AnonymousSubclassTest.java revision 3314:97ec97671022 
1/*
2 * Copyright (c) 2014, 2016, 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 8023945
27 * @summary javac wrongly allows a subclass of an anonymous class
28 * @library /tools/lib
29 * @modules jdk.compiler/com.sun.tools.javac.api
30 *          jdk.compiler/com.sun.tools.javac.main
31 * @build toolbox.ToolBox toolbox.JavacTask
32 * @run main AnonymousSubclassTest
33 */
34
35import toolbox.JavacTask;
36import toolbox.Task;
37import toolbox.ToolBox;
38
39public class AnonymousSubclassTest {
40    public static void main(String... args) throws Exception {
41        new AnonymousSubclassTest().run();
42    }
43
44    ToolBox tb = new ToolBox();
45
46    // To trigger the error we want, first we need to compile
47    // a class with an anonymous inner class: Foo$1.
48    final String foo =
49        "public class Foo {" +
50        "  void m() { Foo f = new Foo() {}; }" +
51        "}";
52
53    // Then, we try to subclass the anonymous class
54    // Note: we must do this in two classes because a different
55    // error will be generated if we don't load Foo$1 through the
56    // class reader.
57    final String test1 =
58        "public class Test1 {" +
59        "  void m() {"+
60        "    Foo f1 = new Foo();"+
61        "    Foo f2 = new Foo$1(f1) {};"+
62        "  }" +
63        "}";
64
65    final String test2 =
66        "public class Test2 {" +
67        "  class T extends Foo$1 {" +
68        "    public T(Foo f) { super(f); }" +
69        "  }"+
70        "}";
71
72    void compOk(String code) throws Exception {
73        new JavacTask(tb)
74                .sources(code)
75                .run();
76    }
77
78    void compFail(String code) throws Exception {
79        String errs = new JavacTask(tb)
80                .sources(code)
81                .classpath(".")
82                .options("-XDrawDiagnostics")
83                .run(Task.Expect.FAIL)
84                .writeAll()
85                .getOutput(Task.OutputKind.DIRECT);
86
87        if (!errs.contains("cant.inherit.from.anon")) {
88            throw new Exception("test failed");
89        }
90    }
91
92    void run() throws Exception {
93        compOk(foo);
94        compFail(test1);
95        compFail(test2);
96    }
97}
98