| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package java.lang; |
| |
| import java.lang.reflect.Method; |
| |
| /** |
| * Placeholder class for the Java keyword {@code void}. |
| * |
| * @since 1.1 |
| */ |
| public final class Void extends Object { |
| |
| /** |
| * The {@link Class} object that represents the primitive type {@code void}. |
| */ |
| public static final Class<Void> TYPE = lookupType(); |
| |
| // Note: This can't be set to "void.class", since *that* is |
| // defined to be "java.lang.Void.TYPE"; |
| |
| @SuppressWarnings("unchecked") |
| private static Class<Void> lookupType() { |
| Class<?> voidType = null; |
| try { |
| Method method = Runnable.class.getMethod("run", new Class[0]); //$NON-NLS-1$ |
| voidType = method.getReturnType(); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| return (Class<Void>) voidType; |
| } |
| |
| private Void() { |
| } |
| } |