src/share/classes/java/math/RoundingMode.java

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*** 49,59 **** * {@code roundingMode} set to the rounding mode in question), and * calling {@link BigDecimal#round round} on this number with the * proper {@code MathContext}. A summary table showing the results * of these rounding operations for all rounding modes appears below. * ! *<table border> * <caption><b>Summary of Rounding Operations Under Different Rounding Modes</b></caption> * <tr><th></th><th colspan=8>Result of rounding input to one digit with the given * rounding mode</th> * <tr valign=top> * <th>Input Number</th> <th>{@code UP}</th> --- 49,59 ---- * {@code roundingMode} set to the rounding mode in question), and * calling {@link BigDecimal#round round} on this number with the * proper {@code MathContext}. A summary table showing the results * of these rounding operations for all rounding modes appears below. * ! *<table border summary="Summary of rounding operations"> * <caption><b>Summary of Rounding Operations Under Different Rounding Modes</b></caption> * <tr><th></th><th colspan=8>Result of rounding input to one digit with the given * rounding mode</th> * <tr valign=top> * <th>Input Number</th> <th>{@code UP}</th>
*** 97,107 **** * digit prior to a non-zero discarded fraction. Note that this * rounding mode never decreases the magnitude of the calculated * value. * *<p>Example: ! *<table border> * <caption><b>Rounding mode UP Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code UP} rounding *<tr align=right><td>5.5</td> <td>6</td> *<tr align=right><td>2.5</td> <td>3</td> --- 97,107 ---- * digit prior to a non-zero discarded fraction. Note that this * rounding mode never decreases the magnitude of the calculated * value. * *<p>Example: ! *<table border summary="Rounding mode UP examples"> * <caption><b>Rounding mode UP Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code UP} rounding *<tr align=right><td>5.5</td> <td>6</td> *<tr align=right><td>2.5</td> <td>3</td>
*** 121,131 **** * Rounding mode to round towards zero. Never increments the digit * prior to a discarded fraction (i.e., truncates). Note that this * rounding mode never increases the magnitude of the calculated value. * *<p>Example: ! *<table border> * <caption><b>Rounding mode DOWN Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code DOWN} rounding *<tr align=right><td>5.5</td> <td>5</td> *<tr align=right><td>2.5</td> <td>2</td> --- 121,131 ---- * Rounding mode to round towards zero. Never increments the digit * prior to a discarded fraction (i.e., truncates). Note that this * rounding mode never increases the magnitude of the calculated value. * *<p>Example: ! *<table border summary="Rounding mode DOWN examples"> * <caption><b>Rounding mode DOWN Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code DOWN} rounding *<tr align=right><td>5.5</td> <td>5</td> *<tr align=right><td>2.5</td> <td>2</td>
*** 146,156 **** * result is positive, behaves as for {@code RoundingMode.UP}; * if negative, behaves as for {@code RoundingMode.DOWN}. Note * that this rounding mode never decreases the calculated value. * *<p>Example: ! *<table border> * <caption><b>Rounding mode CEILING Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code CEILING} rounding *<tr align=right><td>5.5</td> <td>6</td> *<tr align=right><td>2.5</td> <td>3</td> --- 146,156 ---- * result is positive, behaves as for {@code RoundingMode.UP}; * if negative, behaves as for {@code RoundingMode.DOWN}. Note * that this rounding mode never decreases the calculated value. * *<p>Example: ! *<table border summary="Rounding mode CEILING examples"> * <caption><b>Rounding mode CEILING Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code CEILING} rounding *<tr align=right><td>5.5</td> <td>6</td> *<tr align=right><td>2.5</td> <td>3</td>
*** 171,181 **** * result is positive, behave as for {@code RoundingMode.DOWN}; * if negative, behave as for {@code RoundingMode.UP}. Note that * this rounding mode never increases the calculated value. * *<p>Example: ! *<table border> * <caption><b>Rounding mode FLOOR Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code FLOOR} rounding *<tr align=right><td>5.5</td> <td>5</td> *<tr align=right><td>2.5</td> <td>2</td> --- 171,181 ---- * result is positive, behave as for {@code RoundingMode.DOWN}; * if negative, behave as for {@code RoundingMode.UP}. Note that * this rounding mode never increases the calculated value. * *<p>Example: ! *<table border summary="Rounding mode FLOOR examples"> * <caption><b>Rounding mode FLOOR Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code FLOOR} rounding *<tr align=right><td>5.5</td> <td>5</td> *<tr align=right><td>2.5</td> <td>2</td>
*** 198,208 **** * fraction is &ge; 0.5; otherwise, behaves as for * {@code RoundingMode.DOWN}. Note that this is the rounding * mode commonly taught at school. * *<p>Example: ! *<table border> * <caption><b>Rounding mode HALF_UP Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code HALF_UP} rounding *<tr align=right><td>5.5</td> <td>6</td> *<tr align=right><td>2.5</td> <td>3</td> --- 198,208 ---- * fraction is &ge; 0.5; otherwise, behaves as for * {@code RoundingMode.DOWN}. Note that this is the rounding * mode commonly taught at school. * *<p>Example: ! *<table border summary="Rounding mode HALF_UP examples"> * <caption><b>Rounding mode HALF_UP Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code HALF_UP} rounding *<tr align=right><td>5.5</td> <td>6</td> *<tr align=right><td>2.5</td> <td>3</td>
*** 224,234 **** * down. Behaves as for {@code RoundingMode.UP} if the discarded * fraction is &gt; 0.5; otherwise, behaves as for * {@code RoundingMode.DOWN}. * *<p>Example: ! *<table border> * <caption><b>Rounding mode HALF_DOWN Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code HALF_DOWN} rounding *<tr align=right><td>5.5</td> <td>5</td> *<tr align=right><td>2.5</td> <td>2</td> --- 224,234 ---- * down. Behaves as for {@code RoundingMode.UP} if the discarded * fraction is &gt; 0.5; otherwise, behaves as for * {@code RoundingMode.DOWN}. * *<p>Example: ! *<table border summary="Rounding mode HALF_DOWN examples"> * <caption><b>Rounding mode HALF_DOWN Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code HALF_DOWN} rounding *<tr align=right><td>5.5</td> <td>5</td> *<tr align=right><td>2.5</td> <td>2</td>
*** 257,267 **** * chiefly used in the USA. This rounding mode is analogous to * the rounding policy used for {@code float} and {@code double} * arithmetic in Java. * *<p>Example: ! *<table border> * <caption><b>Rounding mode HALF_EVEN Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code HALF_EVEN} rounding *<tr align=right><td>5.5</td> <td>6</td> *<tr align=right><td>2.5</td> <td>2</td> --- 257,267 ---- * chiefly used in the USA. This rounding mode is analogous to * the rounding policy used for {@code float} and {@code double} * arithmetic in Java. * *<p>Example: ! *<table border summary="Rounding mode HALF_EVEN examples"> * <caption><b>Rounding mode HALF_EVEN Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code HALF_EVEN} rounding *<tr align=right><td>5.5</td> <td>6</td> *<tr align=right><td>2.5</td> <td>2</td>
*** 281,291 **** * Rounding mode to assert that the requested operation has an exact * result, hence no rounding is necessary. If this rounding mode is * specified on an operation that yields an inexact result, an * {@code ArithmeticException} is thrown. *<p>Example: ! *<table border> * <caption><b>Rounding mode UNNECESSARY Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code UNNECESSARY} rounding *<tr align=right><td>5.5</td> <td>throw {@code ArithmeticException}</td> *<tr align=right><td>2.5</td> <td>throw {@code ArithmeticException}</td> --- 281,291 ---- * Rounding mode to assert that the requested operation has an exact * result, hence no rounding is necessary. If this rounding mode is * specified on an operation that yields an inexact result, an * {@code ArithmeticException} is thrown. *<p>Example: ! *<table border summary="Rounding mode UNNECESSARY examples"> * <caption><b>Rounding mode UNNECESSARY Examples</b></caption> *<tr valign=top><th>Input Number</th> * <th>Input rounded to one digit<br> with {@code UNNECESSARY} rounding *<tr align=right><td>5.5</td> <td>throw {@code ArithmeticException}</td> *<tr align=right><td>2.5</td> <td>throw {@code ArithmeticException}</td>