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Thread: DATE.java!

  1. #1
    Junior Member
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    Oct 2010
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    Default DATE.java!

    It compiles fine if the user inputs mm/dd/yyyy, but if they input m/d/yyyy it wont work. Any ideas? I am going to upload the directions that I was given. Code is all done just a couple errors : (

    Thanks in advance!
    Joey

    import java.util.Scanner;
     
    public class Activity2 {
      public static void main(String[]args) {
     
    Scanner sc = new Scanner(System.in);
    String date, year;
    int day, month;
    boolean leapYear;
    System.out.println("Please enter a date in the format of mm/dd/yyyy.");
    date = sc.nextLine();
    day= Integer.parseInt(formatDay(date));
    month= flag(formatMonth(date));
    year=formatYear(date);
    leapYear=leapYear(date);
     
     
    switch(month)
    {
          case 1:System.out.println("The date is: January "+day+", "+year); break;
      case 2:if(day<=28){
        System.out.println("The date is: February "+day+", "+year); }
            break;
          case 3:System.out.println("The date is: March "+day+", "+year); break;
          case 4:System.out.println("The date is: April "+day+", "+year); break;
          case 5:System.out.println("The date is: May "+day+", "+year); break;
          case 6:System.out.println("The date is: June "+day+", "+year); break;
          case 7:System.out.println("The date is: July "+day+", "+year); break;
          case 8:System.out.println("The date is: August "+day+", "+year); break;
          case 9:System.out.println("The date is: September "+day+", "+year); break;
          case 10:System.out.println("The date is: October "+day+", "+year); break;
          case 11:System.out.println("The date is: November "+day+", "+year); break;
          case 12:System.out.println("The date is: December "+day+", "+year); break;
          default: System.out.println("What planet are you living on with that kind of date? Try again!");
    }
     
    System.out.println("It is "+leapYear+" that the year "+year+" is a leap year.");
    }
     
     
     
     
    public static String formatDay(String q)
    {
    String day;
    int d;
    day =q.substring(3,5);
    d=Integer.parseInt(day);
    return day;
    }
     
     
     
     
    public static int formatMonth(String q)
    {
    String month = q.substring(0,2);
    int m = flag(Integer.parseInt(month));
    return m;
    }
     
     public static int flag(int month) 
        {
          if(month==1)
            month=1;
             if(month==2)
            month=2;
             if(month==3)
            month=3;
             if(month==4)
            month=4;
            if(month==5)
            month=5;
            if(month==6)
            month=6;
            if(month==7)
            month=7;
            if(month==8)
            month=8;
            if(month==9)
            month=9;
            if(month==10)
            month=10;
            if(month==11)
            month=11;
            if(month==12)
            month=12;
            return month;
      }
     
     
     
     
    public static String formatYear(String q)
    {
    String year;
    year = q.substring(6,10);
    return year;
    }
     
     
     
     
    public static boolean leapYear(String q)
    {
    String year=q.substring(6,10);
    int leap=Integer.parseInt(year);
    {
    if ((leap%4)==0 && (leap%100)!=0)
      return true;
    if ((leap%4)==0&&(leap%100)==0&&(leap%400)==0)
      return true;
    else
      return false;
    }
     
     
     
    }
    }
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  2. #2
    Junior Member
    Join Date
    Apr 2010
    Location
    Italy
    Posts
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    Default Re: DATE.java!

    Hi hiimjoey11,
    if user inserts a date with format m/d/yyyy, method formatDay has an error
    because you retrive day with a substring(3,5).

    If you want that user can insert date with format mm/dd/yyyy or m/d/yyyy, you can modify
    your method formatDate in this mode:

    public static String formatDay(String q){
    String day = "";
    String[] elements = q.split("/");
    if (elements[1].length()==1){
    day = "0" + elements[1];
    }else{
    day = elements[1];
    }

    return day;
    }

    This method splits the date inserted by user and if the string for day has length =1, concats "0" to day string.

    I dont' understand why method formatMonth returns an int, and formaDay returns a String.
    An other thing: Why do you want that your code runs with 2 format of date, but you tell user insert a date with format mm/dd/yyyy?
    Let me know!
    Bye

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