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1 /* |
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2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 /* |
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25 * @test |
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26 * @bug 8025657 |
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27 * @summary Test repeating addExact |
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28 * @compile RepeatTest.java |
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29 * @run main RepeatTest |
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30 * |
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31 */ |
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32 |
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33 import java.lang.ArithmeticException; |
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34 |
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35 public class RepeatTest { |
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36 public static void main(String[] args) { |
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37 java.util.Random rnd = new java.util.Random(); |
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38 for (int i = 0; i < 50000; ++i) { |
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39 int x = Integer.MAX_VALUE - 10; |
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40 int y = Integer.MAX_VALUE - 10 + rnd.nextInt(5); //rnd.nextInt() / 2; |
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41 |
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42 int c = rnd.nextInt() / 2; |
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43 int d = rnd.nextInt() / 2; |
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44 |
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45 int a = addExact(x, y); |
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46 |
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47 if (a != 36) { |
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48 throw new RuntimeException("a != 0 : " + a); |
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49 } |
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50 |
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51 int b = nonExact(c, d); |
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52 int n = addExact2(c, d); |
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53 |
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54 |
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55 if (n != b) { |
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56 throw new RuntimeException("n != b : " + n + " != " + b); |
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57 } |
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58 } |
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59 } |
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60 |
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61 public static int addExact2(int x, int y) { |
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62 int result = 0; |
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63 result += java.lang.Math.addExact(x, y); |
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64 result += java.lang.Math.addExact(x, y); |
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65 result += java.lang.Math.addExact(x, y); |
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66 result += java.lang.Math.addExact(x, y); |
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67 return result; |
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68 } |
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69 |
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70 public static int addExact(int x, int y) { |
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71 int result = 0; |
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72 try { |
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73 result += 5; |
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74 result = java.lang.Math.addExact(x, y); |
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75 } catch (ArithmeticException e) { |
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76 result += 1; |
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77 } |
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78 try { |
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79 result += 6; |
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80 |
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81 result += java.lang.Math.addExact(x, y); |
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82 } catch (ArithmeticException e) { |
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83 result += 2; |
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84 } |
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85 try { |
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86 result += 7; |
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87 result += java.lang.Math.addExact(x, y); |
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88 } catch (ArithmeticException e) { |
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89 result += 3; |
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90 } |
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91 try { |
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92 result += 8; |
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93 result += java.lang.Math.addExact(x, y); |
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94 } catch (ArithmeticException e) { |
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95 result += 4; |
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96 } |
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97 return result; |
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98 } |
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99 |
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100 public static int nonExact(int x, int y) { |
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101 int result = x + y; |
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102 result += x + y; |
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103 result += x + y; |
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104 result += x + y; |
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105 return result; |
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106 } |
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107 } |