Java Double Number Round round(double n, double nd)

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Description

round

License

Apache License

Declaration 

public static final double round(double n, double nd)

Method Source Code

//package com.java2s;
//License from project: Apache License 

public class Main {
    public static final double round(double n, double nd) {
        if (isFinite(n) && isFinite(nd)) {
            double sign_n = (n < 0) ? -1 : 1;
            double abs_n = Math.abs(n);
            double factor = Math.pow(10, nd);
            return sign_n * Math.round(abs_n * factor) / factor;
        } else {/*from   w w  w . j  av  a 2  s.co  m*/
            return Double.NaN;
        }
    }

    public static final boolean isFinite(double x) {
        return !(Double.isInfinite(x) || Double.isNaN(x));
    }
}

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