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

private static String convertBase62ToDecimal(String ident62) {
    Long decimal = 0L;//from w  ww  .  ja v  a2  s.  c  om
    int base = 62;
    Long keisu = 0L;
    int cnt = 0;

    byte ident[] = ident62.getBytes();
    for (int i = ident.length - 1; i >= 0; i--) {
        int num = 0;
        if (ident[i] > 48 && ident[i] <= 57) {
            num = ident[i] - 48;
        } else if (ident[i] >= 65 && ident[i] <= 90) {
            num = ident[i] - 65 + 10;
        } else if (ident[i] >= 97 && ident[i] <= 122) {
            num = ident[i] - 97 + 10 + 26;
        }
        keisu = Math.round(java.lang.Math.pow((double) base, (double) cnt));
        decimal += num * keisu;
        cnt++;
    }
    return String.format("%08d", decimal);
}

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From source file:Main.java

public static int getZoomLevelAsInt(double zoomLevel) {
    return (int) Math.round(zoomLevel);
}

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From source file:Main.java

public static int calculateInSampleSize(int width, int height, int reqWidth, int reqHeight) {
    int inSampleSize = 1;
    if (height > reqHeight || width > reqWidth) {
        if (width > height) {
            inSampleSize = Math.round((float) height / (float) reqHeight);
        } else {//from www.  j  av  a 2 s .co  m
            inSampleSize = Math.round((float) width / (float) reqWidth);
        }
    }

    return inSampleSize;
}

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From source file:Main.java

/**
 *  Convert RGB Color to a HSL values.//ww  w  .ja  va 2  s.c  om
 *  
 *  <li>H (Hue) is specified as degrees in the range 0 - 360.</li>
 *  <li>S (Saturation) is specified as a percentage in the range 1 - 100.</li>
 *  <li>L (Lumanance) is specified as a percentage in the range 1 - 100.</li>
 *
 *  @param color the RGB color
 *  @return the HSL values
 */
public static int[] colorToHSL(int color) {
    int[] hsl = new int[3];
    float[] hsl_float = hslFromRGB(color);

    hsl[0] = (int) Math.round(hsl_float[0]);
    hsl[1] = (int) Math.round(hsl_float[1]);
    hsl[2] = (int) Math.round(hsl_float[2]);

    return hsl;
}

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From source file:Main.java

private static void rgb2cmyk(int R, int G, int B, int[] cmyk) {
    float C = 1 - (float) R / 255;
    float M = 1 - (float) G / 255;
    float Y = 1 - (float) B / 255;
    float K = 1;//w  w w . ja v a2  s  .com

    if (C < K)
        K = C;
    if (M < K)
        K = M;
    if (Y < K)
        K = Y;

    if (K == 1) {
        //pure black
        C = 0;
        M = 0;
        Y = 0;
    } else {
        C = (C - K) / (1 - K);
        M = (M - K) / (1 - K);
        Y = (Y - K) / (1 - K);
    }

    cmyk[0] = (int) Math.round(C * 100);
    cmyk[1] = (int) Math.round(M * 100);
    cmyk[2] = (int) Math.round(Y * 100);
    cmyk[3] = (int) Math.round(K * 100);
}

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From source file:Main.java

/**
 *  Convert RGB Color to a HSV values. //  w  w w  .  ja  v a 2s  .  c  om
 *  
 *  <li>H (Hue) is specified as degrees in the range 0 - 360.</li>
 *  <li>S (Saturation) is specified as a percentage in the range 1 - 100.</li>
 *  <li>V (Value) is specified as a percentage in the range 1 - 100.</li>
 *
 *  @param color the RGB color
 *  @return the HSV values
 */
public static int[] colorToHSV(int color) {
    int[] hsv = new int[3];
    float[] hsv_float = new float[3];

    Color.colorToHSV(color, hsv_float);

    hsv[0] = (int) Math.round(hsv_float[0]);
    hsv[1] = (int) Math.round(hsv_float[1] * 100);
    hsv[2] = (int) Math.round(hsv_float[2] * 100);

    hsv[0] = (int) (hsv_float[0]);
    hsv[1] = (int) (hsv_float[1] * 100);
    hsv[2] = (int) (hsv_float[2] * 100);

    return hsv;
}

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From source file:Main.java

public static Bitmap Bytes2Bimap(byte[] bytes, int maxSize) {
    try {//w  ww . j  av  a  2  s  .  com
        if (bytes == null) {
            return null;
        }

        if (bytes.length != 0) {
            BitmapFactory.Options opt = new BitmapFactory.Options();
            opt.inJustDecodeBounds = true;
            BitmapFactory.decodeByteArray(bytes, 0, bytes.length, opt);

            int scale = 1;

            if ((opt.outHeight > maxSize) || (opt.outWidth > maxSize)) {
                scale = (int) Math.pow(2, (int) Math.round(
                        Math.log(maxSize / (double) Math.max(opt.outHeight, opt.outWidth)) / Math.log(0.5)));
            }

            BitmapFactory.Options newOpt = new BitmapFactory.Options();
            newOpt.inSampleSize = scale;

            return BitmapFactory.decodeByteArray(bytes, 0, bytes.length, newOpt);
        } else {
            return null;
        }
    } catch (Exception ex) {
        return null;
    }
}

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From source file:Main.java

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
public static Bitmap blur(Context context, Bitmap image) {
    int width = Math.round(image.getWidth() * BITMAP_SCALE);
    int height = Math.round(image.getHeight() * BITMAP_SCALE);

    Bitmap inputBitmap = Bitmap.createScaledBitmap(image, width, height, false);
    Bitmap outputBitmap = Bitmap.createBitmap(inputBitmap);

    RenderScript rs = RenderScript.create(context);
    ScriptIntrinsicBlur theIntrinsic = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
    Allocation tmpIn = Allocation.createFromBitmap(rs, inputBitmap);
    Allocation tmpOut = Allocation.createFromBitmap(rs, outputBitmap);
    theIntrinsic.setRadius(BLUR_RADIUS);
    theIntrinsic.setInput(tmpIn);//from ww  w .  j ava 2s . c  o m
    theIntrinsic.forEach(tmpOut);
    tmpOut.copyTo(outputBitmap);

    return outputBitmap;
}

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From source file:Main.java

public static int calculateInSampleSize(BitmapFactory.Options options, Context context) {
    int reqWidth = context.getResources().getDisplayMetrics().widthPixels;
    int reqHeight = context.getResources().getDisplayMetrics().heightPixels;

    // Raw height and width of image
    final int imgheight = options.outHeight;
    final int imgwidth = options.outWidth;
    int inSampleSize = 1;

    if (imgheight > reqHeight || imgwidth > reqWidth) {
        if (imgwidth > imgheight) {
            inSampleSize = Math.round((float) imgheight / (float) reqHeight);
        } else {/*from  w  w w  . ja  v a  2  s. com*/
            inSampleSize = Math.round((float) imgwidth / (float) reqWidth);
        }
    }
    return inSampleSize;
}

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From source file:Main.java

static BufferedImage average(BufferedImage[] images) {
    BufferedImage average = new BufferedImage(images[0].getWidth(), images[0].getHeight(),
            BufferedImage.TYPE_BYTE_GRAY);
    WritableRaster raster = average.getRaster().createCompatibleWritableRaster();
    for (int k = 0; k < images[0].getHeight(); ++k) {
        for (int j = 0; j < images[0].getWidth(); ++j) {
            float sum = 0.0f;
            for (int i = 0; i < images.length; ++i) {
                sum = sum + images[i].getRaster().getSample(j, k, 0);
            }//from  ww  w  .jav a2s  . c  o  m
            raster.setSample(j, k, 0, Math.round(sum / images.length));
        }
    }
    average.setData(raster);
    return average;
}

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