1 /*
   2  * Copyright (c) 2015, 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  * @summary Test that StringConcat is working for JDK >= 9
  27  * @compile -source 6 -target 6 TestIndyStringConcat.java
  28  * @run main TestIndyStringConcat false
  29  * @clean TestIndyStringConcat*
  30  * @compile -source 7 -target 7 TestIndyStringConcat.java
  31  * @run main TestIndyStringConcat false
  32  * @clean TestIndyStringConcat*
  33  * @compile -source 8 -target 8 TestIndyStringConcat.java
  34  * @run main TestIndyStringConcat false
  35  * @clean TestIndyStringConcat*
  36  * @compile -XDstringConcat=inline -source 9 -target 9 TestIndyStringConcat.java
  37  * @run main TestIndyStringConcat false
  38  * @clean TestIndyStringConcat*
  39  * @compile -XDstringConcat=indy -source 9 -target 9 TestIndyStringConcat.java
  40  * @run main TestIndyStringConcat true
  41  * @clean TestIndyStringConcat*
  42  * @compile -XDstringConcat=indyWithConstants -source 9 -target 9 TestIndyStringConcat.java
  43  * @run main TestIndyStringConcat true
  44  */
  45 public class TestIndyStringConcat {
  46 
  47     private static class MyObject {
  48         public String toString() {
  49             throw new RuntimeException("Boyyaa");
  50         }
  51     }
  52 
  53     class Inner { }
  54 
  55     public static void main(String[] args) {
  56         boolean useIndyConcat = Boolean.valueOf(args[0]);
  57         try {
  58             String s = "Foo" + new MyObject();
  59         } catch (RuntimeException ex) {
  60             boolean indifiedStringConcat = false;
  61             ex.printStackTrace();
  62             for (StackTraceElement e : ex.getStackTrace()) {
  63                 if (e.getClassName().startsWith("java.lang.String$Concat") &&
  64                         e.getMethodName().equals("concat")) {
  65                     indifiedStringConcat = true;
  66                     break;
  67                 }
  68             }
  69             if (indifiedStringConcat != useIndyConcat) {
  70                 throw new AssertionError();
  71             }
  72         }
  73     }
  74 }