1 /*
 2  * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 /*
25  * @test
26  * @bug 8282107
27  * @summary Check that javac can compile against value classes at lower source levels
28  * @compile GenericPoint.java
29  * @compile --source 16 ConsumeValueClassAtLowerLevel.java
30  * @run main ConsumeValueClassAtLowerLevel
31  */
32 
33 public class ConsumeValueClassAtLowerLevel {
34     public static void main(String [] args) {
35 
36         /* Attempting to instantiate a value/primitive class in earlier source level should
37          * result in an InstantiationError since javac's class reader downgrades
38          * the value class to an identity class if current source level does not
39          * support value/primitive class. And so rather than invoke the factory method,
40          * the source code of earlier vintage would attempt to invoke the constructor
41          * and so should crash and burn with an InstantiationError.
42          *
43          * This behavior is subject to change - see JDK-8282525
44          */
45         boolean gotIE = false;
46         try {
47             GenericPoint<Integer> gl = new GenericPoint<>(0, 0);
48         } catch (java.lang.InstantiationError ie) {
49             gotIE = true;
50         }
51         if (!gotIE) {
52             throw new AssertionError("Did not see instantiation error!");
53         }
54     }
55 }