Second Class Converts Date Wrong near Daylight Savings Switch

[howlettga]

The org.jfree.data.time.Second constructor takes a Date object. However it converts the Date object to a Second object incorrectly around around the time daylight savings switches. Take the following code:

Date date = new Date(1667711700*1000);  // unix epoch timestamp
Second second = new Second(date);
System.out.println(date.toString());  // Sun Nov 06 01:15:00 EDT 2022
System.out.println(second.toString());  // Sun Nov 06 01:15:00 EST 2022

As you can see, the Second object is holding onto Standard time but the Date is actually in Daylight time. This becomes an issue with something like this:

Long time1 = 1667711700;
Long time2 = 1667715300;
Second second1 = new Second(new Date(time1*1000));  // Sun Nov 06 01:15:00 EST 2022
Second second2 = new Second(new Date(time2*1000));  // Sun Nov 06 01:15:00 EST 2022

Despite these being two different times, an hour apart, they are viewed by jfree as the same time. I therefore cannot plot them both on a time series plot. This appears to be happening to the Minute class as well as Second class.