Java Double Number Round round(double val)

Description

round

License

Open Source License

Declaration

public static double round(double val) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

public class Main {
    public static double round(double val) {
        int precision = 10000; //keep 4 digits
        return Math.floor(val * precision + .5) / precision;
    }//from w ww.  ja v a  2  s .com

    public static double round(float val) {
        int precision = 10000; //keep 4 digits
        return Math.floor(val * precision + .5) / precision;
    }

    public static double round(double val, int n) {
        int precision = 1;
        for (int i = 0; i < n; i++)
            precision *= 10;
        return Math.floor(val * precision + .5) / precision;
    }

    public static float round(float val, int n) {
        int precision = 1;
        for (int i = 0; i < n; i++)
            precision *= 10;
        return (float) (Math.floor(val * precision + .5) / precision);
    }
}

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