Query with Date in java

**Gunner 1** · 12-02-2010

Hello,
I am trying a program in java which is related to Date format. But i think i have a problem with date in java. Here is my code, just go through it

Code:

Calendar cal = Calendar.getInstance(Local.ENGLISH);
cal.setTimeInMillis(1000);
String date = String.function valueOf() {
    [native code]
}(cal.get(Calendar.HOUR))+":"+
                   String.function valueOf() {
    [native code]
}(cal.get(Calendar.MINUTE))+":"+
                   String.function valueOf() {
    [native code]
}(cal.get(Calendar.SECOND));

**GlassFish** · 12-02-2010

Hello,
This is normal, because getInstance (Local) only modifies the localization (language + format) but not the time zone (which is the default). If you want to use the GMT time zone as I think you should specify it explicitly.

Code:

Calendar cal = Calendar.getInstance(TimeZone.getTimezone("GMT"));

I hope you are understanding what I am trying to say here. If you want more information on this then you can ask.

**Linux-Us** · 12-02-2010

Hello,
When using the function getTime () of the Calendar class to get a Date object, it returns automatically to local time.

Code:

Calendar cal = Calendar.getInstance(TimeZone.getTimezone("GMT"));
cal.set(Calendar.HOUR_OF_DAY, 23);
System.out.System.out.println(cal.get(Calendar.HOUR_OF_DAY) );
/ / 25 well done
System.out.System.out.println(cal.getTime().getHours());
/ / gives 1 ...

I think there is a simple conversion of milliseconds regardless of anything else.

**SoftWore** · 12-02-2010

Hello,
I think you are getting it wrong. Already method getHours () is deprecated and should not be used, then in its documentation it is stated that the reference time in the timezone of the machine and if you have the same timezone as me there are 2 hours apart with the GMT time zone. If you want more information on this then you can visit the official site of the sun for the api on java, that will definitely help you.

**cyber-noob** · 12-02-2010

Hello,
Just have a look at the following code, this is the basic code showing how to use the format of date in java.

Code:

DateFormat dtfr = new SimpleDateFormat ("yyyy/MM/dd HH:mm:ss");
        java.util.Date dt = new java.util.Date ();
        String dtStr = dtfr.format (dt);
        try{
        Date dt2 = dtfr.parse (dtStr);
        }catch(ParseException pe){
            pe.printStackTrace();}

**SoftWore** · 12-02-2010

Hello,
This is a advanced code, please go through it and understand as much as you can.

Code:

public boolean isAfterPayDay(DateTime dttm) {
  if (dttm.getMonthOfYear() == 2) {   // February is month 2!!
    return dttm.getDayOfMonth() > 26;
  }
  return dttm.getDayOfMonth() > 28;
}

public Days daysToNewYear(LocalDate fromDate) {
  LocalDate nwy = fromDate.plusYears(1).withDayOfYear(1);
  return Days.daysBetween(fromDate, nwy);
}

public boolean isRentalOverdue(DateTime dttmRented) {
  Period rntprd = new Period().withDays(2).withHours(12);
  return dttmRented.plus(rntprd).isBeforeNow();
}

public String getBirthMonthText(LocalDate dateOfBirth) {
  return dateOfBirth.monthOfYear().getAsText(Locale.ENGLISH);
}