Example usage for java.lang Math round

Introduction

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

Prototype

public static long round(double a)

Source Link

Document

Returns the closest long to the argument, with ties rounding to positive infinity.

Usage

From source file:Main.java

@SuppressWarnings("unused")
public static int getMatrixRotateDegrees(Matrix matrix) {
    synchronized (MATRIX_VALUES) {
        matrix.getValues(MATRIX_VALUES);
        final float skewX = MATRIX_VALUES[Matrix.MSKEW_X];
        final float scaleX = MATRIX_VALUES[Matrix.MSCALE_X];
        //noinspection SuspiciousNameCombination
        final int degrees = (int) Math.round(Math.atan2(skewX, scaleX) * (180 / Math.PI));
        if (degrees < 0) {
            return Math.abs(degrees);
        } else if (degrees > 0) {
            return 360 - degrees;
        } else {/*www . j  a  v  a  2 s .c  o m*/
            return 0;
        }
    }
}

From source file:Main.java

public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
    // Raw height and width of image
    final int height = options.outHeight;
    final int width = options.outWidth;
    int inSampleSize = 1;

    if (height > reqHeight || width > reqWidth) {
        final int heightRatio = Math.round((float) height / (float) reqHeight);
        final int widthRatio = Math.round((float) width / (float) reqWidth);

        inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
    }/*from w w  w.j ava 2  s.c  om*/

    return inSampleSize;
}

From source file:Main.java

public static double getDistance(double lat1, double lng1, double lat2, double lng2) {
    double radLat1 = rad(lat1);
    double radLat2 = rad(lat2);
    double a = radLat1 - radLat2;
    double b = rad(lng1) - rad(lng2);
    double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2)
            + Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)));
    s = s * EARTH_RADIUS;//from   w  w  w  .j  av a  2  s  .  c om
    s = Math.round(s * 10000d) / 10000d;
    s = s * 1000;
    return s;
}

From source file:Main.java

public static void constrainTo(Dimension dim, int width, int height) {

    boolean widthBigger = dim.width > dim.height;

    constrainTo(dim, widthBigger ? width : height);

    if ((widthBigger && dim.height > height) || (!widthBigger && dim.width > width)) {

        int size = (int) Math.round(widthBigger ? (height / (double) dim.height) * width
                : (width / (double) dim.width) * dim.height);
        constrainTo(dim, size);/*from  ww  w . ja va  2 s. c o m*/
    }
}

From source file:Main.java

private static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
    // Raw height and width of image
    final int height = options.outHeight;
    final int width = options.outWidth;
    int inSampleSize = 1;

    if (height > reqHeight || width > reqWidth) {

        // Calculate ratios of height and width to requested height and width
        final int heightRatio = Math.round((float) height / (float) reqHeight);
        final int widthRatio = Math.round((float) width / (float) reqWidth);

        // Choose the smallest ratio as inSampleSize value, this will guarantee
        // a final image with both dimensions larger than or equal to the
        // requested height and width.
        inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
    }//www.  j  av  a2s .  c om

    return inSampleSize;
}

From source file:Main.java

/**
 * Formats a float value to the given number of decimals. Returns the length of the string. The string begins at
 * [endIndex] - [return value] and ends at [endIndex]. It's up to you to check indexes correctness.
 * /*w  ww.j a va  2s.co m*/
 * Parameter [endIndex] can be helpful when you want to append some text to formatted value.
 * 
 * @return number of characters of formatted value
 */
public static int formatFloat(final char[] formattedValue, float value, int endIndex, int digits,
        char separator) {
    if (digits >= POW10.length) {
        formattedValue[endIndex - 1] = '.';
        return 1;
    }
    boolean negative = false;
    if (value == 0) {
        formattedValue[endIndex - 1] = '0';
        return 1;
    }
    if (value < 0) {
        negative = true;
        value = -value;
    }
    if (digits > POW10.length) {
        digits = POW10.length - 1;
    }
    value *= POW10[digits];
    long lval = Math.round(value);
    int index = endIndex - 1;
    int charCount = 0;
    while (lval != 0 || charCount < (digits + 1)) {
        int digit = (int) (lval % 10);
        lval = lval / 10;
        formattedValue[index--] = (char) (digit + '0');
        charCount++;
        if (charCount == digits) {
            formattedValue[index--] = separator;
            charCount++;
        }
    }
    if (negative) {
        formattedValue[index--] = '-';
        charCount++;
    }
    return charCount;
}

From source file:Main.java

private static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
    // Raw height and width of image
    final int height = options.outHeight;
    final int width = options.outWidth;
    int inSampleSize = 1;

    if (height > reqHeight || width > reqWidth) {
        if (width > height)
            inSampleSize = Math.round((float) height / (float) reqHeight);
        else/*from  w  w  w . j a va 2s .  c o  m*/
            inSampleSize = Math.round((float) width / (float) reqWidth);
    }

    return inSampleSize;
}

From source file:Main.java

private static int calculateBatteryPercentage(int level, int scale) {
    return Math.round((level / (float) scale) * 100);
}

From source file:Main.java

public static int scaleColor(int color, float factor, boolean scaleAlpha) {
    return Color.argb(scaleAlpha ? (Math.round(Color.alpha(color) * factor)) : Color.alpha(color),
            Math.round(Color.red(color) * factor), Math.round(Color.green(color) * factor),
            Math.round(Color.blue(color) * factor));
}

From source file:Main.java

public static void fillVerGradient(Graphics g, Color[] colors, int x, int y, int w, int h) {
    int steps = colors.length;
    double dx = (double) w / (double) steps;
    int x1 = x;//from  w w w  . j  a  v  a  2s  .  c  o m
    for (int i = 0; i < steps; i++) {
        int x2 = x + (int) Math.round((double) i * dx);
        g.setColor(colors[i]);
        if (i == (steps - 1)) {
            g.fillRect(x1, y, x + w - x1, h);
        } else {
            g.fillRect(x1, y, x2 - x1, h);
        }
        x1 = x2;
    }
}