java简单日历的制作代码

该日历查询的范围为1900-2015年
import java.util.Scanner;
public class Calendar4 {
public static void main(String[] args){
Scanner input=new Scanner(System.in);
for(;;){
System.out.println("请输入年份");
int year=input.nextInt();
for(;year<1900||year>2050;){
System.out.println("该日历的查询范围在1900年-2050年,请重新输入");
year=input.nextInt();
}
System.out.println("请输入月份");
int month=input.nextInt();
for(;month>13||month<1;){
System.out.println("输入的月份不正确,请重新输入");
month=input.nextInt();
}
int sum=0;
for(int i=1900;i<year;i++){
if(i%4==0&&i%100!=0||i%400==0){
sum+=366;
}else{
sum+=365;
}
for(int j=1;j<month;j++){
if(j==2){
if(year%4==0&&year%100!=0||year%400==0){
sum+=29;
}else{
sum+=28;
}
}else{
if(j==4||j==6||j==9||j==11){
sum+=30;
}else{
sum+=31;
}
}
}
}
sum+=1;
int weekday=sum%7;
System.out.println("日\t一\t二\t三\t四\t五\t六");
for(int i=1;i<=weekday;i++){
System.out.print("\t");
}
if(month==4||month==6||month==9||month==11){
for(int j=1;j<=30;j++){
if(sum%7==6){
System.out.print(j+"\n");
}else{
System.out.print(j+"\t");
}
sum+=1;
}
}else if(month==1||month==3||month==5||month==7||
month==8||month==10||month==12){
for(int j=1;j<=31;j++){
if(sum%7==6){
System.out.print(j+"\n");
}else{
System.out.print(j+"\t");
}
sum+=1;
}
}else if(month==2){
if(year%4==0&&year%100!=0||year%400==0){
for(int j=1;j<=29;j++){
if(sum%7==6){
System.out.print(j+"\n");
}else{
System.out.print(j+"\t");
}
sum+=1;
}
}else{
for(int j=1;j<=28;j++){
if(sum%7==6){
System.out.print(j+"\n");
}else{
System.out.print(j+"\t");
}
sum+=1;
}
}
}
System.out.println("\n还继续吗？（yes/no）");
String question=input.next();
if(question.equals("yes")){
continue;
}else if(question.equals("no")){
break;
}else{
for(;;){
System.out.println("你的回答不正确，请重新输入");
question=input.next();
if(question.equals("yes")){
break;
}else if(question.equals("no")){
break;
}
}
}
if(question.equals("no"))break;
}
}
}