1 /*

     2  * Copyright (c) 2005, 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  * @bug  4491255

    27  * @summary Test for a new protected method PrintStream.clearError()

    28  *      to reset the internal error state

    29  */

    30 

    31 import java.io.*;

    32 

    33 public class ClearErrorStream extends PrintStream {

    34 

    35    public ClearErrorStream(OutputStream out, boolean autoFlush) {

    36         super(out, autoFlush);

    37    }

    38 

    39     public static void main(String[] args) throws Exception {

    40 

    41         File f = new File(System.getProperty("test.dir", "."),

    42                           "print-stream.out");

    43         f.deleteOnExit();

    44 

    45         ClearErrorStream out = new ClearErrorStream(

    46                                 new BufferedOutputStream(

    47                                 new FileOutputStream(f)),

    48                                 true);

    49         out.println("Hello World!");

    50         out.close();

    51         out.println("Writing after close");

    52 

    53         if (out.checkError()) {

    54             System.out.println("An error occured");

    55             out.clearError();

    56 

    57             if (!out.checkError()) {

    58                 System.out.println("Error status cleared");

    59             } else {

    60                 throw new Exception("Error Status unchanged");

    61             }

    62          }

    63          else {

    64              System.out.println(" No error occured");

    65          }

    66     }

    67 }