test/hotspot/jtreg/runtime/appcds/test-classes/HelloExt.java

/*
 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

import sun.hotspot.WhiteBox;

public class HelloExt {
   public static void main(String[] args) throws Throwable {

       String className = "javax.annotation.processing.FilerException";
       Class cls = Class.forName(className);

       ClassLoader loader = cls.getClassLoader();
       if (loader != ClassLoader.getPlatformClassLoader()) {
           throw new java.lang.RuntimeException(className + " should be load by PlatformClassLoader but it is loaded by " + loader);
       }

       WhiteBox wb = WhiteBox.getWhiteBox();
       if (wb.isSharedClass(cls)) {
           System.out.println("As expected, " + className + " is in shared space.");
       } else {
           throw new java.lang.RuntimeException(className + " is not in shared space.");
       }

       className = "[Ljava.lang.Comparable;";
       cls = Class.forName(className);
       loader = cls.getClassLoader();
       if (loader != null) {
           throw new java.lang.RuntimeException(className + " should be load by the NULL class loader but it is loaded by " + loader);
       }

       if (wb.isSharedClass(cls)) {
           System.out.println("As expected, " + className + " is in shared space.");
       } else {
           throw new java.lang.RuntimeException(className + " is not in shared space.");
       }
   }
}