Java 编写万年历

万年历

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Scanner;

public static void main(String args[]) throws Exception { 
	Scanner sc = new Scanner(System.in);
	System.out.println("请输入年份");
	int year = sc.nextInt();
	System.out.println("请输入月份");
	int month = sc.nextInt();
	System.out.println("\t\t\t" + year +"年" + month + "月");
	System.out.println("***********************************************");
	for (int i = 0; i < 7; i++) { 
		if (i == 0) { 
			System.out.print("星期日\t");
		 } else { 
		 	System.out.print("星期" + i + "\t");
		 	}
	}
	// 换行
	System.out.println();
	String time = year + "/" month;
	SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-M");
	Date date = dateFormat.parse(time);
	Calendar calendar = Calendar.getInstance();
	calendar.setTime(date);
	// 获取输入年份月份是星期几
	int day = calendar.get(Calendar.DAY_OF_WEEK);
	// 获取输入月份的天数
	int  month_of_day = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
	for(int i=0; i<42; i++) { 
		// 从哪里开始打印
		if(i < (day-1) ) { 
			System.out.print("\t");
		} else { 
			System.out.print( (i-day+2)+"\t");
			if(i == (day + month_of_day - 2 )) { 
				break;
			}
		}
		if((i+1) % 7 == 0) { 
			System.out.println();
		}
	}
}