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 */ 30import java.math.BigInteger; 31 32public class DoubleValueOverflow { 33 34 public static void main(String[] args) { 35 try { 36 BigInteger x = BigInteger.valueOf(2).shiftLeft(Integer.MAX_VALUE); // x = pow(2,pow(2,31)) 37 if (x.doubleValue() != Double.POSITIVE_INFINITY) { 38 throw new RuntimeException("Incorrect doubleValue() " + x.doubleValue()); 39 } 40 System.out.println("Passed with correct result"); 41 } catch (ArithmeticException e) { 42 // expected 43 System.out.println("Overflow is reported by ArithmeticException, as expected"); 44 } catch (OutOfMemoryError e) { 45 // possible 46 System.err.println("DoubleValueOverflow skipped: OutOfMemoryError"); 47 System.err.println("Run jtreg with -javaoption:-Xmx8g"); 48 } 49 } 50} 51