Example usage for java.lang Math ceil

Introduction

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

Prototype

public static double ceil(double a)

Source Link

Document

Returns the smallest (closest to negative infinity) double value that is greater than or equal to the argument and is equal to a mathematical integer.

Usage

From source file:Main.java

public static int computeMaxActiveApplicationsPerUser(int maxActiveApplications, int userLimit,
        float userLimitFactor) {
    return Math.max((int) Math.ceil(maxActiveApplications * (userLimit / 100.0f) * userLimitFactor), 1);
}

From source file:Main.java

private static int computeInitialSampleSize(int w, int h, int minSideLength, int maxNumOfPixels) {
    if (maxNumOfPixels == UNCONSTRAINED && minSideLength == UNCONSTRAINED)
        return 1;

    int lowerBound = (maxNumOfPixels == UNCONSTRAINED) ? 1
            : (int) Math.ceil(Math.sqrt((double) (w * h) / maxNumOfPixels));

    if (minSideLength == UNCONSTRAINED) {
        return lowerBound;
    } else {/*from   w ww  .  ja v a 2s.  c  o  m*/
        int sampleSize = Math.min(w / minSideLength, h / minSideLength);
        return Math.max(sampleSize, lowerBound);
    }
}

From source file:Main.java

private static int computeInitialSampleSize(int w, int h, int minSideLength, int maxNumOfPixels) {
    if (maxNumOfPixels == UNCONSTRAINED && minSideLength == UNCONSTRAINED)
        return 1;

    int lowerBound = (maxNumOfPixels == UNCONSTRAINED) ? 1
            : (int) Math.ceil(Math.sqrt((float) (w * h) / maxNumOfPixels));

    if (minSideLength == UNCONSTRAINED) {
        return lowerBound;
    } else {/*  w  ww .  ja va  2  s . c o  m*/
        int sampleSize = Math.min(w / minSideLength, h / minSideLength);
        return Math.max(sampleSize, lowerBound);
    }
}

From source file:Main.java

/**
 * draw the image to viewBitmap in scale mode.
 * @param viewBitmap Bitmap to be displayed on the device.
 * @param bitmap Bitmap image./*w ww .  ja  va2 s .  c  o m*/
 */
public static void drawImageForScalesMode(final Bitmap viewBitmap, final Bitmap bitmap) {

    float startGridX = 0;
    float startGridY = 0;

    float getSizeW = bitmap.getWidth();
    float getSizeH = bitmap.getHeight();

    float scale;
    final int width = viewBitmap.getWidth();
    final int height = viewBitmap.getHeight();
    if ((getSizeW / width) > (getSizeH / height)) {
        scale = width / getSizeW;
    } else {
        scale = height / getSizeH;
    }

    int targetW = (int) Math.ceil(scale * getSizeW);
    int targetH = (int) Math.ceil(scale * getSizeH);

    Bitmap resizedBitmap = Bitmap.createScaledBitmap(bitmap, targetW, targetH, false);

    if ((getSizeW / width) > (getSizeH / height)) {
        startGridY = (height / 2 - targetH / 2);
    } else {
        startGridX = (width / 2 - targetW / 2);
    }

    Canvas canvas = new Canvas(viewBitmap);
    canvas.drawBitmap(resizedBitmap, startGridX, startGridY, null);
}

From source file:Main.java

public static int getMaxZoomLevel(int imageWidth, int imageHeight) {
    int biggerSize = imageWidth > imageHeight ? imageWidth : imageHeight;

    if (biggerSize == 0) {
        return 0;
    }/*from w w w. ja  va2s  .  com*/

    return (int) Math.ceil(Math.log((double) biggerSize) / Math.log(2.0));
}

From source file:Main.java

/**
 * @author chri//from w  w w. j ava 2  s.c  om
 */
public static String roundDecimalsToString(double d) {
    // using DecimalFormat we get i18n issues.
    if (d < 10)
        return String.valueOf(Math.ceil(d * 100) / 100);
    if (d < 100)
        return String.valueOf(Math.ceil(d * 10) / 10);
    else
        return String.valueOf(Math.round(d));
}

From source file:Main.java

public static int dp(float value) {
    if (value == 0) {
        return 0;
    }/*from   w w  w  .ja va  2 s.c  o m*/
    return (int) Math.ceil(density * value);
}

From source file:Main.java

/**
 * This function decodes a base 2 string into its corresponding byte array.
 *
 * @param base2 The base 2 encoded string.
 * @return The corresponding byte array.
 *//*from  w w w  .j av  a  2 s  .co  m*/
static public byte[] decode(String base2) {
    String string = base2.replaceAll("\\s", ""); // remove all white space
    int length = string.length();
    byte[] bytes = new byte[(int) Math.ceil(length / 8)];
    for (int i = 0; i < bytes.length; i++) {
        int b = 0;
        for (int j = 0; j < 8; j++) {
            char character = string.charAt(i * 8 + j);
            int bit = lookupTable.indexOf(character);
            if (bit < 0)
                throw new NumberFormatException("Attempted to decode a string that is not base 2: " + string);
            b = (b << 1) | bit;
        }
        bytes[i] = (byte) b;
    }
    return bytes;
}

From source file:com.mycompany.semconsolewebapp.FFT.java

public static int nextPower2(int length) {
    if (length == 0) {
        return 0;
    } else {/*  ww  w.  j  av a2  s.c  o  m*/
        return 1 << (int) Math.ceil(Math.log(length) / Math.log(2));
    }
}

From source file:Main.java

/**
 * Returns the 'percentile' value in array
 * @param array   A {@code double} array 
 * @param percentile The percentile value to obtain between 0-1
 * @return returns value at {@code percentile} in {@code array}
 * *///  w  w  w .j  a  v a2  s .  c o  m
public static double percentile(double[] array, double percentile) {
    Arrays.sort(array);
    if (array.length == 0 || percentile < 0 || percentile > 1)
        throw new IllegalArgumentException();
    double k = (array.length - 1) * percentile;
    double f = Math.floor(k);
    double c = Math.ceil(k);
    if (f == c)
        return array[(int) k];
    return array[(int) f] * (c - k) + array[(int) c] * (k - f);
}