Java Double Number Round round(double val, int places)

Description

Round value.

License

Apache License

Parameter

Parameter	Description
val	Value to round.
places	Numbers after point.

Return

Rounded value;

Declaration

public static double round(double val, int places) 

Method Source Code

//package com.java2s;
/*/* w  w w  .  ja  v  a  2s .  co  m*/
 * 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 value.
     *
     * @param val Value to round.
     * @param places Numbers after point.
     * @return Rounded value;
     */
    public static double round(double val, int places) {
        if (places < 0)
            throw new IllegalArgumentException();

        long factor = (long) Math.pow(10, places);

        val *= factor;

        long tmp = Math.round(val);

        return (double) tmp / factor;
    }
}

Related

1. round(double val)
2. round(double val)
3. round(double val)
4. round(double val, int decimalHouses)
5. round(double val, int decimalPlaces)
6. round(double val, int places)
7. round(double val, int places)
8. round(double val, long dec)
9. round(double valor)