1 /*
 2  * Copyright (c) 2022, 2024, 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 8293134
27  * @summary Test that a super abstract value class is allowed.
28  * @enablePreview
29  * @run main AbstractValueClassTest
30  */
31 
32 public class AbstractValueClassTest {
33 
34     public static void main(String[] args) {
35         A a = new A();
36         a.doit(a);
37     }
38     public static abstract value class T {
39         public abstract void doit(T t);
40     }
41 
42     public static final value class A extends T {
43         public void doit(T t) {
44             System.out.println(t);
45         }
46     }
47     public static final value class B extends T {
48         public void doit(T t) {
49             System.out.println(t);
50         }
51     }
52 }