java根据日期计算星期几

[maxliu911]

java根据日期计算星期几

[香蕉猪]

给一个定位点,,,然后求之间的差数...
这样的解决方式网络上很多,,,楼主自己Google一下就好啦....

[安特矮油]

Date有个getDay()可以获取，但是这个方法已经不推荐使用了。不过应该还有别的方法可以获取的，你查查api吧

[脉动]

import java.util.*;
class TestDemo
{
	public static void main(String[] args)
	{
		int year = 2012;
		int month = 2;
		int day = 15;
    Calendar calendar = Calendar.getInstance();//获得一个日历
    calendar.set(year, month-1, day);//设置当前时间,月份是从0月开始计算
    int number = calendar.get(Calendar.DAY_OF_WEEK);//星期表示1-7，是从星期日开始，   
    String [] str = {"","星期日","星期一","星期二","星期三","星期四","星期五","星期六",};
    System.out.println(str[number]);
	}	
}

[脉动]

什么情况呢，

[interceptor2012]

有bug

[Quote=引用 3 楼 monghuan 的回复:]
Java code

import java.util.*;
class TestDemo
{
public static void main(String[] args)
{
int year = 2012;
int month = 2;
int day = 15;
Calendar calendar =……
[/Quote]

[hongkiton]

如果只是简单的使用 直接查API就行了 下面是自己写的根据日期求星期几类

//Calculating what date the day the user input, which start with 1st January ,1980(Tuesday).
// 2010-8-28 


import java.util.*;
import java.io.*;
import java.text.*;

public class CalculateWeekDay {
	
	private static BufferedReader  stdIn =
        new BufferedReader(new  InputStreamReader(System.in));
        
  private static PrintWriter  stdOut =
        new PrintWriter(System.out, true);

  private static PrintWriter  stdErr =
        new PrintWriter(System.err, true);

	public static void main(String[] args) throws Exception {
		
		/**Date inputDate = new Date();
		
		SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd");          //格式化日期
		
		System.out.println(f.format(inputDate));
		
		String str = f.format(inputDate);*/
		
		System.out.print("Please input the date: ");
		
		stdErr.flush();
		
		String str = stdIn.readLine();
		
		String str1[] = str.split("-");                              //分隔日期字符串
		
		int year = Integer.parseInt(str1[0]);
		
		int month = Integer.parseInt(str1[1]);
		
		int day = Integer.parseInt(str1[2]);
		
		int total,week,i;
		
		boolean leap = false;
    
    leap = (year%400 ==  0) | (year%100 != 0) & (year%4 == 0);    //判断当年是否是瑞年	
    
    week = 1;               //起始日1979-12-31是monday
    
    total = year - 1980 +(year - 1980 + 3)/4;                //计算total的初值
    
    //计算当年前几月的累计天数与total的初值之和
    
    for(i = 1; i <= month - 1; i++) {
    	
    	switch(i) {
    		
    		case 1:
    		
    		case 3:
    		
    		case 5:
    		
    		case 7:
    		
    		case 8:
    		
    		case 10:
    		
    		case 12:
    		
    		total += 31;
    		
    		break;
    		
    		case 4:
    		
    		case 6:
    		
    		case 9:
    		
    		case 11:
    		
    		total += 30;
    		
    		break;
    		
    		case 2:
    		
    		if(leap)
    				total += 29;
    	  
    	  else
    	  		total += 28;
    	  
    	  break;
    		
    		}
    	
    	} 
    	
    	total = total + day;                 //将本月天数加上
    	
    	week = (week + total)%7;
    	
    	System.out.print("today " + year + "-" + month + "-" +day + " is ");
    	stdErr.flush();
    	
    	switch(week) {
    	
    	case 0:
    	      System.out.println("Sunday");
    	      break;
    	      
      case 1:
            System.out.println("Monday");
    	      break;
    	      
    	case 2:
    	      System.out.println("Tuestay");
    	      break;
    	      
      case 3:
            System.out.println("Wednesday");
    	      break;
    	      
    	case 4:
    	      System.out.println("Thursday");
    	      break;
    	      
    	case 5:
    	      System.out.println("Friday");
    	      break;
    	      
    	case 6:
    	      System.out.println("Saturday");
    	      break;
    	
    	}
     
		}
		
	}

[孤独的狼2021]

import java.util.Calendar;
import java.util.Date;

public class TestWeekDay
{
	public static void main(String[] args) 
	{
		Calendar calendar = Calendar.getInstance();
		
		int year = 201;
		int month = 10;
		int date = 16;
		calendar.set(year,month-1,date);
		int number = calendar.get(Calendar.DAY_OF_WEEK)-1;
		//if(number < 0) number = 0 ;
		String[] str = {"星期日","星期一","星期二","星期三","星期四","星期五","星期六",};
		System.out.println(str[number]);
	} 
}

[lavender975]

public static final String[] weeks = { "星期日","星期一", "星期二", "星期三", "星期四", "星期五", "星期六", };
Calendar c = Calendar.getInstance();
int day=c.get(Calendar.DAY_OF_WEEK)-1;

int[]weekcount=new int[5];
for (int i = 0; i < weekcount.length; i++) {
if (day<=6) {
weekcount[i]=day;
day++;
}else{
day--;
day=6-day;
weekcount[i]=day;
day++;
}
}

[ljfolo59]

貌似是类似万年历的程序

[ilovefzq]

package ason;

import java.util.*;
public class TestDemo
{
public static void main(String[] args)
{

Calendar calendar = Calendar.getInstance();//获得一个日历

calendar.add(calendar.DAY_OF_WEEK, +0);
int number = calendar.get(Calendar.DAY_OF_WEEK);//星期表示1-7，是从星期日开始，
String [] str = {"","星期日","星期一","星期二","星期三","星期四","星期五","星期六",};
System.out.println(str[number]);
}
}
，这个代码还行啊，我测试了一下是好使的啊

[suihongri]

貌似有个基姆拉尔森公式哦！