The IStyledLabelProvider is used to style the representation of the tree viewer, as used by the Java outline viewer to display the return type of the method, and by the team's decorator when showing when changes have occurred.
Add the
IStyledLabelProviderinterface to theTimeZoneLabelProviderclass, and create thegetStyledTextmethod. If the selected element is aMap.Entrythat contains aZoneId, add the offset afterwards in brackets:public class TimeZoneLabelProvider extends LabelProvider implements IStyledLabelProvider { public StyledString getStyledText(Object element) { String text = getText(element); StyledString styledString = new StyledString(text); if (element instanceof ZoneId) { ZoneId zone = (ZoneId)element; ZoneOffset offset = ZonedDateTime.now(zone).getOffset(); styledString.append(" (" + offset + ")", StyledString.DECORATIONS_STYLER); } return styledString; } }In order to use the styled...