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

/**
 * Creates a mutable bitmap from subset of source bitmap, transformed by the optional matrix.
 *///from w w w .  j a  v a2  s.  c om
private static Bitmap createBitmap(Bitmap source, int x, int y, int width, int height, Matrix m) {
    // Re-implement Bitmap createBitmap() to always return a mutable bitmap.
    Canvas canvas = new Canvas();

    Bitmap bitmap;
    Paint paint;
    if ((m == null) || m.isIdentity()) {
        bitmap = Bitmap.createBitmap(width, height, source.getConfig());
        paint = null;
    } else {
        RectF rect = new RectF(0, 0, width, height);
        m.mapRect(rect);
        bitmap = Bitmap.createBitmap(Math.round(rect.width()), Math.round(rect.height()), source.getConfig());

        canvas.translate(-rect.left, -rect.top);
        canvas.concat(m);

        paint = new Paint(Paint.FILTER_BITMAP_FLAG);
        if (!m.rectStaysRect()) {
            paint.setAntiAlias(true);
        }
    }
    bitmap.setDensity(source.getDensity());
    canvas.setBitmap(bitmap);

    Rect srcBounds = new Rect(x, y, x + width, y + height);
    RectF dstBounds = new RectF(0, 0, width, height);
    canvas.drawBitmap(source, srcBounds, dstBounds, paint);
    return bitmap;
}

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From source file:Main.java

public static final String formatSpace(final long limit) {
    if (limit < 1024L) {
        return limit + " B";
    } else if (limit < (1024L * 1024)) {
        return (Math.round(limit / 10.24) / 100.0) + " KB";
    } else if (limit < (1024L * 1024 * 1024)) {
        return (Math.round(limit / 1024 / 10.24) / 100.0) + " MB";
    } else if (limit < (1024L * 1024 * 1024 * 1024)) {
        return (Math.round(limit / 1024.0 / 1024.0 / 10.24) / 100.0) + " GB";
    } else {//  w w  w .  ja v a2s  .c om
        return (Math.round(limit / 1024.0 / 1024.0 / 1024.0 / 10.24) / 100.0) + " TB";
    }
}

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From source file:Main.java

static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
    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  ww w .  ja  va  2s  . c  om
            inSampleSize = Math.round((float) width / (float) reqWidth);
        }
    }
    return inSampleSize;
}

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From source file:Main.java

/**
 * Convert touch position x:y to {@link Camera.Area} position -1000:-1000 to 1000:1000.
 *//*from   w  w  w  .java2s.c o m*/
private static Rect calculateTapArea(Camera camera, float x, float y, float coefficient) {
    float focusAreaSize = 300;
    int areaSize = Float.valueOf(focusAreaSize * coefficient).intValue();

    int centerX = (int) (x / getResolution(camera).width - 1000);
    int centerY = (int) (y / getResolution(camera).height - 1000);

    int left = clamp(centerX - areaSize / 2, -1000, 1000);
    int top = clamp(centerY - areaSize / 2, -1000, 1000);

    RectF rectF = new RectF(left, top, left + areaSize, top + areaSize);

    return new Rect(Math.round(rectF.left), Math.round(rectF.top), Math.round(rectF.right),
            Math.round(rectF.bottom));
}

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From source file:br.com.diegosilva.jsfcomponents.util.Utils.java

public static int generateRandomNumber() {
    return (int) Math.round(1 + (Math.random() * 1000000));
}

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From source file:Main.java

/**
 * For a string containing a number as judged by
 * <code>isNumber()</code>, return the numerical value, rounded to
 * an integer./*w w  w  .  jav a  2  s.  co  m*/
 *
 * @return the numeric value, rounded to an integer, or 0
 * if the string is not a valid number.
 */
public static int getNumber(String string) {
    String s = string.trim();
    if (!isNumber(s))
        return 0;
    double value = 0;
    try {
        value = Double.parseDouble(s);
    } catch (NumberFormatException e) {
        //logger.warn("Unexpected number value `" + s + "'");
    }
    return (int) Math.round(value);
}

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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;

        // This offers some additional logic in case the image has a strange
        // aspect ratio. For example, a panorama may have a much larger
        // width than height. In these cases the total pixels might still
        // end up being too large to fit comfortably in memory, so we should
        // be more aggressive with sample down the image (=larger inSampleSize).

        final float totalPixels = width * height;

        // Anything more than 2x the requested pixels we'll sample down further
        final float totalReqPixelsCap = reqWidth * reqHeight * 2;

        while (totalPixels / (inSampleSize * inSampleSize) > totalReqPixelsCap) {
            inSampleSize++;/*from   w  w w.j  a v a2s  . c  om*/
        }
    }
    return inSampleSize;
}

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From source file:testes.Histograma.java

private static IntervalXYDataset crearDataset() {
    //guarda os dados do histograma
    HistogramDataset dados = new HistogramDataset();
    int classes, min, max;

    //valores da amos
    //double amostra[] = {7,8,9,10,10,10.2,10.8,11,12,12};
    double amostra[] = { 89, 85, 93, 81, 77, 83, 87, 81, 83, 89, 81, 86, 80, 84, 82 };
    if (amostra.length <= 25) {
        classes = 5;/*from w w w.j ava 2  s  .  c  om*/
    } else {
        classes = (int) Math.round(Math.sqrt(amostra.length));
    }

    dados.addSeries("Frequncias da Amostra", amostra, classes, 77, 95);
    return dados;
}

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From source file:Main.java

public static void setBestExposure(Camera.Parameters parameters, boolean lightOn) {
    int minExposure = parameters.getMinExposureCompensation();
    int maxExposure = parameters.getMaxExposureCompensation();
    float step = parameters.getExposureCompensationStep();
    if ((minExposure != 0 || maxExposure != 0) && step > 0.0f) {
        // Set low when light is on
        float targetCompensation = lightOn ? MIN_EXPOSURE_COMPENSATION : MAX_EXPOSURE_COMPENSATION;
        int compensationSteps = Math.round(targetCompensation / step);
        float actualCompensation = step * compensationSteps;
        // Clamp value:
        compensationSteps = Math.max(Math.min(compensationSteps, maxExposure), minExposure);
        if (parameters.getExposureCompensation() == compensationSteps) {
            Log.i(TAG,//from w w  w .j  a  v  a2  s.  c  o m
                    "Exposure compensation already set to " + compensationSteps + " / " + actualCompensation);
        } else {
            Log.i(TAG, "Setting exposure compensation to " + compensationSteps + " / " + actualCompensation);
            parameters.setExposureCompensation(compensationSteps);
        }
    } else {
        Log.i(TAG, "Camera does not support exposure compensation");
    }
}

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From source file:Main.java

private static Drawable getMoreSuggestionsHint(final Resources res, final float textSize, final int color) {
    final Paint paint = new Paint();
    paint.setAntiAlias(true);/* w  w  w .j  a  v a 2 s.c om*/
    paint.setTextAlign(Align.CENTER);
    paint.setTextSize(textSize);
    paint.setColor(color);
    final Rect bounds = new Rect();
    paint.getTextBounds(MORE_SUGGESTIONS_HINT, 0, MORE_SUGGESTIONS_HINT.length(), bounds);
    final int width = Math.round(bounds.width() + 0.5f);
    final int height = Math.round(bounds.height() + 0.5f);
    final Bitmap buffer = Bitmap.createBitmap(width, (height * 3 / 2), Bitmap.Config.ARGB_8888);
    final Canvas canvas = new Canvas(buffer);
    canvas.drawText(MORE_SUGGESTIONS_HINT, width / 2, height, paint);
    return new BitmapDrawable(res, buffer);
}

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