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练习.打印月历/年历
/**程序原始功能：打印用户输入月份的月历 * 修改需求： * 1.修改为打印整年的月历（已完成） * 2.修改为打印从输入月份至年底的月历（已完成） * 3.打印从输入月份至下一年（输入月份的上一个月）共12个月的月历（已完成） */
import java.util.Scanner;public class PrintCalendar { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("Enter full year (e.g. 2010): "); int year = input.nextInt(); System.out.print("Enter month in number between 1 and 12: "); int month = input.nextInt(); // Print calendar for the month of the year // 打印输入月份的月历 printMonth(year, month); } // 打印月历（根据输入月份）的方法 /* Print the calendar for a month in a year */ public static void printMonth(int year, int month) { // Print the headings of the calendar printMonthTitle(year, month); // Print the body of the calendar printMonthBody(year, month); } /* Print the month title, e.g. May, 1999 */ public static void printMonthTitle(int year, int month) { System.out.println("\n " + getMonthName(month) + " " + year); System.out.println("-----------------------------"); System.out.println(" Sun Mon Tue Wed Thu Fri Sat"); } /* Get the English name for the month */ public static String getMonthName(int month) { String monthName = " "; switch (month) { case 1: monthName = "January"; break; case 2: monthName = "February"; break; case 3: monthName = "March"; break; case 4: monthName = "April"; break; case 5: monthName = "May"; break; case 6: monthName = "June"; break; case 7: monthName = "July"; break; case 8: monthName = "August"; break; case 9: monthName = "September"; break; case 10: monthName = "October"; break; case 11: monthName = "November"; break; case 12: monthName = "December"; } return monthName; } /* Print month body */ public static void printMonthBody(int year, int month) { // Get start day of the week for the first date in the month // 为了打印日历的主体，需要知道这个月的第一天是星期几 int startDay = getStartDay(year, month); // Get number of days in the month // 以及该月有多少天 int numberOfDaysInMonth = getNumberOfDaysInMonth(year, month); // Pad space before the first day of the month int i = 0; for (i = 0; i < startDay; i++) { System.out.print(" "); } // 打印日期 for (i = 1; i <= numberOfDaysInMonth; i++) { System.out.printf("%4d", i); // 满7天换行 if ((i + startDay) % 7 == 0) { System.out.println(); } } System.out.println(); } /* Get the start day of month/1/year */ public static int getStartDay(int year, int month) { // 1800年1月1日的第一天为星期三 final int START_DAY_FOR_JAN_1_1800 = 3; // Get total number of days from 1/1/1800 to month/1/year int totalNumberOfDays = getTotalNumberOfDays(year, month); // Return the start day for month/1/year return (totalNumberOfDays + START_DAY_FOR_JAN_1_1800) % 7; } /* Get the total number of days since January 1, 1800 */ public static int getTotalNumberOfDays(int year, int month) { int total = 0; // Get the total days from 1800 to 1/1/year for (int i = 1800; i < year; i++) { if (isLeapYear(i)) { total += 366; } else { total += 365; } } // Add days from Jan to the month prior to the calendar month for (int i = 1; i < month; i++) { total += getNumberOfDaysInMonth(year, i); } return total; } /* Get the number of days in a month */ public static int getNumberOfDaysInMonth(int year, int month) { if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) { return 31; } if (month == 4 || month == 6 || month == 9 || month == 11) { return 30; } if (month == 2) { return isLeapYear(year) ? 29 : 28; } // If month is incorrect return 0; } /* Determine if it is a leap year */ public static boolean isLeapYear(int year) { return (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0)); }}
import java.util.Scanner;public class PrintCalendar { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("Enter full year (e.g. 2010): "); int year = input.nextInt(); System.out.print("Enter month in number between 1 and 12: "); int month = input.nextInt(); // 打印从输入月份至年底的月历 printInputMonthToDecember(year, month); } // 打印从输入月份至年底的月历 public static void printInputMonthToDecember(int year, int month) { int temp = month; for (; month <= 12; month++) { printMonth(year, month); if (month == 12) { // 使用break则只打印从输入月份至年底的月历 break; } } } // 打印月历（根据输入月份）的方法 /* Print the calendar for a month in a year */ public static void printMonth(int year, int month) { // Print the headings of the calendar printMonthTitle(year, month); // Print the body of the calendar printMonthBody(year, month); } /* Print the month title, e.g. May, 1999 */ public static void printMonthTitle(int year, int month) { System.out.println("\n " + getMonthName(month) + " " + year); System.out.println("-----------------------------"); System.out.println(" Sun Mon Tue Wed Thu Fri Sat"); } /* Get the English name for the month */ public static String getMonthName(int month) { String monthName = " "; switch (month) { case 1: monthName = "January"; break; case 2: monthName = "February"; break; case 3: monthName = "March"; break; case 4: monthName = "April"; break; case 5: monthName = "May"; break; case 6: monthName = "June"; break; case 7: monthName = "July"; break; case 8: monthName = "August"; break; case 9: monthName = "September"; break; case 10: monthName = "October"; break; case 11: monthName = "November"; break; case 12: monthName = "December"; } return monthName; } /* Print month body */ public static void printMonthBody(int year, int month) { // Get start day of the week for the first date in the month // 为了打印日历的主体，需要知道这个月的第一天是星期几 int startDay = getStartDay(year, month); // Get number of days in the month // 以及该月有多少天 int numberOfDaysInMonth = getNumberOfDaysInMonth(year, month); // Pad space before the first day of the month int i = 0; for (i = 0; i < startDay; i++) { System.out.print(" "); } // 打印日期 for (i = 1; i <= numberOfDaysInMonth; i++) { System.out.printf("%4d", i); // 满7天换行 if ((i + startDay) % 7 == 0) { System.out.println(); } } System.out.println(); } /* Get the start day of month/1/year */ public static int getStartDay(int year, int month) { // 1800年1月1日的第一天为星期三 final int START_DAY_FOR_JAN_1_1800 = 3; // Get total number of days from 1/1/1800 to month/1/year int totalNumberOfDays = getTotalNumberOfDays(year, month); // Return the start day for month/1/year return (totalNumberOfDays + START_DAY_FOR_JAN_1_1800) % 7; } /* Get the total number of days since January 1, 1800 */ public static int getTotalNumberOfDays(int year, int month) { int total = 0; // Get the total days from 1800 to 1/1/year for (int i = 1800; i < year; i++) { if (isLeapYear(i)) { total += 366; } else { total += 365; } } // Add days from Jan to the month prior to the calendar month for (int i = 1; i < month; i++) { total += getNumberOfDaysInMonth(year, i); } return total; } /* Get the number of days in a month */ public static int getNumberOfDaysInMonth(int year, int month) { if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) { return 31; } if (month == 4 || month == 6 || month == 9 || month == 11) { return 30; } if (month == 2) { return isLeapYear(year) ? 29 : 28; } // If month is incorrect return 0; } /* Determine if it is a leap year */ public static boolean isLeapYear(int year) { return (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0)); }}
import java.util.Scanner;public class PrintCalendar { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("Enter full year (e.g. 2010): "); int year = input.nextInt(); System.out.print("Enter month in number between 1 and 12: "); int month = input.nextInt(); // 打印从输入月份至下一年（输入月份的上一个月）共12个月的月历 printInputMonthToNextYear(year, month); } // 打印从输入月份至下一年（输入月份的上一个月）共12个月的月历 public static void printInputMonthToNextYear(int year, int month) { int temp = month; for (; month <= 12; month++) { printMonth(year, month); } for (int i = 1; i <= temp - 1; i++ ) { printMonth(year + 1, i); } } // 打印月历（根据输入月份）的方法 /* Print the calendar for a month in a year */ public static void printMonth(int year, int month) { // Print the headings of the calendar printMonthTitle(year, month); // Print the body of the calendar printMonthBody(year, month); } /* Print the month title, e.g. May, 1999 */ public static void printMonthTitle(int year, int month) { System.out.println("\n " + getMonthName(month) + " " + year); System.out.println("-----------------------------"); System.out.println(" Sun Mon Tue Wed Thu Fri Sat"); } /* Get the English name for the month */ public static String getMonthName(int month) { String monthName = " "; switch (month) { case 1: monthName = "January"; break; case 2: monthName = "February"; break; case 3: monthName = "March"; break; case 4: monthName = "April"; break; case 5: monthName = "May"; break; case 6: monthName = "June"; break; case 7: monthName = "July"; break; case 8: monthName = "August"; break; case 9: monthName = "September"; break; case 10: monthName = "October"; break; case 11: monthName = "November"; break; case 12: monthName = "December"; } return monthName; } /* Print month body */ public static void printMonthBody(int year, int month) { // Get start day of the week for the first date in the month // 为了打印日历的主体，需要知道这个月的第一天是星期几 int startDay = getStartDay(year, month); // Get number of days in the month // 以及该月有多少天 int numberOfDaysInMonth = getNumberOfDaysInMonth(year, month); // Pad space before the first day of the month int i = 0; for (i = 0; i < startDay; i++) { System.out.print(" "); } // 打印日期 for (i = 1; i <= numberOfDaysInMonth; i++) { System.out.printf("%4d", i); // 满7天换行 if ((i + startDay) % 7 == 0) { System.out.println(); } } System.out.println(); } /* Get the start day of month/1/year */ public static int getStartDay(int year, int month) { // 1800年1月1日的第一天为星期三 final int START_DAY_FOR_JAN_1_1800 = 3; // Get total number of days from 1/1/1800 to month/1/year int totalNumberOfDays = getTotalNumberOfDays(year, month); // Return the start day for month/1/year return (totalNumberOfDays + START_DAY_FOR_JAN_1_1800) % 7; } /* Get the total number of days since January 1, 1800 */ public static int getTotalNumberOfDays(int year, int month) { int total = 0; // Get the total days from 1800 to 1/1/year for (int i = 1800; i < year; i++) { if (isLeapYear(i)) { total += 366; } else { total += 365; } } // Add days from Jan to the month prior to the calendar month for (int i = 1; i < month; i++) { total += getNumberOfDaysInMonth(year, i); } return total; } /* Get the number of days in a month */ public static int getNumberOfDaysInMonth(int year, int month) { if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) { return 31; } if (month == 4 || month == 6 || month == 9 || month == 11) { return 30; } if (month == 2) { return isLeapYear(year) ? 29 : 28; } // If month is incorrect return 0; } /* Determine if it is a leap year */ public static boolean isLeapYear(int year) { return (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0)); }}
1 import java.util.Scanner; 2 3 public class PrintCalendar { 4 public static void main(String[] args) { 5 Scanner input = new Scanner(System.in); 6 7 System.out.print("Enter full year (e.g. 2010): "); 8 int year = input.nextInt(); 9 10 // 打印整年的月历 11 printYear(year); 12 13 } 14 15 // 打印整年月历的方法 16 public static void printYear(int year) { 17 for (int i = 1; i <= 12; i++) { 18 printMonth(year, i); 19 } 20 } 21 22 // 打印月历（根据输入月份）的方法 23 /* Print the calendar for a month in a year */ 24 public static void printMonth(int year, int month) { 25 // Print the headings of the calendar 26 printMonthTitle(year, month); 27 28 // Print the body of the calendar 29 printMonthBody(year, month); 30 } 31 32 /* Print the month title, e.g. May, 1999 */ 33 public static void printMonthTitle(int year, int month) { 34 System.out.println("\n " + getMonthName(month) + " " + year); 35 System.out.println("-----------------------------"); 36 System.out.println(" Sun Mon Tue Wed Thu Fri Sat"); 37 } 38 39 /* Get the English name for the month */ 40 public static String getMonthName(int month) { 41 String monthName = " "; 42 switch (month) { 43 case 1: 44 monthName = "January"; 45 break; 46 case 2: 47 monthName = "February"; 48 break; 49 case 3: 50 monthName = "March"; 51 break; 52 case 4: 53 monthName = "April"; 54 break; 55 case 5: 56 monthName = "May"; 57 break; 58 case 6: 59 monthName = "June"; 60 break; 61 case 7: 62 monthName = "July"; 63 break; 64 case 8: 65 monthName = "August"; 66 break; 67 case 9: 68 monthName = "September"; 69 break; 70 case 10: 71 monthName = "October"; 72 break; 73 case 11: 74 monthName = "November"; 75 break; 76 case 12: 77 monthName = "December"; 78 } 79 return monthName; 80 } 81 82 /* Print month body */ 83 public static void printMonthBody(int year, int month) { 84 // Get start day of the week for the first date in the month 85 // 为了打印日历的主体，需要知道这个月的第一天是星期几 86 int startDay = getStartDay(year, month); 87 88 // Get number of days in the month 89 // 以及该月有多少天 90 int numberOfDaysInMonth = getNumberOfDaysInMonth(year, month); 91 92 // Pad space before the first day of the month 93 int i = 0; 94 for (i = 0; i < startDay; i++) { 95 System.out.print(" "); 96 } 97 98 // 打印日期 99 for (i = 1; i <= numberOfDaysInMonth; i++) {100 System.out.printf("%4d", i);101 102 // 满7天换行103 if ((i + startDay) % 7 == 0) {104 System.out.println();105 }106 }107 System.out.println();108 }109 110 /* Get the start day of month/1/year */111 public static int getStartDay(int year, int month) {112 // 1800年1月1日的第一天为星期三113 final int START_DAY_FOR_JAN_1_1800 = 3;114 // Get total number of days from 1/1/1800 to month/1/year115 int totalNumberOfDays = getTotalNumberOfDays(year, month);116 117 // Return the start day for month/1/year118 return (totalNumberOfDays + START_DAY_FOR_JAN_1_1800) % 7;119 }120 121 /* Get the total number of days since January 1, 1800 */122 public static int getTotalNumberOfDays(int year, int month) {123 int total = 0;124 // Get the total days from 1800 to 1/1/year125 for (int i = 1800; i < year; i++) {126 if (isLeapYear(i)) {127 total += 366;128 } else {129 total += 365;130 }131 }132 // Add days from Jan to the month prior to the calendar month133 for (int i = 1; i < month; i++) {134 total += getNumberOfDaysInMonth(year, i);135 }136 return total;137 }138 139 /* Get the number of days in a month */140 public static int getNumberOfDaysInMonth(int year, int month) {141 if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8142 || month == 10 || month == 12) {143 return 31;144 }145 if (month == 4 || month == 6 || month == 9 || month == 11) {146 return 30;147 }148 if (month == 2) {149 return isLeapYear(year) ? 29 : 28;150 }151 // If month is incorrect152 return 0;153 }154 155 /* Determine if it is a leap year */156 public static boolean isLeapYear(int year) {157 return (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0));158 }159 }
练习.打印月历/年历
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