8310814: Clarify the targetName parameter of Lookup::findClass

src/java.base/share/classes/java/lang/invoke/MethodHandles.java

@@ -2844,10 +2844,16 @@ public MethodHandle findConstructor(Class<?> refc, MethodType type) throws NoSuc
          * Such a resolution, as specified in JVMS {@jvms 5.4.3.1}, attempts to locate and load the class,
          * and then determines whether the class is accessible to this lookup object.
          * <p>
+         * For a class or an interface, the name is the {@linkplain ClassLoader##binary-name binary name}.
+         * For an array class of {@code n} dimensions, the name begins with {@code n} occurrences
+         * of {@code '['} and followed by the element type as encoded in the
+         * {@linkplain Class##nameFormat table} specified in {@link Class#getName}.
+         * <p>
          * The lookup context here is determined by the {@linkplain #lookupClass() lookup class},
          * its class loader, and the {@linkplain #lookupModes() lookup modes}.
          *
-         * @param targetName the fully qualified name of the class to be looked up.
+         * @param targetName the {@linkplain ClassLoader##binary-name binary name} of the class
+         *                   or the string representing an array class
          * @return the requested class.
          * @throws SecurityException if a security manager is present and it
          *                           <a href="MethodHandles.Lookup.html#secmgr">refuses access</a>