1 /*
2 * Copyright (c) 2003, 2007, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
36 * represent the exact numerical result, the discarded digits will be
37 * referred to as the <i>discarded fraction</i> regardless the digits'
38 * contribution to the value of the number. In other words,
39 * considered as a numerical value, the discarded fraction could have
40 * an absolute value greater than one.
41 *
42 * <p>Each rounding mode description includes a table listing how
43 * different two-digit decimal values would round to a one digit
44 * decimal value under the rounding mode in question. The result
45 * column in the tables could be gotten by creating a
46 * {@code BigDecimal} number with the specified value, forming a
47 * {@link MathContext} object with the proper settings
48 * ({@code precision} set to {@code 1}, and the
49 * {@code roundingMode} set to the rounding mode in question), and
50 * calling {@link BigDecimal#round round} on this number with the
51 * proper {@code MathContext}. A summary table showing the results
52 * of these rounding operations for all rounding modes appears below.
53 *
54 *<p>
55 *<table border>
56 * <caption top><h3>Summary of Rounding Operations Under Different Rounding Modes</h3></caption>
57 * <tr><th></th><th colspan=8>Result of rounding input to one digit with the given
58 * rounding mode</th>
59 * <tr valign=top>
60 * <th>Input Number</th> <th>{@code UP}</th>
61 * <th>{@code DOWN}</th>
62 * <th>{@code CEILING}</th>
63 * <th>{@code FLOOR}</th>
64 * <th>{@code HALF_UP}</th>
65 * <th>{@code HALF_DOWN}</th>
66 * <th>{@code HALF_EVEN}</th>
67 * <th>{@code UNNECESSARY}</th>
68 *
69 * <tr align=right><td>5.5</td> <td>6</td> <td>5</td> <td>6</td> <td>5</td> <td>6</td> <td>5</td> <td>6</td> <td>throw {@code ArithmeticException}</td>
70 * <tr align=right><td>2.5</td> <td>3</td> <td>2</td> <td>3</td> <td>2</td> <td>3</td> <td>2</td> <td>2</td> <td>throw {@code ArithmeticException}</td>
71 * <tr align=right><td>1.6</td> <td>2</td> <td>1</td> <td>2</td> <td>1</td> <td>2</td> <td>2</td> <td>2</td> <td>throw {@code ArithmeticException}</td>
72 * <tr align=right><td>1.1</td> <td>2</td> <td>1</td> <td>2</td> <td>1</td> <td>1</td> <td>1</td> <td>1</td> <td>throw {@code ArithmeticException}</td>
73 * <tr align=right><td>1.0</td> <td>1</td> <td>1</td> <td>1</td> <td>1</td> <td>1</td> <td>1</td> <td>1</td> <td>1</td>
74 * <tr align=right><td>-1.0</td> <td>-1</td> <td>-1</td> <td>-1</td> <td>-1</td> <td>-1</td> <td>-1</td> <td>-1</td> <td>-1</td>
75 * <tr align=right><td>-1.1</td> <td>-2</td> <td>-1</td> <td>-1</td> <td>-2</td> <td>-1</td> <td>-1</td> <td>-1</td> <td>throw {@code ArithmeticException}</td>
76 * <tr align=right><td>-1.6</td> <td>-2</td> <td>-1</td> <td>-1</td> <td>-2</td> <td>-2</td> <td>-2</td> <td>-2</td> <td>throw {@code ArithmeticException}</td>
|
1 /*
2 * Copyright (c) 2003, 2011, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
36 * represent the exact numerical result, the discarded digits will be
37 * referred to as the <i>discarded fraction</i> regardless the digits'
38 * contribution to the value of the number. In other words,
39 * considered as a numerical value, the discarded fraction could have
40 * an absolute value greater than one.
41 *
42 * <p>Each rounding mode description includes a table listing how
43 * different two-digit decimal values would round to a one digit
44 * decimal value under the rounding mode in question. The result
45 * column in the tables could be gotten by creating a
46 * {@code BigDecimal} number with the specified value, forming a
47 * {@link MathContext} object with the proper settings
48 * ({@code precision} set to {@code 1}, and the
49 * {@code roundingMode} set to the rounding mode in question), and
50 * calling {@link BigDecimal#round round} on this number with the
51 * proper {@code MathContext}. A summary table showing the results
52 * of these rounding operations for all rounding modes appears below.
53 *
54 *<p>
55 *<table border>
56 * <caption top><b>Summary of Rounding Operations Under Different Rounding Modes</b></caption>
57 * <tr><th></th><th colspan=8>Result of rounding input to one digit with the given
58 * rounding mode</th>
59 * <tr valign=top>
60 * <th>Input Number</th> <th>{@code UP}</th>
61 * <th>{@code DOWN}</th>
62 * <th>{@code CEILING}</th>
63 * <th>{@code FLOOR}</th>
64 * <th>{@code HALF_UP}</th>
65 * <th>{@code HALF_DOWN}</th>
66 * <th>{@code HALF_EVEN}</th>
67 * <th>{@code UNNECESSARY}</th>
68 *
69 * <tr align=right><td>5.5</td> <td>6</td> <td>5</td> <td>6</td> <td>5</td> <td>6</td> <td>5</td> <td>6</td> <td>throw {@code ArithmeticException}</td>
70 * <tr align=right><td>2.5</td> <td>3</td> <td>2</td> <td>3</td> <td>2</td> <td>3</td> <td>2</td> <td>2</td> <td>throw {@code ArithmeticException}</td>
71 * <tr align=right><td>1.6</td> <td>2</td> <td>1</td> <td>2</td> <td>1</td> <td>2</td> <td>2</td> <td>2</td> <td>throw {@code ArithmeticException}</td>
72 * <tr align=right><td>1.1</td> <td>2</td> <td>1</td> <td>2</td> <td>1</td> <td>1</td> <td>1</td> <td>1</td> <td>throw {@code ArithmeticException}</td>
73 * <tr align=right><td>1.0</td> <td>1</td> <td>1</td> <td>1</td> <td>1</td> <td>1</td> <td>1</td> <td>1</td> <td>1</td>
74 * <tr align=right><td>-1.0</td> <td>-1</td> <td>-1</td> <td>-1</td> <td>-1</td> <td>-1</td> <td>-1</td> <td>-1</td> <td>-1</td>
75 * <tr align=right><td>-1.1</td> <td>-2</td> <td>-1</td> <td>-1</td> <td>-2</td> <td>-1</td> <td>-1</td> <td>-1</td> <td>throw {@code ArithmeticException}</td>
76 * <tr align=right><td>-1.6</td> <td>-2</td> <td>-1</td> <td>-1</td> <td>-2</td> <td>-2</td> <td>-2</td> <td>-2</td> <td>throw {@code ArithmeticException}</td>
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