Java作业05（第7章 常用实用类）_youshini的专栏

package homework05; /* * 题目：编写一个应用程序，输出某年某月的日历页，通过main()方法的参数将年和月份时间传递到程序中。 */ import java.util.Calendar; class CalendarDisplay{ private int year; private int month; public CalendarDisplay(int year,int month){ this.year=year; this.month=month-1; } //返回当前月份的总天数。 public int getNumberOfDaysInMonth(int year,int month){ int num=0; if(month == 1|| month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) num = 31; else if(month == 4 || month == 6 || month == 9|| month == 11) num = 30; else if(month == 2){ if(year%4==0&&year%100!=0||year%400==0) num = 29; else num = 28; } return num; } public void display(){ Calendar cal=Calendar.getInstance(); cal.set(year, month, 1); int weekOf=cal.get(Calendar.DAY_OF_WEEK)-1; month++; String a[]=new String[weekOf+getNumberOfDaysInMonth(year,month)]; for(int i=0;i<weekOf;i++){ a[i]=""; } for(int i=weekOf,n=1;i<weekOf+getNumberOfDaysInMonth(year,month);i++){ a[i]=String.valueOf(n); n++; } System.out.println(" 这是"+year+"年"+month+"月的日历页！"); System.out.printf("%10c%10c%10c%10c%9c%8c%10c\n",'日','一','二','三','四','五','六'); for(int i=0;i<a.length;i++){ if(i%7==0&&i!=0) System.out.println("\n"); System.out.printf("%5s",a[i]); } } } public class ch07_1 { public static void main(String[] args) { new CalendarDisplay(Integer.parseInt(args[0]),Integer.parseInt(args[1])).display(); } } package homework05; /* * 题目：编写一个应用程序，输出某年某月的日历页