124 lines
5.0 KiB
Java
124 lines
5.0 KiB
Java
/*
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* Copyright (c) 1998, 2007, 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 4143272 6548425
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* @summary The natural ordering on Float and Double was not even a partial
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* order (i.e., it violated the contract of Comparable.compareTo).
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* Now it's a total ordering. Arrays.sort(double[])
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* and Arrays.sort(double[]) reflect the new ordering. Also,
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* Arrays.equals(double[], double[]) and
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* Arrays.equals(float[], float[]) reflect the definition of
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* equality used by Float and Double.
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*/
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import java.util.*;
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@SuppressWarnings("unchecked")
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public class FloatDoubleOrder {
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void test(String[] args) throws Throwable {
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double[] unsortedDbl = new double[] {1.0d, 3.7d, Double.NaN, -2.0d,
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Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY, 0.0d, -0.0d};
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double[] sortedDbl = new double[] {Double.NEGATIVE_INFINITY, -2.0d,
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-0.0d, 0.0d, 1.0d, 3.7d, Double.POSITIVE_INFINITY, Double.NaN};
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List list = new ArrayList();
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for (int i=0; i<unsortedDbl.length; i++)
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list.add(new Double(unsortedDbl[i]));
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Collections.sort(list);
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List sortedList = new ArrayList();
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for (int i=0; i<sortedDbl.length; i++)
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sortedList.add(new Double(sortedDbl[i]));
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check(list.equals(sortedList));
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Arrays.sort(unsortedDbl);
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check(Arrays.equals(unsortedDbl, sortedDbl));
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double negNan = Double.longBitsToDouble(0xfff8000000000000L);
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for (int i = 0; i < sortedDbl.length; i++) {
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equal(Arrays.binarySearch(sortedDbl, sortedDbl[i]), i);
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if (Double.isNaN(sortedDbl[i]))
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equal(Arrays.binarySearch(sortedDbl, negNan), i);
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}
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float[] unsortedFlt = new float[] {1.0f, 3.7f, Float.NaN, -2.0f,
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Float.POSITIVE_INFINITY, Float.NEGATIVE_INFINITY, 0.0f, -0.0f};
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float[] sortedFlt = new float[] {Float.NEGATIVE_INFINITY, -2.0f,
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-0.0f, 0.0f, 1.0f, 3.7f, Float.POSITIVE_INFINITY, Float.NaN};
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list.clear();
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for (int i=0; i<unsortedFlt.length; i++)
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list.add(new Float(unsortedFlt[i]));
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Collections.sort(list);
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sortedList.clear();
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for (int i=0; i<sortedFlt.length; i++)
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sortedList.add(new Float(sortedFlt[i]));
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check(list.equals(sortedList));
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Arrays.sort(unsortedFlt);
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check(Arrays.equals(unsortedFlt, sortedFlt));
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float negNaN = Float.intBitsToFloat(0xFfc00000);
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for (int i = 0; i < sortedDbl.length; i++) {
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equal(Arrays.binarySearch(sortedFlt, sortedFlt[i]), i);
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if (Float.isNaN(sortedFlt[i]))
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equal(Arrays.binarySearch(sortedFlt, negNaN), i);
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}
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// 6548425: Arrays.sort incorrectly sorts a double array
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// containing negative zeros
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double[] da = {-0.0d, -0.0d, 0.0d, -0.0d};
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Arrays.sort(da, 1, 4);
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check(Arrays.equals(da, new double[] {-0.0d, -0.0d, -0.0d, 0.0d}));
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float[] fa = {-0.0f, -0.0f, 0.0f, -0.0f};
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Arrays.sort(fa, 1, 4);
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check(Arrays.equals(fa, new float[] {-0.0f, -0.0f, -0.0f, 0.0f}));
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}
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//--------------------- Infrastructure ---------------------------
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volatile int passed = 0, failed = 0;
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void pass() {passed++;}
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void fail() {failed++; Thread.dumpStack();}
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void fail(String msg) {System.err.println(msg); fail();}
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void unexpected(Throwable t) {failed++; t.printStackTrace();}
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void check(boolean cond) {if (cond) pass(); else fail();}
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void equal(Object x, Object y) {
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if (x == null ? y == null : x.equals(y)) pass();
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else fail(x + " not equal to " + y);}
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public static void main(String[] args) throws Throwable {
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new FloatDoubleOrder().instanceMain(args);}
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void instanceMain(String[] args) throws Throwable {
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try {test(args);} catch (Throwable t) {unexpected(t);}
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System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
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if (failed > 0) throw new AssertionError("Some tests failed");}
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}
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