/*
* Copyright ( c ) 1998 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
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* questions .
*/
/* @test
@ bug 4096278
@ summary Math . abs ( + 0 . 0 ) wrong
@ author Anand Palaniswamy
*/
public class AbsPositiveZero {
private static boolean isPositiveZero(float f) {
return Float .floatToIntBits(f) == Float .floatToIntBits(0 .0 f);
}
private static boolean isPositiveZero(double d) {
return Double .doubleToLongBits(d) == Double .doubleToLongBits(0 .0 d);
}
public static void main(String[] args) throws Exception {
if (!isPositiveZero(Math.abs(-0 .0 d))) {
throw new Exception("abs(-0.0d) failed" );
}
if (!isPositiveZero(Math.abs(+0 .0 d))) {
throw new Exception("abs(+0.0d) failed" );
}
if (Math.abs(Double .POSITIVE_INFINITY) != Double .POSITIVE_INFINITY) {
throw new Exception("abs(+Inf) failed" );
}
if (Math.abs(Double .NEGATIVE_INFINITY) != Double .POSITIVE_INFINITY) {
throw new Exception("abs(-Inf) failed" );
}
double dnanval = Math.abs(Double .NaN);
if (dnanval == dnanval) {
throw new Exception("abs(NaN) failed" );
}
if (!isPositiveZero(Math.abs(-0 .0 f))) {
throw new Exception("abs(-0.0f) failed" );
}
if (!isPositiveZero(Math.abs(+0 .0 f))) {
throw new Exception("abs(+0.0f) failed" );
}
if (Math.abs(Float .POSITIVE_INFINITY) != Float .POSITIVE_INFINITY) {
throw new Exception("abs(+Inf) failed" );
}
if (Math.abs(Float .NEGATIVE_INFINITY) != Float .POSITIVE_INFINITY) {
throw new Exception("abs(-Inf) failed" );
}
float fnanval = Math.abs(Float .NaN);
if (fnanval == fnanval) {
throw new Exception("abs(NaN) failed" );
}
}
}
Messung V0.5 in Prozent C=98 H=97 G=97
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-09-29)
¤
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