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 8021203 27 * @summary Test that doubleValue() doesn't overflow 28 * @author Dmitry Nadezhin 29 */ 30 package test.java.math.BigInteger; 31 32 import java.math.BigInteger; 33 34 public class DoubleValueOverflow { 35 main(String[] args)36 public static void main(String[] args) { 37 try { 38 BigInteger x = BigInteger.valueOf(2).shiftLeft(Integer.MAX_VALUE); // x = pow(2,pow(2,31)) 39 if (x.doubleValue() != Double.POSITIVE_INFINITY) { 40 throw new RuntimeException("Incorrect doubleValue() " + x.doubleValue()); 41 } 42 System.out.println("Passed with correct result"); 43 } catch (ArithmeticException e) { 44 // expected 45 System.out.println("Overflow is reported by ArithmeticException, as expected"); 46 } catch (OutOfMemoryError e) { 47 // possible 48 System.err.println("DoubleValueOverflow skipped: OutOfMemoryError"); 49 System.err.println("Run jtreg with -javaoption:-Xmx8g"); 50 } 51 } 52 } 53