输入年份，月份，打印出该月日历表。
：日历表从2000年起始。
package repeat_job1;
public class Calendar {
public Calendar(){}
private int []a={366,365,365,365};
public int number_Days(int m,int n)
{
int num1=((m-2000)/4)*1461;
int num2=0,sum_days=0;
for(int i=0;i<(m-2000)%4;i++)
{
num2+=a[i];
}
sum_days=num1+num2+number_Day(m,n);
return sum_days;
}
public int leapyear(int m)
{
if((m%4==0&&m%100!=0)||m%400==0)
{
return 29;
}
else
{
return 28;
}
}
public int number_Day(int m,int n)
{
int r=0;
switch(n)
{
case 12:r+=30;
case 11:r+=31;
case 10:r+=30;
case 9:r+=31;
case 8:r+=31;
case 7:r+=30;
case 6:r+=31;
case 5:r+=30;
case 4:r+=31;
case 3:r+=leapyear(m);
case 2:r+=31;
case 1:r+=0;
}
return r;
}
public void print(int m,int n)
{
System.out.println("星期日"+"\t"+"星期一"+"\t"+"星期二"+"\t"+"星期三"+"\t"+"星期四"+"\t"+"星期五"+"\t"+"星期六");
int mod,day;
mod=(1+number_Days(m,n))%7;//为什么加1？
switch(mod)
{
case 2:System.out.print("");break;
case 3:System.out.print("");break;
case 4:System.out.print("\t");break;
case 5:System.out.print("\t\t");break;
case 6:System.out.print("\t\t\t");break;
case 0:System.out.print("\t\t\t\t");break;
case 1:System.out.print("\t\t\t\t\t");break;
}
if(n==1||n==3||n==5||n==7||n==8||n==10||n==12)
{
for(day=1;day<=31;day++)
{
mod=(number_Days(m,n)+day)%7;
switch(mod)
{
case 2:System.out.print(" "+day);break;
case 3:System.out.print("\t"+day);break;
case 4:System.out.print("\t"+day);break;
case 5:System.out.print("\t"+day);break;
case 6:System.out.print("\t"+day);break;
case 0:System.out.print("\t"+day);break;
case 1:System.out.println("\t"+day);break;
}
}
}
else if(n==2)
{
for(day=1;day<=leapyear(m);day++)
{
mod=(number_Days(m,n)+day)%7;
switch(mod)
{
case 2:System.out.print(" "+day);break;
case 3:System.out.print("\t"+day);break;
case 4:System.out.print("\t"+day);break;
case 5:System.out.print("\t"+day);break;
case 6:System.out.print("\t"+day);break;
case 0:System.out.print("\t"+day);break;
case 1:System.out.println("\t"+day);break;
}
}
}
else{
for(day=1;day<=30;day++)
{
mod=(number_Days(m,n)+day)%7;
switch(mod)
{
case 2:System.out.print(" "+day);break;
case 3:System.out.print("\t"+day);break;
case 4:System.out.print("\t"+day);break;
case 5:System.out.print("\t"+day);break;
case 6:System.out.print("\t"+day);break;
case 0:System.out.print("\t"+day);break;
case 1:System.out.println("\t"+day);break;
}
}
}
}
}
import repeat_job1.Calendar; import java.util.Scanner; public class Test2 { public static void main(String[] args) { Calendar ca=new Calendar(); Scanner reader=new Scanner(System.in); System.out.println("请输入年份："); int m=reader.nextInt(); System.out.println("请输入月份："); int n=reader.nextInt(); reader.close(); ca.print(m,n); } }
原文：http://www.cnblogs.com/zyh2017/p/4996038.html