80. Explaining the difference between Clock.systemUTC() and Clock.systemDefaultZone()

Let’s start with the following three lines of code:

System.out.println(Clock.systemDefaultZone()); System.out.println(system(ZoneId.systemDefault())); System.out.println(Clock.systemUTC()); 

The output reveals that the first two lines are similar. Both of them display the default time zone (in my case, Europe/Bucharest):

SystemClock[Europe/Bucharest] SystemClock[Europe/Bucharest] 

The third line is different. Here, we see Z time zone, which is specific to the UTC time zone and indicates the presence of a zone offset:

SystemClock[Z] 

On the other hand, creating an Instant reveals that Clock.systemUTC() and Clock.systemDefaultZone() produce the same result:

System.out.println(Clock.systemDefaultZone().instant()); System.out.println(system(ZoneId.systemDefault()).instant()); System.out.println(Clock.systemUTC().instant()); 

The instant time is the same in all three...