1 /*

     2  * Copyright (c) 2013, 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 Check usages of underscore as identifier generate warnings

    27  * @compile/fail/ref=WarnUnderscoreAsIdent.out -XDrawDiagnostics -Werror WarnUnderscoreAsIdent.java

    28  */

    29 package _._;

    30 

    31 import _._;

    32 

    33 class _ {

    34     String _ = null;

    35     void _(String _) { }

    36     void testLocal() {

    37         String _ = null;

    38     }

    39     void testFor() {

    40         for (int _ = 0; _ < 10; _++);

    41     }

    42     void testTry() {

    43         try { } catch (Throwable _) { }

    44     }

    45     void testLabel() {

    46         _:

    47         for (;;) {

    48             break _;

    49         }

    50         _:

    51         for (;;) {

    52             continue _;

    53         }

    54     }

    55 }