"week of the month");
     }
  }
  

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  结果

  上面的代码示例将产生以下结果。

  
  today is 30 week of the year
  today is a 5month of the year
  today is a 4week of the month
  

  以下是一年中的一周、一个月的另一个示例。

  
  import java.util.Calendar;
   
  public class GetWeekOfMonthAndYear {
     public static void main(String[] args) {
        Calendar cal = Calendar.getInstance();
        System.out.println("Current week of month is : " +cal.get(Calendar.WEEK_OF_MONTH));
        System.out.println("Current week of year is : " +cal.get(Calendar.WEEK_OF_YEAR));
        cal.add(Calendar.WEEK_OF_MONTH, 1);
        System.out.println(
           "date after one year : " + (cal.get(Calendar.MONTH) + 1)+ "-"+ cal.get(Calendar.DATE)+ "-"+ cal.get(Calendar.YEAR)); 
     }
  }
  

  上面的代码示例将产生以下结果。

  
  Current week of month is : 2
  Current week of year is : 46
  date after one year : 11-18-2016