java月历_用Java实现月历输出

import java.util.*;

public class Calendar_Month {

int week; //存储某月的第一天是周几

int []dayofP = {31,28,31,30,31,30,31,31,30,31,30,31}; //平年每月多少天

int []dayofR = {31,29,31,30,31,30,31,31,30,31,30,31}; //闰年每月多少天

int dayofM; //所要求月份的最大天数

int year,month; //用于存储年和月的数值

GregorianCalendar objC; //创建一个日历的实例

/**无参数的构造方法，获得当前时间*/

public Calendar_Month(){

objC = new GregorianCalendar();

}

//设置该月的第一天是周几,以及设置该月的最大天数

void setDay(int[] a){

//设置该月的第一天是周几

if (a.length == 0){

objC.set(Calendar.DAY_OF_MONTH,1);

week = objC.get(Calendar.DAY_OF_WEEK);

month = objC.get(Calendar.MONTH);

year = objC.get(Calendar.YEAR);

}

else{

month = a[1];

year = a[0];

objC.set(year,month-1,1);

week = objC.get(Calendar.DAY_OF_WEEK);

}

//设置该月的最大天数

if(objC.isLeapYear(year)){

dayofM = dayofR[month - 1];

}

else{

dayofM = dayofP[month - 1];

}

}

/**此方法用于显示日历*/

void display(){

System.out.println("\t\t\t " + year + " 年 " + toDaXie(month) + " 月");

System.out.println("\t日\t一\t二\t三\t四\t五\t六");

int len = week-1;

for(int i = 0; i < week-1; i++){

System.out.print("\t ");

}

for (int i = 1; i <= dayofM; i++) {

System.out.print("\t"+i);

len++;

if(len == 7){

System.out.println();

len=0;

}

}

}

public String toDaXie(int n){

switch (n) {

case 1:

return "一";

case 2:

return "二";

case 3:

return "三";

case 4:

return "四";

case 5:

return "五";

case 6:

return "六";

case 7:

return "七";

case 8:

return "八";

case 9:

return "九";

case 10:

return "十";

case 11:

return "十一";

case 12:

return "十二";

default:

return " ";

}

}

public static void main(String[] args) {

Calendar_Month objCa = new Calendar_Month();

Scanner scanner = new Scanner(System.in);

int[] a = new int[2];

a[0] = scanner.nextInt();

a[1] = scanner.nextInt();

objCa.setDay(a);

objCa.display();

}

}

输出结果为：

2010 5

2010 年 五 月

日一二三四五六

1

2345678

9101112131415

16171819202122

23242526272829

3031

附从网上找的一个程序：StdOut.print和System.out.println()一样功能，可代替

public class Main {

public static int getWeek(int yr, int mo, int day) {

int a = (14 - mo) / 12, y = yr - a, m = mo + (12 * a) - 2;

return (day + y + y / 4 - y / 100 + y / 400 + (31 * m) / 12) % 7;

}

public static int getMonth(int y, int m) {

if (m == 1 || m == 3 || m == 5 || m == 7 || m == 8

|| m == 10 || m == 12)

return 31;

if (m == 4 || m == 6 || m == 9 || m == 11)

return 30;

if (y % 4 == 0 && y % 100 != 0 || y % 400 == 0)

return 29;

else

return 28;

}

public static void menology() {

int year = StdIn.readInt(), month = StdIn.readInt();

String[] showMonth = { "一", "二", "三", "四", "五", "六", "七", "八", "九",

"十", "十一", "十二" };

StdOut.println(" " + year + "年" + showMonth[month - 1] + "月");

StdOut.print("日" + " " + "一" + " " + "二" + " " + "三" + " " + "四" + " "

+ "五" + " " + "六");

System.out.println();

int m = getMonth(year, month);

for (int i = 0; i < m; i++) {

int w = getWeek(year, month, (i + 1));

if (i == 0) {

for (int j = w; j > 0; j--)

StdOut.print(" ");

}

if (i < 9)

StdOut.print(" " + (i + 1) + " ");

else

StdOut.print((i + 1) + " ");

if ((w == 6) || ((i + 1) == m))

StdOut.println();

}

}

public static void main(String[] args) {

menology();

}}

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2010-05-05 11:15

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评论

1 楼

walc

2012-03-30

不错。可以学习一下。