Example usage for java.lang Math pow

Introduction

In this page you can find the example usage for java.lang Math pow.

Prototype

@HotSpotIntrinsicCandidate
public static double pow(double a, double b)

Source Link

Document

Returns the value of the first argument raised to the power of the second argument.

Usage

From source file:Main.java

public static double round(double value, int places) {
    if (places < 0) {
        throw new IllegalArgumentException();
    }//  w w  w  .ja v  a2  s .co  m

    long factor = (long) Math.pow(10, places);
    value = value * factor;
    long tmp = Math.round(value);
    return (double) tmp / factor;
}

From source file:Main.java

public static double getPhysicalSize(Activity context) {
    DisplayMetrics dm = getScreenSize(context);
    double diagonalPixels = Math.sqrt(Math.pow(dm.widthPixels, 2) + Math.pow(dm.heightPixels, 2));
    return diagonalPixels / (160 * dm.density);
}

From source file:Main.java

public static Double round(double value, int precision) {
    int scale = (int) Math.pow(10, precision);
    return (double) Math.round(value * scale) / scale;
}

From source file:Main.java

public static Double calculateEMI(Long principalAmount, double rateOfInterest, Long downPayment,
        double tenureInMonths) {
    Double emi = (((principalAmount - downPayment) * (rateOfInterest / (12 * 100)))
            * ((Math.pow((1 + (rateOfInterest / (12 * 100))), tenureInMonths))))
            / ((Math.pow((1 + (rateOfInterest / (12 * 100))), tenureInMonths)) - 1);
    return emi;/*  www.  jav a 2 s.  co  m*/
}

From source file:Main.java

/**
 * Returns the square root of the sum of squares of its arguments, see {@link Math#hypot(double, double)}
 *///from  ww  w  . j av a 2 s.  c  o  m
public static float hypo(int a, int b) {
    return (float) Math.sqrt(Math.pow(a, 2) + Math.pow(b, 2));
}

From source file:Main.java

public static double[] geoToMercator(double[] g) {
    double d = g[0] * Math.PI / 180, m = g[1] * Math.PI / 180, l = 6378137, k = 0.0818191908426,
            f = k * Math.sin(m);//from   ww w. j a va 2s. com
    double h = Math.tan(Math.PI / 4 + m / 2), j = Math.pow(Math.tan(Math.PI / 4 + Math.asin(f) / 2), k),
            i = h / j;
    // return new DoublePoint(Math.round(l * d), Math.round(l *
    // Math.log(i)));
    return new double[] { l * d, l * Math.log(i) };
}

From source file:Main.java

private static <T extends Enum<T>> int enumSetToBitwise(EnumSet<T> enumSet) {
    int bitwise = 0;
    for (Enum<T> enumValue : enumSet) {
        bitwise += (int) Math.pow(2, enumValue.ordinal());
    }/*from  w  w w. j a  v  a2  s  . c  om*/
    return bitwise;
}

From source file:Main.java

public static long[] getTileFromGeo(double lat, double lon, int zoom) {
    double rLon, rLat, a, k, z;
    rLon = lon * Math.PI / 180;//from w  w  w. j av  a2  s  .c o m
    rLat = lat * Math.PI / 180;
    a = 6378137;
    k = 0.0818191908426;
    z = Math.pow(Math.tan(Math.PI / 4 + rLat / 2) / (Math.tan(Math.PI / 4 + Math.asin(k * Math.sin(rLat)) / 2)),
            k);
    return new long[] { (int) (((20037508.342789 + a * rLon) * 53.5865938 / Math.pow(2, (23 - zoom))) / 256),
            (int) (((20037508.342789 - a * Math.log(z)) * 53.5865938 / Math.pow(2, (23 - zoom)))) / 256 };
}

From source file:Main.java

public static int byte2Int(byte b) {
    int ii = 0;//from ww  w  .j av  a 2  s .com
    int temp = 0x01;

    if (b >= 0)
        return (int) b;

    for (int i = 0; i < 8; i++) {
        if ((b & (temp << i)) != 0) {
            ii += Math.pow(2, i);
        }
    }
    return ii;
}

From source file:Main.java

public static double diffHsb(int hsb1[], final int hsb2[]) {
    if (hsb1 == null || hsb2 == null) {
        return 0.0;
    }/*from   w  w  w .  j  ava2s .co m*/
    if (hsb1.length < 3 || hsb2.length < 3) {
        return 0.0;
    }

    double h = Math.pow(hsb1[0] - hsb2[0], 2);
    double s = Math.pow(hsb1[1] - hsb2[1], 2);
    double b = Math.pow(hsb1[2] - hsb2[2], 2);

    return Math.sqrt(h + s + b);
}