src/java.base/share/classes/java/lang/ClassLoader.java

@@ -102,13 +102,13 @@
  * resource, a <tt>ClassLoader</tt> instance will delegate the search for the
  * class or resource to its parent class loader before attempting to find the
  * class or resource itself.
  *
  * <p> Class loaders that support concurrent loading of classes are known as
- * <em>parallel capable</em> class loaders and are required to register
- * themselves at their class initialization time by invoking the
- * {@link
+ * <em>{@linkplain #isParallelCapable() parallel capable}</em> class loaders and
+ * are required to register themselves at their class initialization time by
+ * invoking the {@link
  * #registerAsParallelCapable <tt>ClassLoader.registerAsParallelCapable</tt>}
  * method. Note that the <tt>ClassLoader</tt> class is registered as parallel
  * capable by default. However, its subclasses still need to register themselves
  * if they are parallel capable.
  * In environments in which the delegation model is not strictly

@@ -1441,11 +1441,11 @@
     protected Enumeration<URL> findResources(String name) throws IOException {
         return java.util.Collections.emptyEnumeration();
     }
 
     /**
-     * Registers the caller as parallel capable.
+     * Registers the caller as {@linkplain #isParallelCapable() parallel capable}.
      * The registration succeeds if and only if all of the following
      * conditions are met:
      * <ol>
      * <li> no instance of the caller has been created</li>
      * <li> all of the super classes (except class Object) of the caller are

@@ -1455,20 +1455,38 @@
      * is no way to change it back.</p>
      *
      * @return  true if the caller is successfully registered as
      *          parallel capable and false if otherwise.
      *
+     * @see #isParallelCapable()
+     * 
      * @since   1.7
      */
     @CallerSensitive
     protected static boolean registerAsParallelCapable() {
         Class<? extends ClassLoader> callerClass =
             Reflection.getCallerClass().asSubclass(ClassLoader.class);
         return ParallelLoaders.register(callerClass);
     }
 
     /**
+     * Returns {@code true} if this class loader is
+     * {@linkplain #registerAsParallelCapable parallel capable}, otherwise
+     * {@code false}.
+     *
+     * @return  {@code true} if this class loader is parallel capable,
+     *          otherwise {@code false}.
+     *
+     * @see #registerAsParallelCapable()
+     *
+     * @since   9
+     */
+    public final boolean isParallelCapable() {
+        return ParallelLoaders.isRegistered(this.getClass());
+    }
+
+    /**
      * Find a resource of the specified name from the search path used to load
      * classes.  This method locates the resource through the system class
      * loader (see {@link #getSystemClassLoader()}).
      *
      * Resources in a named module are private to that module. This method does