Question

This is a really simple request, but I am not quite sure the easiest/most efficient way of generating these two values.

I need to write a script that will check whether a given value is between two values. I am well aware of how this is done in SQL.

The way I need the values is somethign similar to the following.

Date testValue = new Date()       //This represents the value we are testing

Date beginningOfDay = ....        //This value would represent the date for 
                                    testValue  at 12:00am

Date endOfDay = ...               //This value would represent the date for 
                                   testValue at 11:59:59pm

Again, the Java Date() type may not be the best practice to do something like this. In the end I just need to generate three values that I can say

if testValue is after beginningOfDay && testValue is before endOfDay 
     //do logic

Answer 1

Personally I use the Calendar object for this. For example:

Date testDate = ??? //Replace with whatever source you are using
Calendar testDateCalendar = Calendar.getInstance();
testDateCalendar.setTime(testDate);

Date today = new Date();
Calendar endOfDay = Calendar.getInstance();  //Initiates to current time
endOfDay.setTime(today);
endOfDay.set(Calendar.HOUR_OF_DAY, 23);
endOfDay.set(Calendar.MINUTE, 59);
endOfDay.set(Calendar.SECOND, 59);

Calendar startOfDay = Calendar.getInstance();
startOfDay.setTime(today);
startOfDay.set(Calendar.HOUR_OF_DAY, 0);
startOfDay.set(Calendar.MINUTE, 0);
startOfDay.set(Calendar.SECOND, 0);

if (startOfDay.before(testDateCalendar) && endOfDay.after(testDateCalendar))
{
//Whatever
} else {
//Failure
}