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import java.math.BigDecimal;
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*
*/
public class Main {
/**
* Round the given value to the specified number of decimal places. The
* value is rounded using the {@link BigDecimal#ROUND_HALF_UP} method.
*
* @param x the value to round.
* @param scale the number of digits to the right of the decimal point.
* @return the rounded value.
* @since 1.1
*/
public static double round(double x, int scale) {
return round(x, scale, BigDecimal.ROUND_HALF_UP);
}
/**
* Round the given value to the specified number of decimal places. The
* value is rounded using the given method which is any method defined in
* {@link BigDecimal}.
*
* @param x the value to round.
* @param scale the number of digits to the right of the decimal point.
* @param roundingMethod the rounding method as defined in
* {@link BigDecimal}.
* @return the rounded value.
* @since 1.1
*/
public static double round(double x, int scale, int roundingMethod) {
try {
return (new BigDecimal
(Double.toString(x))
.setScale(scale, roundingMethod))
.doubleValue();
} catch (NumberFormatException ex) {
if (Double.isInfinite(x)) {
return x;
} else {
return Double.NaN;
}
}
}
}
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