| /* |
| * Copyright (c) 2002, 2010, 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 4698375 |
| * @summary generics: subtyping problem when type parameters permuted |
| * @author gafter |
| * |
| * @compile PermuteBound.java |
| */ |
| |
| package PermuteBound; |
| |
| class C<X, Y> {} |
| |
| class D<X, Y> extends C<X, Y> |
| { |
| void f(C<X, Y> c) |
| { |
| D<X, Y> d = (D<X, Y>) c;// OK because D extends C |
| } |
| |
| void g(C<Y, X> c)// parameters X and Y are now permuted |
| { |
| D<Y, X> d = (D<Y, X>) c;// should also be OK but is not !? |
| // ^ |
| // inconvertible types |
| // found : C<Y,X> |
| // required : D<Y,X> |
| } |
| /* |
| void gWorkAround(C<Y, X> c)// but generates unchecked warning |
| { |
| D<Y, X> d = (D) ((C) c); |
| } |
| */ |
| } |