Tutorial System like azRank [Comparing dates]

Hi guys!

Today i wanna show u how to compare dates and use something like azRank system [maybe have another :c]


I will try to explain you how to use this and make from this some useful things :>

Let's start

I will create return method named : getDaysBetweenTwoDates

Code:

public int getDaysBetweenTwoDates(){

}

Now we need to add parameters to compare :>

We will use two GregorianCalendars

Code:

public int getDaysBetweenTwoDates(GregorianCalendar g1, GregorianCalendar g2) {

}

Now we create a counter integer

Code:

public int getDaysBetweenTwoDates(GregorianCalendar g1, GregorianCalendar g2) {
int days = 0;
}

Now we create clones for that calendars, and check what's after and earlier [in parameters].

Code:

public int getDaysBetweenTwoDates(GregorianCalendar g1, GregorianCalendar g2) {
int days = 0;
GregorianCalendar gc1, gc2;
if(g1.after(g2)){
   gc1 = (GregorianCalendar) g1.clone();
   gc2 = (GregorianCalendar) g2.clone();
}else{
   gc1 = (GregorianCalendar) g2.clone();
   gc2 = (GregorianCalendar) g1.clone();
}
}

Now we need to clear all from this calendars but not days. Need to use a loop.

Code:

public int getDaysBetweenTwoDates(GregorianCalendar g1, GregorianCalendar g2) {
int days = 0;
GregorianCalendar gc1, gc2;
if(g1.after(g2)){
   gc1 = (GregorianCalendar) g1.clone();
   gc2 = (GregorianCalendar) g2.clone();
}else{
   gc1 = (GregorianCalendar) g2.clone();
   gc2 = (GregorianCalendar) g1.clone();
}
  gc1.clear(Calendar.MILLISECOND);
  gc1.clear(Calendar.SECOND);
  gc1.clear(Calendar.MINUTE);
  gc1.clear(Calendar.HOUR_OF_DAY);
  gc2.clear(Calendar.MILLISECOND);
  gc2.clear(Calendar.SECOND);
  gc2.clear(Calendar.MINUTE);
  gc2.clear(Calendar.HOUR_OF_DAY);

  while(gc1.before(gc2) ) {
     gc1.add(Calendar.DATE, 1);
     days++;
  }
  return days;
}

And that's all !
If u have any questions just tell me :>


Example use:

Code:

GregorianCalendar dd = new GregorianCalendar();
GregorianCalendar dd2 = new GregorianCalendar(dd.getTime().getYear(), dd.getTime().getMonth() + 3, dd.getTime().getDay());
int howmanydays = getDaysBetweenTwoDates(dd, dd2);

Sorry for my english

 

@Plugers11
Or just get two Dates and then

Code:

int daysBetween = (int) ((d2.getTime() - d1.getTime()) / (1000 * 60 * 60 * 24));