61 lines
2.4 KiB
Java
61 lines
2.4 KiB
Java
/*
|
|
* Copyright (c) 2015, 2021, 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 java.lang.*;
|
|
|
|
import java.lang.reflect.Method;
|
|
import jdk.internal.access.JavaLangAccess;
|
|
import jdk.internal.access.SharedSecrets;
|
|
|
|
class EmptyClassHelper {
|
|
static final JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
|
|
static final String USE_APP = "useAppLoader";
|
|
public static void main(String[] args) throws Exception {
|
|
Class cls = null;
|
|
Method m = null;
|
|
ClassLoader appLoader = ClassLoader.getSystemClassLoader();
|
|
String className = "com.sun.tools.javac.Main";
|
|
if (args[0].equals(USE_APP)) {
|
|
cls = appLoader.loadClass(className);
|
|
System.out.println("appLoader loaded class");
|
|
try {
|
|
m = cls.getMethod("main", String[].class);
|
|
System.out.println("appLoader found method main");
|
|
} catch(NoSuchMethodException ex) {
|
|
System.out.println(ex.toString());
|
|
}
|
|
} else {
|
|
cls = jla.findBootstrapClassOrNull(className);
|
|
System.out.println("bootLoader loaded class");
|
|
System.out.println("cls = " + cls);
|
|
try {
|
|
m = cls.getMethod("main", String[].class);
|
|
System.out.println("bootLoader found method main");
|
|
} catch(NoSuchMethodException ex) {
|
|
System.out.println(ex.toString());
|
|
}
|
|
}
|
|
}
|
|
}
|