Java Float Number Round roundTo(float num, int dp)

Description

Round the value to the specified number of decimal points.

License

Open Source License

Parameter

Parameter	Description
num	the number to round
dp	the number of decimal points.

Declaration

public static float roundTo(float num, int dp) 

Method Source Code

//package com.java2s;
/*// w  w  w.ja  v  a 2  s .c  om
 * The MIT License
 *
 * Copyright 2015 Ned Hyett.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

import java.math.RoundingMode;
import java.text.DecimalFormat;

public class Main {
    /**
     * Round the value to the specified number of decimal points.
     *
     * @param num the number to round
     * @param dp  the number of decimal points.
     * @return
     */
    public static float roundTo(float num, int dp) {
        StringBuilder sb = new StringBuilder();
        sb.append("#");
        if (dp > 0)
            sb.append(".");
        for (int i = 0; i < dp; i++)
            sb.append("#");
        DecimalFormat df = new DecimalFormat(sb.toString());
        df.setRoundingMode(RoundingMode.HALF_UP);
        return Float.parseFloat(df.format(num));
    }
}

Related

1. round(float val, int places)
2. round(float value, float epsilon)
3. round(float value, float snap)
4. round(float x)
5. round(float x, float y)