6882559: new JEditorPane("text/plain","") fails for null context class loader

Reviewed-by: serb, aivanov

src/share/classes/javax/swing/JEditorPane.java

@@ -24,15 +24,12 @@
  */
 package javax.swing;
 
-import sun.swing.SwingUtilities2;
 
 import java.awt.*;
-import java.awt.event.*;
 import java.lang.reflect.*;
 import java.net.*;
 import java.util.*;
 import java.io.*;
-import java.util.*;
 
 import javax.swing.plaf.*;
 import javax.swing.text.*;
@@ -1187,7 +1184,7 @@ public class JEditorPane extends JTextComponent {
         if (k == null) {
             // try to dynamically load the support
             String classname = getKitTypeRegistry().get(type);
-            ClassLoader loader = getKitLoaderRegistry().get(type);
+            ClassLoader loader = getKitLoaderRegistry().get(type).orElse(null);
             try {
                 Class c;
                 if (loader != null) {
@@ -1244,7 +1241,7 @@ public class JEditorPane extends JTextComponent {
      */
     public static void registerEditorKitForContentType(String type, String classname, ClassLoader loader) {
         getKitTypeRegistry().put(type, classname);
-        getKitLoaderRegistry().put(type, loader);
+        getKitLoaderRegistry().put(type, Optional.ofNullable(loader));
         getKitRegisty().remove(type);
     }
 
@@ -1265,7 +1262,7 @@ public class JEditorPane extends JTextComponent {
         return (Hashtable)SwingUtilities.appContextGet(kitTypeRegistryKey);
     }
 
-    private static Hashtable<String, ClassLoader> getKitLoaderRegistry() {
+    private static Hashtable<String, Optional<ClassLoader>> getKitLoaderRegistry() {
         loadDefaultKitsIfNecessary();
         return (Hashtable)SwingUtilities.appContextGet(kitLoaderRegistryKey);
     }

test/javax/swing/JEditorPane/6882559/bug6882559.java

+/*
+ * Copyright (c) 2016, 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 6882559
+   @summary new JEditorPane("text/plain","") fails for null context class loader
+   @author Mikhail Cherkasov
+   @run main bug6882559
+*/
+
+import javax.swing.*;
+
+
+public class bug6882559 {
+    public static void main(String[] args) throws Exception {
+        SwingUtilities.invokeAndWait(() -> {
+            Thread.currentThread().setContextClassLoader(null);
+            new javax.swing.JEditorPane("text/plain", "");
+        });
+    }
+}