9e7ba92bff
8021203: BigInteger.doubleValue/floatValue returns 0.0 instead of Infinity 8021204: Constructor BigInteger(String val, int radix) doesn't detect overflow 8022780: Incorrect BigInteger division because of MutableBigInteger.bitLength() overflow Prevent construction of overflowed BigIntegers. Reviewed-by: bpb, darcy, psandoz
50 lines
1.9 KiB
Java
50 lines
1.9 KiB
Java
/*
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* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @ test
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* @bug 8021203
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* @summary Test that doubleValue() doesn't overflow
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* @author Dmitry Nadezhin
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*/
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import java.math.BigInteger;
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public class DoubleValueOverflow {
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public static void main(String[] args) {
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try {
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BigInteger x = BigInteger.valueOf(2).shiftLeft(Integer.MAX_VALUE); // x = pow(2,pow(2,31))
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if (x.doubleValue() != Double.POSITIVE_INFINITY)
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throw new RuntimeException("Incorrect doubleValue() " + x.doubleValue());
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System.out.println("Passed with correct result");
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} catch (ArithmeticException e) {
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// expected
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System.out.println("Overflow is reported by ArithmeticException, as expected");
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} catch (OutOfMemoryError e) {
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// possible
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System.out.println("OutOfMemoryError");
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}
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}
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}
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