73 lines
2.4 KiB
Java
73 lines
2.4 KiB
Java
/*
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* Copyright (c) 2004, 2023, 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 4990596
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* @summary Make sure that any subclass of Number can be formatted using
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* DecimalFormat.format() without throwing an exception.
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* @run junit Bug4990596
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*/
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import java.text.DecimalFormat;
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import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
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public class Bug4990596 {
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// Test that a custom subclass of Number can be formatted by
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// DecimalFormat without throwing an IllegalArgumentException
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@Test
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public void formatSubclassedNumberTest() {
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assertDoesNotThrow(() -> new DecimalFormat().format(new MutableInteger(0)),
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"DecimalFormat.format() should support subclasses of Number");
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}
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// A custom subclass of Number. Prior to this fix, if an instance of this
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// class was formatted by DecimalFormat, an exception would be thrown.
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@SuppressWarnings("serial")
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public static class MutableInteger extends Number {
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public int value;
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public MutableInteger() {
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}
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public MutableInteger(int value) {
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this.value = value;
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}
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public double doubleValue() {
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return this.value;
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}
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public float floatValue() {
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return this.value;
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}
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public int intValue() {
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return this.value;
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}
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public long longValue() {
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return this.value;
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}
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}
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}
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