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Java Data Type Q&A » Date Time » date 4 




1. Date arithmetic...I'm just a bit stumped.    coderanch.com

I'm trying to write a report utility for PVCS Tracker. Tracker uses an Oracle database, but all dates, when an issue is logged or a note added, are stored as integers rather than Oracle dates. The vendor explained to me that these integers are the number of seconds elapsed since 1/1/1970, and sure enough, when I look at one of these ...

2. Subtracting Dates in JAVA    coderanch.com

3. date question    coderanch.com

I run the following code: Calendar cal = Calendar.getInstance(); System.out.println("=======Calendar.YEAR = " + Calendar.YEAR); System.out.println("=======Calendar.MONTH =" + Calendar.MONTH); System.out.println("=======Calendar.DATE = "+ Calendar.DATE); System.out.println( "=======cal.get(Calendar.YEAR) =" + cal.get(Calendar.YEAR)); System.out.println( "=======cal.get(Calendar.MONTH) =" + cal.get(Calendar.MONTH)); System.out.println( "=======cal.get(Calendar.DATE) =" + cal.get(Calendar.DATE)); The results are: =======Calendar.YEAR = 1 =======Calendar.MONTH =2 =======Calendar.DATE = 5 =======cal.get(Calendar.YEAR) =2003 =======cal.get(Calendar.MONTH) =11 =======cal.get(Calendar.DATE) =23 What does it mean by Calendar.YEAR? Why ...

4. Date again...    coderanch.com

5. Specify Date as 0000-00-00    coderanch.com

6. HELP needed on DATE    coderanch.com

Hi there everyone, pls help me . i have a question as above "Code a Java class called Calendar which has a static variable of type Date(initialised to 1st January 2004), a static void method called tock(int days) to advance the variable by the specified number of days, and a static Date method called getDate() to return the current date.". What ...

7. date arithmetic    coderanch.com

8. No.of SUNDAY's between two dates???    coderanch.com

9. DATE Problem    coderanch.com

I can give you hints. Find out how far is the sunday from start date. So if your start date falls on Wed. there are still 4 days to sunday (start date included). deduct this number from the total days. Similarly find out how many days have passed since last sunday w.r.t. the end date. So if your end date is ...





10. Help with Date class    coderanch.com

11. Trouble understanding dates in Java    coderanch.com

12. date has null or not checking    coderanch.com

13. how to get Date ?    coderanch.com

14. java.util.Date question    coderanch.com

What happens when a date is entered like 3/36/04 it takes the amount of days past 31 for the 3rd month in your case 5 more than 31 and rolls it over to the next month and adds 5 days. This is good for adding days when you don't know the amount of days in the month.

15. java dates    coderanch.com





17. Java 5 release date?    coderanch.com

18. To Peter - Best practices for working with dates in Java    coderanch.com

Sonny asks about using dates/times in Java. I can only echo the perceptive words of Vedha Pitkar, who indicates that it is a challenging and indeed vexing area. It is not only Java - this area is challenging in all programming languages. It turns out that there are enough things about dates and times that are non-obvious or even counter-intuitive, that ...

19. Using an int to hold a four digit date    coderanch.com

For an assignment I am currently working through I have to create a validation method that checks a four digit integer rests within 0181 --> 1220 where the first two digits represent the month and the second two digits represent the year. My problem lies with how I can store a number such as 0299 within an integer. I'm not asking ...

20. date.after() problem    coderanch.com

21. Number of weeks between two dates    coderanch.com

Here is a DateDifference class I pick up along the way. import java.util.*; import java.text.*; public class DateDiff { // Test code takes two dates as command-line args... public static void main(String[] args) { DateDiff dd = new DateDiff(); Date then = null, now = null; DateFormat df = DateFormat.getInstance(); df.setTimeZone( TimeZone.getDefault() ); if (args.length < 2) { String pattern = ...

22. date i18n    coderanch.com

Hi Barry, Thanks for the code bit - i really appreciate it. I should not have to code for each locale of visitor I expect to see, since this should be as simple as getting the default date. I suppose that what I need to know is how to configure the JVM properly. I appreciate everyones help - and if i ...

23. Dates (using them, not getting them)    coderanch.com

Can anybody recommend a good resource for learning about Java Dates? I don't completely understand the relationship between GregorianCalendars and Dates and Locales. I have read the API and checked a couple books and I'm still fuzzy. It seems more complicated than it needs to be. Has anybody here read a clear explaination of how to use Dates maybe with some ...

24. System.out to display date    coderanch.com

Hi all, I was wondering if someone could help with a little trick I wanted to do with the System.out.println in my Java classes. Basically in Websphere, you don;t get a date/time before any system outs in your log files, which i would like, so I was wondering if anyone knew of a way I could tell 'Java' to oput the ...

25. Help in Date    coderanch.com

26. Date conversions    coderanch.com

Hiya! First question for y'all. import java.util.*; import java.text.SimpleDateFormat; class ConvertDateSeconds { public static void main(String[] arguments) { String s = new String("2003-08-30 16:00:00"); SimpleDateFormat sdf = (SimpleDateFormat) SimpleDateFormat.getDateTimeInstance(); sdf.applyPattern("yyyy-MM-dd HH:mm:ss"); try { Date temp = sdf.parse(s); Date d = new Date(temp.getTime() + sdf.getTimeZone().getOffset(temp.getTime())); System.out.println("The date was: " + s); System.out.println("The date is: " + d); long longDate = d.getTime(); System.out.println("The ...

27. how to use date in java    coderanch.com

Hi, If I want a user to input a date alone, not with time, how can I do it? Eg. A customer calls to make a reservation at a restaurant, the user has to key in a date that the customer wants to reserve the place for. I can't use int cos validating data will be very troublesome right? Is it ...

28. get the Yesterday's date ??    coderanch.com

Like Damanjit said, use the Calendar's add() method. I'm pasting clips from an example where I was adding a month Calendar cal = Calendar.getInstance(); cal.add( Calendar.MONTH, 1 ); Date date = cal.getTime(); From Calendar API they show subtraction of 5 days: add public abstract void add(int field, int amount)Date Arithmetic function. Adds the specified (signed) amount of time to the given ...

29. Date Functions in Java    coderanch.com

30. Regarding Date functions in java    coderanch.com

31. Incrementing the date    coderanch.com

32. Getting the date    coderanch.com

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33. Dates    coderanch.com

I have an object that needs to be passed with two dates. One is the system date and the other is 24 hrs behind system date. How do I calculate the second date? Do I convert the systemdate into time using getTime method? If I subtract the milliseconds for a day from this time, how do I get back date from ...

34. problem with date    coderanch.com

35. Can't get a date    coderanch.com

36. Dealing with dates    coderanch.com

import java.util.GregorianCalendar; public class Item { public String name; public double price; public GregorianCalendar expiryDate; public Item(String name, GregorianCalendar expiryDate, double price){ this.price = price; this.name = name; this.expiryDate = expiryDate; public Item(String name, String expiryDateString, double price){ this.price = price; this.name = name; //and what do i write here for the expiry date if i want it to be //converted ...

37. date overlapping    coderanch.com

hi, Have a good day............ now i have four dates in long format ( converted by UTC date method) in long format, we can comparision using "<",">" operator. now i want to find ovarlapping. how many condition i have to checked. suppose in databse, fromdate value - 10-jul-2005. todate value- 12-jul-2005 now user enter fromdate value from UI,like 11-jul-2005. and totime ...

39. I just want the Date !    coderanch.com

40. need some help (java.util.Date)    coderanch.com

hello all. could anyone please help me or give me some input about a small problem i have run in to. okay, im writing a program that will read in 3 different text files and have them sorted into array lists. well i am working on the 3 main class definitions and i have run into a problem. the first 2 ...

41. Getting the date of today    coderanch.com

42. Date issues!    coderanch.com

43. Checking Date    coderanch.com

Praveen, that site lists JavaScript calendars, not Java. I've written a DateChooser class once, similar to javax.swing.ColorChooser (you need JGoodies Forms for the layout - feel free to edit if you don't want the library): /* * DateChooser.java - a panel for selecting dates. * Copyright (C) 2004 Rob Spoor * * This program is free software; you can redistribute it ...

44. updating the date    coderanch.com

i have been writing a class for a server of a message board to store the title of a topic, the date of the last post, the message ID, the author of the message and the no.of messages on a topic. iv written this all fine but im now trying to write a method that should be called to update the ...

45. Date Confusion    coderanch.com

I am building a form that allows a user to select two dates(input boxes)in which to perform a search on. The users entered criteria will always be formatted to the MM/dd/yyyy format. However, in order for my query to work I need to format the date as follows: yyyy/MM/dd. Otherwise I get the following exception: Failed to connectjava.sql.SQLException: [Sybase][ODBC Driver][Adaptive Server ...

46. Problem regarding Date class    coderanch.com

Calendar todayCalendar = Calendar.getInstance(); int dayOfWeek = todayCalendar.get(Calendar.DAY_OF_WEEK); if (dayOfWeek == Calendar.MONDAY) { return "whatever"; } else if (dayOfWeek == Calendar.TUESDAY) { return ""; } else if (dayOfWeek == Calendar.WEDNESDAY) { return "whatever"; } else if (dayOfWeek == Calendar.THURSDAY) { return "whatever"; } else if (dayOfWeek == Calendar.TUESDAY) { return "whatever"; } else if (dayOfWeek == Calendar.WEDNESDAY) { return "whatever"; } ...

47. How to subtract the date value    coderanch.com

48. date    coderanch.com

49. How to get tomorrow's date?    coderanch.com

Use format() instead of parse(). The format() method is for formatting a Date object into a String. The parse() is to parse a String into a Date object. Here is a basic example:public static String calendarToString(Calendar calendar, String dateFormat){ if (calendar == null || dateFormat == null) { return null; } SimpleDateFormat simpleDateFormat = new SimpleDateFormat(dateFormat); return simpleDateFormat.format(calendar.getTime()); } public static ...

50. DATE    coderanch.com

51. Date    coderanch.com

hi...i have a problem for the date....i have 2 listbox that is display all the date.....i can choose the date between....for example i want to display the data from 22/11/06 to 30/11/06....how the calender or date method can use to compare this two date....because i only want the date from 22 to 20.... can i use the calender or date method ...

52. Date problem    coderanch.com

hi, I am using that yearvariablename or monthvaraiblename for taking input from user. I am separately taking date,month and year from user. So, I am passing this. Ultimately I have to take a date from user and I have to display past four dates of the user given date. I also have to pass those dates through session so that I ...

53. new Date and currentTimeMillis    coderanch.com

54. checking for date    coderanch.com

55. Date function    coderanch.com

Note that it is the Date constructor that is interpreting the String, not the DateFormat.format() call. The Javadoc says that when interpreting a string of decimal numbers If the number is followed by a slash, it is regarded as a month ... unless a month has already been recognized, in which case it is regarded as a day of the month. ...

56. Date CLass    coderanch.com

I hope this is the right place for this. Ok I am studying for a final test in my java class (groan). I have been trying to run through all of the codes in chapter 8 of Java How to Program 6th edition and I have hit the wall on 8.16. Here are the books requirements: (Date Class) Create class Date ...

57. Date CLass    coderanch.com

I hope this is the right place for this. Ok I am studying for a final test in my java class (groan). I have been trying to run through all of the codes in chapter 8 of Java How to Program 6th edition and I have hit the wall on 8.16. Here are the books requirements: (Date Class) Create class Date ...

58. How to get previous date    coderanch.com

59. Date Function    coderanch.com

Hi friends, Check the following code : String[] monthName = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", Aug","Sep", "Oct", "Nov", "Dec"}; int forMon = 0; Calendar fromCal = Calendar.getInstance(); Calendar toCal = Calendar.getInstance(); String forMonth = monthName[3]; // selMonth is the month value which i selected from DropDown for (int i = 0; i < 12; i++) { if (forMonth.equals(monthName[i])) { ...

60. Dates    coderanch.com

61. "Date" Problem    coderanch.com

62. using date as condition    coderanch.com

i have to extract date and get/post from apache log comman format (194.116.215.20 - - [14/Nov/2005:22:28:57 +0000] "GET / HTTP/1.0" 200 16440) and then i have to count no of Gets and Posts within particular dates. so in my program i am able to extract the dates but then i am not able to put the condition for which i need ...

63. Date Issue in Java 1.5    coderanch.com

64. Checking Date    coderanch.com

65. Date manipulation problem    coderanch.com

import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; public class Test { private Date formattedExpDate = null; private Date formattedFromDate = null; public static void main(String[] args) { String reptExpDate = "2007-12-02"; String fromDate = "01/03/2007"; // lINE 1 new Test().checkValidFromDate(reptExpDate, fromDate); } public boolean checkValidFromDate(String rptExpDate, String fromDate) { try { System.out.println("Expiry date is: " + rptExpDate); System.out.println("From Date entered ...

66. Date class    coderanch.com

I want to get of after 30 days...if 2day is the 1st of April..The program must return 31st of April..please help me /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package com.example.test; import java.util.Calendar; import java.text.SimpleDateFormat; /** * * @author Administrator */ public class DateUtils { public static String now(String ...

67. Java Date    coderanch.com

68. Set holding two dates    coderanch.com

69. date addition    coderanch.com

70. Showing Date if no value    coderanch.com

private Date subDate; public Date getSubDate(){ SimpleDateFormat formatter = new SimpleDateFormat ("MMMM dd, yyyy"); return formatter.format(this.subDate); } /* Also tried this just to put a value in there if null but it didnt work: public Date getSubDate(){ if((subDate == null) { subDate = null; } SimpleDateFormat formatter = new SimpleDateFormat ("MMMM dd, yyyy"); return formatter.format(this.subDate); } */ public void setSubDate(Date subDate){ ...

71. Crazy date program    coderanch.com

I fixed my original problem but now this code only works up to a certain point. I had it working fine but then i changed some variable names and i messed up something and im not sure what. It stops where the ***** are and wont doing anything below.Hopefully you more experienced programmers out there can tell me what is wrong. ...

72. Is Date Between Two Dates    coderanch.com

73. System Date    coderanch.com

74. related to Date    coderanch.com

Ashwini, It sounds like you want to match "Wed Jul 16 18:31:04 GMT+05:30 2008" and are trying "dd/MM/yyyy" as the format. Clearly this won't work. What happens when you try writing a format expression that represents the full string based on the format symbols in SimpleDateFormatter. You will likely find it easier to write a test program so you can gradually ...

75. how can i get the date on next sunday    coderanch.com

Use Calendar.get(Calendar.DAY_OF_WEEK) to determine what day of the week it is. Then subtract that from Calendar.SUNDAY, and add 7 if needed. Pass that number to Calendar.add: Calendar calendar = Calendar.getInstance(); int weekday = calendar.get(Calendar.DAY_OF_WEEK); int days = Calendar.SUNDAY - weekday; if (days < 0) { // this will usually be the case since Calendar.SUNDAY is the smallest days += 7; } ...

76. Date problem Not resolved    coderanch.com

77. Method to translate returns from Date(); to degrees to revolve a jpg/gif    coderanch.com

Dear Programmers, I wanted to post a new thread as the earlier I get started with it the sooner I can make progress on it. I want to create a program which would use a circular image- say a jpg, or gif that would revolve. I could get the rate of degrees that the jpg/gif would revolve from the return of ...

78. BigDecimal to Date    coderanch.com

79. Date Program Error    coderanch.com

I got an error when trying to write a Gui Date program. My code and error are below and I have no idea how to fix it. I'm sure it's something small that I am overlooking but can't find it. Here is my code: import javax.swing.*; import java.awt.event.*; import java.awt.Container; import java.util.*; import java.text.*; public class GuiDate extends JFrame { private ...

80. Regarding java.util.Date    coderanch.com

81. Date help    coderanch.com

I need to display page depending on dates between todays date and June 15 2009 ---I need to display page1.htm after june 15 2009 I need to display page2.htm here is what I have done: get month =Integer.parseInt(sdf.format(currdate)); day =Integer.parseInt(sdf.format(currdate)); year =Integer.parseInt(sdf.format(currdate)); if( (month>=6)&& (day>=1) &&(year!=2008)){ show page1.htm else show page2.htm This is not working if i have current date as ...

82. Create Date Object with a past date    coderanch.com

83. DATE SUBRACTION    coderanch.com

Hi folks I have two columns in database which has date and time. I am taking using result set two different dates , suppose d1 and d2 as getString method. Now i want to subtract these two dates and store the result as a string. The dates subtracted should have the remaining days as hours converted and added to the subtracted ...

84. Date Generation    coderanch.com

85. is date valid    coderanch.com

Sunil Kumar wrote:Use simple date format like this public static boolean validateDate(String dateStr, String formatStr) { if (formatStr == null) return false; SimpleDateFormat df = new SimpleDateFormat(formatStr); Date testDate = null; try { testDate = df.parse(dateStr); } catch (ParseException e) { return false; } if (!df.format(testDate).equals(dateStr)) return false; return true; } There are two improvements that can be made: - turn ...

86. Date object    coderanch.com

I have problem with Date object here my code: GregorianCalendar calender = new GregorianCalendar(); String SQL_QUERY = "select foo.date" + " from Foo foo"; Query query = session.createQuery(SQL_QUERY); for (Iterator it = query.iterate(); it.hasNext();) { Date date = (Date) it.next(); System.out.println("date: " + date); if(date==calender.getTime()){ //what i need: System.out.println("HELLO the same"); }else{ System.out.println("HELLO arent the same"); } } ---------- The problem ...

87. Get N-Days before today using Date    coderanch.com

Hi, To get N-Days before today, I know Calendar.add() works fine. But, I thought Date date=new Date(System.currentTimeMillis()-N*24*60*60*1000); will also work. So I wrote test code as below public void test() { long base=System.currentTimeMillis(); for (int N=0;N<100;N++) { Date date=new Date(base-N*24*60*60*1000); System.out.println(N+" days before: "+date); } } But, it makes wrong results as below 1 days before: Sun Feb 01 15:31:20 KST ...

88. Date Logic, Lost XPost    coderanch.com

Hello, I did post this on other forum where I just received rude replies ! I think I better post here, my fav forum. Heres the problem : In my app. there is a window where i need to display orders. This window shows dates from Monday to Sunday in a weekly fashion and displays the orders for the week being ...

89. Can I get the date of a specific weekday with the weeknumber as attribute?    coderanch.com

Hello! I'm currently working on a webapp which is supposed to handle the booking of several conference rooms. Right now I'm trying to make a class that can get all the days of a specific week, and set their dates. In the end you should be able to ask for any given week a specific year, and get a list of ...

90. date problem    coderanch.com

I have the day of week (eg monday),week of year (eg 41) and year (eg 2007) From this I want to calculate the date in the form dd/MM/yyyy but i am not sure how to do this. Searches on google and such have not provided me with a solution to my problem. What I attempted to do was take the week ...

91. Reformating date    coderanch.com

92. how to determine if two "Date" are same ?    coderanch.com

the equals method tests equality right down to the millisecond. I've just been doing some date/time calculations recently and remembered very quickly how much of a pain the standard java implementations are. If you are ok using other API's then something like DateUtils from apache commons lang may be of use. It contains an "isSameDay" method. Other than that you will ...

93. Wrongly Date is updated    coderanch.com

Hello, I tried to insert the date in the format dd/MM/yyyy into the mysql where the format is yyyy-MM-dd. Please see the screnario below The issue was, the entered month is taken as date and entered date is taken as month. So if the date entered is 13, then month is become 1 (13 - 12) and remaining 12 month is ...

94. showing date for specific reports    coderanch.com

95. Util package date    coderanch.com

Date or Calendar objects have no formatting; they can be formatted into string objects, but then you can't apply methods like before/after. So this: "(2009-05-08 21:00:00.0)after(Sun Mar 15 00:00:00 PST 2009)" doesn't make sense because it deals with String objects, not Dates or Calendars. If you want to consider different time zones then you should use Calendar, not Date - Date ...

96. user input date?    coderanch.com

hi all, i have to connect to a server and get the history details of telephone calls. to that i have a client with me. before get the history the start date and end date should be given. this is done in console. can somebody explain how to do this? thanks in advance. ushan

98. Date Displaying issue    coderanch.com

I have a Orace DB in India. one field is Date. This field value is inserted from a stored procudure. I mean java code is not providing this date value. I get the Date value in following way 1. get Result Set 2. using resultset metadata, if my datatype is timestamp (i.e. Date) then create a new Date object. java.sql.Timestamp timestamp ...

99. Date problem    coderanch.com

100. simple date    coderanch.com

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