7079486: Locale.getDisplayScript() (no args) does not honor default DISPLAY locale

Reviewed-by: okutsu

src/share/classes/java/util/Locale.java

@@ -1589,7 +1589,7 @@ public final class Locale implements Cloneable, Serializable {
      * @since 1.7
      */
     public String getDisplayScript() {
-        return getDisplayScript(getDefault());
+        return getDisplayScript(getDefault(Category.DISPLAY));
     }
 
     /**

test/java/util/Locale/LocaleCategory.java

@@ -56,6 +56,7 @@ public class LocaleCategory {
                                   Locale.getDefault().getVariant())).build();
             checkDefault();
             testGetSetDefault();
+            testBug7079486();
         } finally {
             // restore the reserved locale
             Locale.setDefault(reservedLocale);
@@ -82,5 +83,24 @@ public class LocaleCategory {
             throw new RuntimeException("setDefault() should set all default locales for all categories");
         }
     }
+
+    static void testBug7079486() {
+        Locale zh_Hans_CN = Locale.forLanguageTag("zh-Hans-CN");
+
+        // make sure JRE has zh_Hans_CN localized string
+        if (zh_Hans_CN.getDisplayScript(Locale.US).equals(zh_Hans_CN.getDisplayScript(zh_Hans_CN))) {
+            return;
+        }
+
+        Locale.setDefault(Locale.US);
+        String en_script = zh_Hans_CN.getDisplayScript();
+
+        Locale.setDefault(Locale.Category.DISPLAY, zh_Hans_CN);
+        String zh_script = zh_Hans_CN.getDisplayScript();
+
+        if (en_script.equals(zh_script)) {
+            throw new RuntimeException("Locale.getDisplayScript() (no args) does not honor default DISPLAY locale");
+        }
+    }
 }
 

test/java/util/Locale/LocaleCategory.sh

 #!/bin/sh
 #
 # @test
-# @bug 4700857 6997928
+# @bug 4700857 6997928 7079486
 # @summary tests for Locale.getDefault(Locale.Category) and 
 #    Locale.setDefault(Locale.Category, Locale)
 # @build LocaleCategory