TimeZoneNames.java

import java.lang.reflect.Method;
import java.text.DateFormatSymbols;
import java.util.Arrays;
import java.util.Locale;

public final class TimeZoneNames {
    public static void main(final String[] args) throws Exception {
        final String[][] internal = getInternalZoneStrings();
        final String[][] standard = getStandardZoneStrings();
        System.out.printf("%d : %d\n", internal.length, standard.length);
        if (internal.length == standard.length) {
            for (int i = 0; i < internal.length; ++i) {
                if (Arrays.equals(internal[i], standard[i])) {
                    System.out.println("true");
                    print(internal[i]);
                } else {
                    System.out.println("false");
                    print(standard[i]);
                    print(internal[i]);
                }
            }
        }
    }

    private static String[][] getInternalZoneStrings() throws Exception {
        final Class<?> clazz = Class.forName("sun.util.locale.provider.TimeZoneNameUtility");
        final Method method = clazz.getMethod("getZoneStrings", Locale.class);
        final Object zoneStringsObject = method.invoke(null, Locale.ENGLISH);
        return (String[][]) zoneStringsObject;
    }

    private static String[][] getStandardZoneStrings() throws Exception {
        final DateFormatSymbols symbols = DateFormatSymbols.getInstance(Locale.ROOT);
        return symbols.getZoneStrings();
    }

    private static void print(final String[] zoneStrings) {
        System.out.printf("  ID: %s\n", zoneStrings[0]);
        System.out.printf("  Long  (standard): %s\n", zoneStrings[1]);
        System.out.printf("  Short (standard): %s\n", zoneStrings[2]);
        System.out.printf("  Long  (daylight): %s\n", zoneStrings[3]);
        System.out.printf("  Short (daylight): %s\n", zoneStrings[4]);
    }
}