openjdk源码
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/*
* Copyright (c) 1998, 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.
*/
/*
* @test
* @bug 4157921
* @summary Test subclasses of BasicPermission to make sure different
* subclasses don't equal or imply each other.
*/
import java.security.Permission;
import java.security.BasicPermission;
class A extends BasicPermission {
public A(String name) { super(name); }
}
class B extends BasicPermission {
public B(String name) { super(name); }
}
public class EqualsImplies {
public static void main(String[]args) throws Exception {
Permission p1 = new A("foo");
Permission p2 = new B("foo");
if (p1.implies(p2) || p2.implies(p1) || p1.equals(p2)) {
throw new Exception("Test failed");
}
// make sure permissions imply and equal themselves
if (! (p1.implies(p1) && p1.equals(p1))) {
throw new Exception("Test failed");
}
}
}