Calendar: can't set value for ZONE_OFFSET and roll() throw exception.
Calendar.ZONE_OFFSET is one of the time field. set and roll should work.

Please run the attched code. The output is shown after.
Run with DST_OFFSET, Similar things happened.
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import java.util.*;
import java.text.*;

public class Test{
   public static void main(String[] args){
      
      Calendar cal = Calendar.getInstance();
      cal.clear();
      cal.set(2002, 2, 2, 10, 30, 30);
      cal.get(Calendar.YEAR);
      cal.get(Calendar.MONTH);
      cal.get(Calendar.DATE);
      cal.get(Calendar.HOUR);
      cal.get(Calendar.MINUTE);
      cal.get(Calendar.SECOND);
      System.out.println(cal.get(Calendar.ZONE_OFFSET));
      
      cal.set(Calendar.ZONE_OFFSET, 360000);
      System.out.println(cal.get(Calendar.ZONE_OFFSET));
      
      cal.roll(Calendar.ZONE_OFFSET, true);
      System.out.println(cal.get(Calendar.ZONE_OFFSET));
   }
}

------
output:
-28800000
-28800000
Exception in thread "main" java.lang.IllegalArgumentException
        at java.util.GregorianCalendar.roll(GregorianCalendar.java:1074)
        at java.util.GregorianCalendar.roll(GregorianCalendar.java:721)
        at Test.main(Test.java:21)