I am using Java 17. I am trying to parse different strings as ZonedDateTime but when I try to convert it to an Instant, the output is not as expected. For eg:

        String first = "2020-01-08T21:00:00Z[Europe/Berlin]";
        ZonedDateTime zone1 = ZonedDateTime.parse(first);
        String second = "2020-01-08T20:00:00Z[UTC]";
        ZonedDateTime zone2 = ZonedDateTime.parse(second);
        System.out.println(zone1.toInstant());
        System.out.println(zone2.toInstant());

The output is (this is wrong, both times should be same):

2020-01-08T21:00:00Z
2020-01-08T20:00:00Z

However, when I create a ZonedDateTime object using constructor and ZoneId I get correct output:

        ZonedDateTime z1 = ZonedDateTime.of(2020,1,8,21,0,0,0,ZoneId.of("Europe/Berlin"));
        System.out.println(z1.toInstant());
        
        ZonedDateTime z2 = ZonedDateTime.of(2020,1,8,20,0,0,0,ZoneId.of("UTC"));
        System.out.println(z2.toInstant());

Output:

2020-01-08T20:00:00Z
2020-01-08T20:00:00Z

Can anyone tell me why my parse method is not working as expected?

Note: This issue is NOT related to DST bug for ZonedTimeZone in JDK8: