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 }