src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/taglets/TagletManager.java

@@ -250,12 +250,11 @@
                     ((StandardJavaFileManager) fileManager).setLocation(TAGLET_PATH, paths);
                 }
             }
             tagClassLoader = fileManager.getClassLoader(TAGLET_PATH);
             Class<?> customTagClass = tagClassLoader.loadClass(classname);
-            @SuppressWarnings("deprecation")
-            Object instance = customTagClass.newInstance();
+            Object instance = customTagClass.getConstructor(new Class<?>[0]).newInstance((Object[])null);
             Taglet newLegacy = new UserTaglet((jdk.javadoc.doclet.taglet.Taglet)instance);
             String tname = newLegacy.getName();
             Taglet t = customTags.get(tname);
             if (t != null) {
                 customTags.remove(tname);