1 /*

     2  * Copyright (c) 2003, 2016, 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 4944439

    27  * @summary Confirm that numbers where all digits after the decimal separator are 0

    28  * and which are between Long.MIN_VALUE and Long.MAX_VALUE are returned as Long(not double).

    29  */

    30 

    31 import java.math.BigDecimal;

    32 import java.math.BigInteger;

    33 import java.text.DecimalFormat;

    34 import java.util.Locale;

    35 

    36 public class Bug4944439 {

    37 

    38     static boolean err = false;

    39     static DecimalFormat df;

    40 

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

    42 

    43         Locale defaultLoc = Locale.getDefault();

    44         Locale.setDefault(Locale.US);

    45 

    46         df = new DecimalFormat();

    47         String s = "-9223372036854775809";      // Long.MIN_VALUE-1

    48         check_Double(s);

    49 

    50         test(Long.MIN_VALUE, Long.MIN_VALUE+10);

    51         test(-10, 10);

    52         test(Long.MAX_VALUE-10, Long.MAX_VALUE-1);

    53 

    54         s = "9223372036854775807.00";   // Long.MAX_VALUE

    55         check_Long(s);

    56         s = "9223372036854775808";      // Long.MAX_VALUE+1

    57         check_Double(s);

    58 

    59         s = "-0.0";

    60         check_Double(s);

    61         s = "0.0";

    62         check_Long(s);

    63 

    64         Locale.setDefault(defaultLoc);

    65 

    66         if (err) {

    67             throw new RuntimeException("Wrong parsing with DecimalFormat");

    68         }

    69     }

    70 

    71     private static void test(long from, long to) throws Exception {

    72         for (long l = from; l <= to; l++) {

    73             check_Long(Long.toString(l) + ".00");

    74         }

    75     }

    76 

    77     private static void check_Long(String s) throws Exception {

    78         Number number = df.parse(s);

    79         if (!(number instanceof Long)) {

    80             err = true;

    81             System.err.println("Failed: DecimalFormat.parse(\"" + s +

    82                 "\") should return a Long, but returned a " +

    83                 number.getClass().getName());

    84         }

    85 

    86         int index = s.indexOf('.');

    87         Long l = new Long(s.substring(0, index));

    88         if (!l.equals(number)) {

    89             err = true;

    90             System.err.println("Failed: DecimalFormat.parse(" + s +

    91                 ") should return a Long(" + l + "), but returned " + number);

    92         }

    93     }

    94 

    95     private static void check_Double(String s) throws Exception {

    96         Number number = df.parse(s);

    97         if (!(number instanceof Double)) {

    98             err = true;

    99             System.err.println("Failed: DecimalFormat.parse(\"" + s +

   100                 "\") should return a Double, but returned a " +

   101                 number.getClass().getName());

   102         }

   103 

   104         Double d = new Double(s);

   105         if (!d.equals(number)) {

   106             err = true;

   107             System.err.println("Failed: DecimalFormat.parse(" + s +

   108                 ") should return a Double(" + d + "), but returned " + number);

   109         }

   110     }

   111 }