1 /* 2 * Copyright (c) 2013, 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 8025657 27 * @summary Test repeating addExact 28 * @compile RepeatTest.java 29 * @run main RepeatTest 30 * 31 */ 32 33 import java.lang.ArithmeticException; 34 35 public class RepeatTest { 36 public static void main(String[] args) { 37 java.util.Random rnd = new java.util.Random(); 38 for (int i = 0; i < 50000; ++i) { 39 int x = Integer.MAX_VALUE - 10; 40 int y = Integer.MAX_VALUE - 10 + rnd.nextInt(5); //rnd.nextInt() / 2; 41 42 int c = rnd.nextInt() / 2; 43 int d = rnd.nextInt() / 2; 44 45 int a = addExact(x, y); 46 47 if (a != 36) { 48 throw new RuntimeException("a != 0 : " + a); 49 } 50 51 int b = nonExact(c, d); 52 int n = addExact2(c, d); 53 54 55 if (n != b) { 56 throw new RuntimeException("n != b : " + n + " != " + b); 57 } 58 } 59 } 60 61 public static int addExact2(int x, int y) { 62 int result = 0; 63 result += java.lang.Math.addExact(x, y); 64 result += java.lang.Math.addExact(x, y); 65 result += java.lang.Math.addExact(x, y); 66 result += java.lang.Math.addExact(x, y); 67 return result; 68 } 69 70 public static int addExact(int x, int y) { 71 int result = 0; 72 try { 73 result += 5; 74 result = java.lang.Math.addExact(x, y); 75 } catch (ArithmeticException e) { 76 result += 1; 77 } 78 try { 79 result += 6; 80 81 result += java.lang.Math.addExact(x, y); 82 } catch (ArithmeticException e) { 83 result += 2; 84 } 85 try { 86 result += 7; 87 result += java.lang.Math.addExact(x, y); 88 } catch (ArithmeticException e) { 89 result += 3; 90 } 91 try { 92 result += 8; 93 result += java.lang.Math.addExact(x, y); 94 } catch (ArithmeticException e) { 95 result += 4; 96 } 97 return result; 98 } 99 100 public static int nonExact(int x, int y) { 101 int result = x + y; 102 result += x + y; 103 result += x + y; 104 result += x + y; 105 return result; 106 } 107 }