Quelle BlankLines.java Sprache: JAVA

/*
* Copyright (c) 2018, 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 4218776
* @summary Test loading of properties files with blank lines
*/

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

/**
* This class tests to see if a properties object correctly handles blank
* lines in a properties file
*/
public class BlankLines {
    public static void main(String []args)
    {
        try {
            // create test file
            File file = new File("test.properties");

            // write a single space to the test file
            FileOutputStream fos = new FileOutputStream(file);
            fos.write(' ');
            fos.close();

            // test empty properties
            Properties prop1 = new Properties();

            // now load the file we just created, into a
            // properties object.
            // the properties object should have no elements,
            // but due to a bug, it has an empty key/value.
            // key = "", value = ""
            Properties prop2 = new Properties();
            InputStream is = new FileInputStream(file);
            try {
                prop2.load(is);
            } finally {
                is.close();
            }
            if (!prop1.equals(prop2))
                throw new RuntimeException("Incorrect properties loading.");

            // cleanup
            file.delete();
        }
        catch(IOException e) {}
    }
}

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