1 /*
 2  * Copyright (c) 2008, 2025, 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 id=zeroClass
26  * @bug 4870651 6715757
27  * @summary javap should recognize generics, varargs, enum;
28  *          javap prints "extends java.lang.Object"
29  * @modules jdk.jdeps/com.sun.tools.javap
30  * @compile Test.java
31  * @run main/othervm -DpreviewClass=false T4870651
32  * @comment runtime in preview or not should not affect javac/javap behavior
33  */
34 
35 /*
36  * @test id=previewClass
37  * @bug 4870651 6715757
38  * @summary javap should recognize generics, varargs, enum;
39  *          javap prints "extends java.lang.Object"
40  * @modules jdk.jdeps/com.sun.tools.javap
41  * @compile --enable-preview -source ${jdk.version} -XDforcePreview Test.java
42  * @run main/othervm -DpreviewClass=true T4870651
43  * @comment runtime in preview or not should not affect javac/javap behavior
44  */
45 
46 import java.io.*;
47 
48 public class T4870651 {
49     public static void main(String[] args) throws Exception {
50         new T4870651().run();
51     }
52 
53     public void run() throws IOException {
54         verify("Test",
55                "class Test<T extends java.lang.Object, " +
56                    "E extends java.lang.Exception & java.lang.Comparable<T>, " +
57                    "U extends java.lang.Comparable>",
58                "v1(java.lang.String...)");
59 
60         verify("Test$Enum",
61                Boolean.getBoolean("previewClass") // .65535 instead of .0
62                        ? "flags: (0x4030) ACC_FINAL, ACC_IDENTITY, ACC_ENUM"
63                        : "flags: (0x4030) ACC_FINAL, ACC_SUPER, ACC_ENUM",
64                "flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ENUM");
65 
66         if (errors > 0)
67             throw new Error(errors + " found.");
68     }
69 
70     String javap(String className) {
71         String testClasses = System.getProperty("test.classes", ".");
72         StringWriter sw = new StringWriter();
73         PrintWriter out = new PrintWriter(sw);
74         String[] args = { "-classpath", testClasses, "-v", className };
75         int rc = com.sun.tools.javap.Main.run(args, out);
76         if (rc != 0)
77             throw new Error("javap failed. rc=" + rc);
78         out.close();
79         String output = sw.toString();
80         System.out.println("class " + className);
81         System.out.println(output);
82         return output;
83     }
84 
85     void verify(String className, String... expects) {
86         String output = javap(className);
87         for (String expect: expects) {
88             if (output.indexOf(expect)< 0)
89                 error(expect + " not found");
90         }
91     }
92 
93     void error(String msg) {
94         System.err.println(msg);
95         errors++;
96     }
97 
98     int errors;
99 }