io/Reader/NullLock.java

/*
 * 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 4152455
   @summary A null lock in the create must throw an exception
*/


import java.io.*;

public class NullLock {
    public static void main(String argv[]) throws Exception {
        if (!testBufferedReader())
            throw new Exception("Buffered Reader constructor: "
                                + "Null argument must throw an exception");
        if (!testBufferedWriter())
            throw new Exception("BufferedWriter constructor: "
                                + " Null arg must throw an exception");
    }

    static boolean testBufferedReader(){
        try {
            InputStreamReader isr = null;
            BufferedReader br = new BufferedReader(isr);
        } catch(NullPointerException e) {
            return true;
        }
        return false;
    }

    static boolean testBufferedWriter(){
        try {
            OutputStreamWriter isr = null;
            BufferedWriter br = new BufferedWriter(isr);
        } catch(NullPointerException e) {
            return true;
        }
        return false;
    }

}