敲了一下午，代码比较乱，思路也比较乱，第一次敲这么长的java代码，总结起来就是欠练！！
package homework;
import java.io.*;
import java.lang.*;
import java.util.Scanner;
import java.util.*;
class year{
year_month_day m=new year_month_day();
void set(int y){
m.year=y; m.day=1;
}
void year_method(){
int i=1;
for(i=1;i<=12;i++){
System.out.println(+m.year+"年" +i+"月");
m.month=i; m.print();
}
}
}
class year_month_day{
int itag=0;
int year,month,day;
void set(int y,int m,int d) {
year=y; month=m; day=d; }
public int isLeepyear(int year) {
int m;
if((this.year % 4 == 0 && this.year % 100 != 0) || this.year % 400 == 0)
m=1;
else m=0;
return m; }
void print(){
itag=isLeepyear(year);
Calendar rili=Calendar.getInstance();
rili.set(year, month-1, 1);
System.out.println("日 一 二 三 四 五 六");
int week=rili.get(Calendar.DAY_OF_WEEK)-1;
//System.out.println("week="+week);
String a[]=new String[week+31];
for(int i=0;i {
a[i]="**"; }
int num=0;
if(itag==1&&month==2)
num=29;
else if(itag==0&&month==2)
num=28;
else if(month==1||month==3||month==5||month==7||month==8||month==10||month==12)
num=31;
else num=30;
for(int i=week,n=1;i ++)
{
if(n<9) a[i]=String.valueOf(n)+" ";
else a[i]=String.valueOf(n); n++;
}
for(int i=0;i ++)
if(i%7==0){
System.out.println(""); }
if(a[i]==null)
a[i]=" ";
System.out.print(a[i]+" "); }
System.out.print(" "); } }
public class year_calendar {
public static void main(String[] args)
System.out.println("**************************");
System.out.println("* 中华万年历 *");
System.out.println("* 请选择查询方法 *");
System.out.println("*1.按年份检索 2.按年月日检索 *");
System.out.println("*3.退出系统 *");
System.out.println("**************************");
int n; int year,month,day;
Scanner s = new Scanner(System.in);
n=s.nextInt();
switch(n){
case 1: {
System.out.println("请输入要检索的年份:");
year=s.nextInt();
year d=new year();
d.set(year);
d.year_method(); break; }
case 2: {
System.out.println("请输入要检索的年月日:");
year=s.nextInt();
month=s.nextInt();
day=s.nextInt();
year_month_day t=new year_month_day();
t.set(year, month, day);
t.print(); break; }
case 3:break;
}
}
}