A very serious student writing code

<无详细内容> Package com.qimenguigu.l07131; Import Java.io.BufferedReader; Import java.io.IOException; Import Java.io.InputStreamReader; /** * Enter the year, month, day, Next|prior, if it is a correct date, calculate the previous day or the next day * * @author Longjie * @website www.qimenguigu.com */ public class Title15 { public static void Main (string[] args) throws IOException { BufferedReader br = new BufferedReader (new InputStreamReader (system.in)); System.out.println ("Please enter the Year"); String S1 = Br.readline (); System.out.println ("Please enter the month"); String s2 = br.readline (); System.out.println ("Please enter a Japanese copy"); String s3 = Br.readline (); int year = Integer.parseint (S1); int month = integer.parseint (S2); int day = Integer.parseint (S3); if (year >= 0 && month >= 1 && month <= 12) { if (month = = 1 | | month = = 3 | | month = = 5 | | month = = 7 || Month = = 8 | | Month = = 10 | | month = = 12) { if (Day >= 1 && Day <= 31) { SYSTEM.OUT.PRINTLN ("You entered the date:" + year + "years" + month + "month") + Day + "Days"); if (day = = 31) { if (month = = 12) System.out.println ("and the previous day is:" + year + "Years December" + (DAY-1) + "Day" + "," + "Next day for:" + (year + 1) + "January 1"); Else System.out.println ("and the previous day is:" + year + "years" + month + "Month" + (DAY-1) + "Day" + "," + "Next day for:" + year + "years" + (month + 1) + "1st"); } else if (day = = 1) { if (month = = 1) System.out.println ("and the previous day is:" + (YEAR-1) + "Year December 31" + "," + "Next day:" + year + "Years" + month + "months" + (day + 1) + "Days"); else if (month = = 3) { If ((year% 4 = = 0 && Year% 100! = 0) || (Year% 400 = = 0)) System.out.println ("And Last day:" + year + "February 29" + "," + "Next day for:" + year + "years" + month + "Month" + (day + 1) + "Days"); Else System.out.println ("And Last day:" + year + "February 28" + "," + "Next day for:" + year + "years" + month + "Month" + (day + 1) + "Days"); } else System.out.println ("and the previous day is:" + year + "Years" + (month-1) + "Month 30th" + "+" Next day for: " + year + "years" + month + "month" + (day + 1) + "Day"); } else System.out.println ("Last day:" + year + "years" + month + "month") + (DAY-1) + "Day" + "+" Next day for: "+ year +" Years " + month + "months" + (day + 1) + "Days"); } else System.out.println ("The date you entered is not valid"); } else if (month = = 4 | | month = = 6 | | month = = 9 | | month = = 11) { if (Day >= 1 && Day <= 30) { SYSTEM.OUT.PRINTLN ("You entered the date:" + year + "years" + month + "month") + Day + "Days"); if (day = = 30) System.out.println ("Last day:" + year + "years" + month + "month") + (DAY-1) + "Day" + "+" Next day for: "+ year +" Years " + (month + 1) + "1st"); else if (day = = 1) System.out.println ("and the previous day is:" + year + "years" + (MONTH-1) + "Month 31st" + "+" Next day for: "+ year +" years "+ month + (day + 1) + "Days"); Else System.out.println ("Last day:" + year + "years" + month + "month") + (DAY-1) + "Day" + "+" Next day for: "+ year +" Years " + Month + (day + 1) + "Days"); } else System.out.println ("The date you entered is not valid"); } else if ((year% 4 = = 0 && Year% 100! = 0) | | (Year% 400 = = 0)) { if (day = = 29) SYSTEM.OUT.PRINTLN ("You entered the date:" + year + "years" + month + "month") + Day + "daily" + "\ n" + "and the previous day is:" + year + "February 28" + "," + "Next day for:" + year + "March 1"); else { if (day = = 28) SYSTEM.OUT.PRINTLN ("You entered the date:" + year + "years" + month + "Month" + Day + "daily" + "\ n" + "and the previous day is:" + year + "February 27" + "," + "Next day for:" + year + "February 29"); Else System.out.println ("The date you entered is not valid"); } } } else System.out.println ("The date you entered is not valid"); } } Copy Code

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