java基础输入年月,打印日历

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代码

//判断闰年平年
    public static Boolean isYear(int x){
        if(x%4==0&&x%100!=0){
            return true;
        }else{
            return false;
        }
    }
//判断月数
    public static int getMonth(int y,int m){
        switch(m){
        case 2:
            if(isYear(y))return 29;
            else return 28;
        case 4:
        case 6:
        case 9:
        case 11:return 30;
        default:return 31;
        }
    }
//从1900到现在的天数,返回是星期几
    public static int getDay(int a,int b){
        int startday = 0,weekday;
        for(int i=1900;i<a;i++){
            if(isYear(i)==true){
                startday += 366;
            }else{
                startday += 365;
            }
        }
        for(int j=1;j<b;j++){
            startday += getMonth(a,j);
        }
        weekday = (startday+1)%7+1;
        if(weekday%7!=0){
            for(int k=0;k<weekday;k++){
                System.out.print("      ");
            }
        }
        for(int i=1;i<=getMonth(a, b);i++){
            System.out.printf("%6d",i);
            if((weekday+i-1)%7==6){
                System.out.println();
            }
        }
        return weekday;

    }
//主函数
public static void main(String[] args) {
        System.out.println("请输入年份");
        Scanner sc = new Scanner(System.in);
        int year = sc.nextInt();
        System.out.println("请输入月份");
        int month = sc.nextInt();
        //初始化天数1900
        System.out.println("----------------------------------------------");
        System.out.println("     星期天      星期一      星期二      星期三      星期四      星期五      星期六            ");
        getDay(year, month);

    }

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转载自blog.csdn.net/DHRMM999/article/details/82386224