--- /dev/null	2019-05-17 16:40:11.000000000 +0800
+++ new/test/jdk/java/util/Calendar/JapanEraNameCompatTest.java	2019-05-17 16:40:11.000000000 +0800
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8218781
+ * @summary Test the localized names of Japanese era Reiwa from COMPAT provider.
+ * @modules jdk.localedata
+ * @run testng/othervm -Djava.locale.providers=COMPAT JapanEraNameCompatTest
+ */
+
+import static java.util.Calendar.*;
+import static java.util.Locale.*;
+
+import java.time.LocalDate;
+import java.time.chrono.JapaneseChronology;
+import java.time.chrono.JapaneseEra;
+import java.time.format.DateTimeFormatter;
+import java.time.format.DateTimeParseException;
+import java.time.format.TextStyle;
+import java.util.Calendar;
+import java.util.Locale;
+
+import org.testng.annotations.DataProvider;
+import org.testng.annotations.Test;
+import static org.testng.Assert.assertEquals;
+
+@Test
+public class JapanEraNameCompatTest {
+    static final Calendar c = new Calendar.Builder()
+            .setCalendarType("japanese")
+            .setFields(ERA, 5, YEAR, 1, MONTH, MAY, DAY_OF_MONTH, 1)
+            .build();
+    static final String EngName = "Reiwa";
+    static final String CJName = "\u4ee4\u548c";
+    static final String KoreanName = "\ub808\uc774\uc640";
+    static final String ArabicName = "\u0631\u064a\u0648\u0627";
+    static final String ThaiName = "\u0e40\u0e23\u0e27\u0e30";
+    static final String HindiName = "\u0930\u0947\u0907\u0935\u093e";
+    static final String RussianName = "\u0420\u044d\u0439\u0432\u0430";
+    static final String SerbianName = "\u0420\u0435\u0438\u0432\u0430";
+    static final String SerbLatinName = "Reiva";
+
+    @DataProvider(name="FormatData")
+    Object[][] dataFormatData() {
+        return new Object[][] {
+            //locale,   long,       short
+            { JAPAN,    CJName,     "R" },
+            { KOREAN,   KoreanName, "R" },
+            { CHINA,    CJName,     "R" },
+            { TAIWAN,   CJName,     "R" }, // fallback to zh
+            { new Locale("ar"), ArabicName, ArabicName },
+            { new Locale("th"), ThaiName, "R" },
+            // hi_IN fallback to root in FormatData resources
+            { new Locale("hi", "IN"), EngName, "R" }
+        };
+    }
+
+    @Test(dataProvider="FormatData")
+    public void testCalendarEraDisplayName(Locale locale,
+            String longName, String shortName) {
+        assertEquals(c.getDisplayName(ERA, LONG, locale), longName);
+        assertEquals(c.getDisplayName(ERA, SHORT, locale), shortName);
+    }
+
+    @DataProvider(name="JavaTimeSupplementary")
+    Object[][] dataJTS() {
+        return new Object[][] {
+            // JavaTimeSupplementary
+            { JAPAN, CJName, CJName },
+            { KOREAN, KoreanName, KoreanName },
+            { CHINA, CJName, CJName },
+            { TAIWAN, CJName, CJName },
+            { new Locale("ar"), ArabicName, ArabicName },
+            { new Locale("th"), ThaiName, ThaiName },
+            { new Locale("hi", "IN"), HindiName, HindiName },
+            { new Locale("ru"), RussianName, RussianName },
+            { new Locale("sr"), SerbianName, SerbianName },
+            { Locale.forLanguageTag("sr-Latn"), SerbLatinName, SerbLatinName },
+            { new Locale("hr"), EngName, EngName },
+            { new Locale("in"), EngName, EngName },
+            { new Locale("lt"), EngName, EngName },
+            { new Locale("nl"), EngName, EngName },
+            { new Locale("no"), EngName, "R" },
+            { new Locale("sv"), EngName, EngName },
+            // el fallback to root in JTS resources
+            { new Locale("el"), EngName, EngName }
+        };
+    }
+
+    @Test(dataProvider="JavaTimeSupplementary")
+    public void testChronoJapanEraDisplayName(Locale locale,
+            String fullName, String shortName) {
+
+        JapaneseEra era = JapaneseEra.valueOf("Reiwa");
+        assertEquals(era.getDisplayName(TextStyle.FULL, locale), fullName);
+        assertEquals(era.getDisplayName(TextStyle.SHORT, locale), shortName);
+        assertEquals(era.getDisplayName(TextStyle.NARROW, locale), "R");
+    }
+
+    // If in JTS resource defined the Japanese era array, but missing the elem
+    // of Reiwa, parse would throw the DateTimeParseException.
+    @Test
+    public void findMissingJTS() {
+        LocalDate date = LocalDate.of(2019, 5, 1);
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy MM dd GGGG");
+        formatter = formatter.withChronology(JapaneseChronology.INSTANCE);
+
+        int num = 0;
+        for (Locale locale : Calendar.getAvailableLocales()) {
+            formatter = formatter.withLocale(locale);
+            try {
+                LocalDate.parse(date.format(formatter), formatter);
+            } catch (DateTimeParseException e) {
+                num++;
+                System.out.println("Missing JTS data for locale: " + locale);
+            }
+        }
+        if (num > 0) {
+            throw new RuntimeException("Missing some JTS data update");
+        }
+    }
+}