/*
* 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;
import libcore.util.EmptyArray;
/**
* Placeholder class for the Java keyword {@code void}.
*
* @since 1.1
*/
public final class Void {
/**
* The {@link Class} object that represents the primitive type {@code void}.
*/
public static final Class<Void> TYPE = lookupType();
// Note: Void.TYPE can't be set to "void.class", since *that* is
// defined to be "java.lang.Void.TYPE";
@SuppressWarnings("unchecked")
private static Class<Void> lookupType() {
try {
Method method = Runnable.class.getMethod("run", EmptyArray.CLASS);
return (Class<Void>) method.getReturnType();
} catch (Exception e) {
throw new AssertionError(e);
}
}
private Void() {
}
}