Example usage for java.lang Math max

Introduction

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

Prototype

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

Source Link

Document

Returns the greater of two double values.

Usage

From source file:Main.java

/**
 * Creates an approximated cubic gradient using a multi-stop linear gradient. See
 * <a href="https://plus.google.com/+RomanNurik/posts/2QvHVFWrHZf">this post</a> for more
 * details.//w  w w.j  a  v  a  2  s .co  m
 */
public static Drawable makeCubicGradientScrimDrawable(int baseColor, int numStops, int gravity) {

    // Generate a cache key by hashing together the inputs, based on the method described in the Effective Java book
    int cacheKeyHash = baseColor;
    cacheKeyHash = 31 * cacheKeyHash + numStops;
    cacheKeyHash = 31 * cacheKeyHash + gravity;

    Drawable cachedGradient = cubicGradientScrimCache.get(cacheKeyHash);
    if (cachedGradient != null) {
        return cachedGradient;
    }

    numStops = Math.max(numStops, 2);

    PaintDrawable paintDrawable = new PaintDrawable();
    paintDrawable.setShape(new RectShape());

    final int[] stopColors = new int[numStops];

    int red = Color.red(baseColor);
    int green = Color.green(baseColor);
    int blue = Color.blue(baseColor);
    int alpha = Color.alpha(baseColor);

    for (int i = 0; i < numStops; i++) {
        float x = i * 1f / (numStops - 1);
        float opacity = Math.max(0, Math.min(1, (float) Math.pow(x, 3)));
        stopColors[i] = Color.argb((int) (alpha * opacity), red, green, blue);
    }

    final float x0, x1, y0, y1;
    switch (gravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
    case Gravity.START:
        x0 = 1;
        x1 = 0;
        break;
    case Gravity.END:
        x0 = 0;
        x1 = 1;
        break;
    default:
        x0 = 0;
        x1 = 0;
        break;
    }
    switch (gravity & Gravity.VERTICAL_GRAVITY_MASK) {
    case Gravity.TOP:
        y0 = 1;
        y1 = 0;
        break;
    case Gravity.BOTTOM:
        y0 = 0;
        y1 = 1;
        break;
    default:
        y0 = 0;
        y1 = 0;
        break;
    }

    paintDrawable.setShaderFactory(new ShapeDrawable.ShaderFactory() {
        @Override
        public Shader resize(int width, int height) {
            return new LinearGradient(width * x0, height * y0, width * x1, height * y1, stopColors, null,
                    Shader.TileMode.CLAMP);
        }
    });

    cubicGradientScrimCache.put(cacheKeyHash, paintDrawable);
    return paintDrawable;
}

---

From source file:Main.java

/**
 * A fast blur algorithm. This is not being used. Instead
 * use render script {RSBlur} as it is fast and uses the GPU for it.
 * @param sentBitmap/*from w w w .j a v a2  s. c  om*/
 * @param radius
 * @return
 */
public static Bitmap FastBlur(Bitmap sentBitmap, int radius) {
    Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);

    if (radius < 1) {
        return (null);
    }

    int w = bitmap.getWidth();
    int h = bitmap.getHeight();

    int[] pix = new int[w * h];
    Log.e(TAG, w + " " + h + " " + pix.length);
    bitmap.getPixels(pix, 0, w, 0, 0, w, h);

    int wm = w - 1;
    int hm = h - 1;
    int wh = w * h;
    int div = radius + radius + 1;

    int r[] = new int[wh];
    int g[] = new int[wh];
    int b[] = new int[wh];
    int rsum, gsum, bsum, x, y, i, p, yp, yi, yw;
    int vmin[] = new int[Math.max(w, h)];

    int divsum = (div + 1) >> 1;
    divsum *= divsum;
    int dv[] = new int[256 * divsum];
    for (i = 0; i < 256 * divsum; i++) {
        dv[i] = (i / divsum);
    }

    yw = yi = 0;

    int[][] stack = new int[div][3];
    int stackpointer;
    int stackstart;
    int[] sir;
    int rbs;
    int r1 = radius + 1;
    int routsum, goutsum, boutsum;
    int rinsum, ginsum, binsum;

    for (y = 0; y < h; y++) {
        rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
        for (i = -radius; i <= radius; i++) {
            p = pix[yi + Math.min(wm, Math.max(i, 0))];
            sir = stack[i + radius];
            sir[0] = (p & 0xff0000) >> 16;
            sir[1] = (p & 0x00ff00) >> 8;
            sir[2] = (p & 0x0000ff);
            rbs = r1 - Math.abs(i);
            rsum += sir[0] * rbs;
            gsum += sir[1] * rbs;
            bsum += sir[2] * rbs;
            if (i > 0) {
                rinsum += sir[0];
                ginsum += sir[1];
                binsum += sir[2];
            } else {
                routsum += sir[0];
                goutsum += sir[1];
                boutsum += sir[2];
            }
        }
        stackpointer = radius;

        for (x = 0; x < w; x++) {

            r[yi] = dv[rsum];
            g[yi] = dv[gsum];
            b[yi] = dv[bsum];

            rsum -= routsum;
            gsum -= goutsum;
            bsum -= boutsum;

            stackstart = stackpointer - radius + div;
            sir = stack[stackstart % div];

            routsum -= sir[0];
            goutsum -= sir[1];
            boutsum -= sir[2];

            if (y == 0) {
                vmin[x] = Math.min(x + radius + 1, wm);
            }
            p = pix[yw + vmin[x]];

            sir[0] = (p & 0xff0000) >> 16;
            sir[1] = (p & 0x00ff00) >> 8;
            sir[2] = (p & 0x0000ff);

            rinsum += sir[0];
            ginsum += sir[1];
            binsum += sir[2];

            rsum += rinsum;
            gsum += ginsum;
            bsum += binsum;

            stackpointer = (stackpointer + 1) % div;
            sir = stack[(stackpointer) % div];

            routsum += sir[0];
            goutsum += sir[1];
            boutsum += sir[2];

            rinsum -= sir[0];
            ginsum -= sir[1];
            binsum -= sir[2];

            yi++;
        }
        yw += w;
    }
    for (x = 0; x < w; x++) {
        rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
        yp = -radius * w;
        for (i = -radius; i <= radius; i++) {
            yi = Math.max(0, yp) + x;

            sir = stack[i + radius];

            sir[0] = r[yi];
            sir[1] = g[yi];
            sir[2] = b[yi];

            rbs = r1 - Math.abs(i);

            rsum += r[yi] * rbs;
            gsum += g[yi] * rbs;
            bsum += b[yi] * rbs;

            if (i > 0) {
                rinsum += sir[0];
                ginsum += sir[1];
                binsum += sir[2];
            } else {
                routsum += sir[0];
                goutsum += sir[1];
                boutsum += sir[2];
            }

            if (i < hm) {
                yp += w;
            }
        }
        yi = x;
        stackpointer = radius;
        for (y = 0; y < h; y++) {
            // Preserve alpha channel: ( 0xff000000 & pix[yi] )
            pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum];

            rsum -= routsum;
            gsum -= goutsum;
            bsum -= boutsum;

            stackstart = stackpointer - radius + div;
            sir = stack[stackstart % div];

            routsum -= sir[0];
            goutsum -= sir[1];
            boutsum -= sir[2];

            if (x == 0) {
                vmin[y] = Math.min(y + r1, hm) * w;
            }
            p = x + vmin[y];

            sir[0] = r[p];
            sir[1] = g[p];
            sir[2] = b[p];

            rinsum += sir[0];
            ginsum += sir[1];
            binsum += sir[2];

            rsum += rinsum;
            gsum += ginsum;
            bsum += binsum;

            stackpointer = (stackpointer + 1) % div;
            sir = stack[stackpointer];

            routsum += sir[0];
            goutsum += sir[1];
            boutsum += sir[2];

            rinsum -= sir[0];
            ginsum -= sir[1];
            binsum -= sir[2];

            yi += w;
        }
    }

    Log.e(TAG, w + " " + h + " " + pix.length);
    bitmap.setPixels(pix, 0, w, 0, 0, w, h);

    return (bitmap);
}

---

From source file:Main.java

/**
 * Transform source Bitmap to targeted width and height.
 *///  w w  w  .j av a  2s.  c om
private static Bitmap transform(Matrix scaler, Bitmap source, int targetWidth, int targetHeight,
        boolean recycle) {

    float bitmapWidthF = source.getWidth();
    float bitmapHeightF = source.getHeight();

    float bitmapAspect = bitmapWidthF / bitmapHeightF;
    float viewAspect = (float) targetWidth / targetHeight;

    if (bitmapAspect > viewAspect) {
        float scale = targetHeight / bitmapHeightF;
        if (scale < .9F || scale > 1F) {
            scaler.setScale(scale, scale);
        } else {
            scaler = null;
        }
    } else {
        float scale = targetWidth / bitmapWidthF;
        if (scale < .9F || scale > 1F) {
            scaler.setScale(scale, scale);
        } else {
            scaler = null;
        }
    }

    Bitmap b1;
    if (scaler != null) {
        // this is used for minithumb and crop, so we want to filter here.
        b1 = Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), scaler, true);
    } else {
        b1 = source;
    }

    if (recycle && b1 != source) {
        source.recycle();
    }

    int dx1 = Math.max(0, b1.getWidth() - targetWidth);
    int dy1 = Math.max(0, b1.getHeight() - targetHeight);

    Bitmap b2 = Bitmap.createBitmap(b1, dx1 / 2, dy1 / 2, targetWidth, targetHeight, null, true);

    if (b2 != b1) {
        if (recycle || b1 != source) {
            b1.recycle();
        }
    }

    return b2;
}

---

From source file:WeakHashSet.java

public WeakHashSet(Collection c) {
    map = new WeakHashMap(Math.max((int) (c.size() / .75f) + 1, 16));
    addAll(c);
}

---

From source file:Main.java

/**
 * Methode permettant de splitter une liste en un certain nombre de sous-listes
 * @param list   Liste originale/*from   w w w. ja  va2 s .  co  m*/
 * @param subListNumber   Nombre de sous-listes souhaitees
 * @return   Liste de sous-liste splittee
 */
public static <T> List<List<T>> splitList(List<T> list, int subListNumber) {

    // Liste a retourner
    List<List<T>> splitted = new ArrayList<List<T>>();

    // Si la liste est vide
    if (list == null || list.size() == 0)
        return splitted;

    // Taille de la liste
    int listSize = list.size();

    // Nombre d'elements de la liste
    int subSize = Math.max(listSize / (subListNumber - 1), 1);

    // Parcours de la liste a splitter
    for (int i = 0; i < listSize; i += subSize) {

        // Ajout de la sous-liste
        splitted.add(new ArrayList<T>(list.subList(i, Math.min(listSize, i + subSize))));
    }

    // On retourne la liste des sous-listes
    return splitted;
}

---

From source file:Main.java

/**
 * Determine the maximum size for a 2-state button with the specified text and icons.
 * This can be used to make sure that a button doesn't resize during state change.
 *
 * @param button  the UI of this JButton is used for size determination
 * @param string1 text for 1st mode/*from   www  .j  a  v  a 2s.com*/
 * @param icon1   icon for 1st mode
 * @param string2 text for 2nd mode
 * @param icon2   icon for 2nd mode
 * @return the Dimension that contains both modes for the button.
 */
public static Dimension getMaxDimension(JButton button, String string1, ImageIcon icon1, String string2,
        ImageIcon icon2) {

    String originalText = button.getText();
    Icon originalIcon = button.getIcon();

    // Get dimensions for "Play" state
    button.setText(string1);
    button.setIcon(icon1);
    Dimension playSize = button.getUI().getPreferredSize(button);

    // Get dimensions for "Pause" state
    button.setText(string2);
    button.setIcon(icon2);
    Dimension pauseSize = button.getUI().getPreferredSize(button);

    // Restore original text and icon
    button.setText(originalText);
    button.setIcon(originalIcon);

    // Return max dimensions
    int maxWidth = (int) Math.max(playSize.getWidth(), pauseSize.getWidth());
    int maxHeight = (int) Math.max(playSize.getHeight(), pauseSize.getHeight());
    return new Dimension(maxWidth, maxHeight);
}

---

From source file:Main.java

public static void outputArrays(final Object first, final Object second) {
    if (!first.getClass().isArray()) {
        throw new IllegalArgumentException("first is not an array.");
    }//  w  w  w  . j av a 2  s.  c o  m
    if (!second.getClass().isArray()) {
        throw new IllegalArgumentException("second is not an array.");
    }

    final int lengthFirst = Array.getLength(first);
    final int lengthSecond = Array.getLength(second);
    final int length = Math.max(lengthFirst, lengthSecond);

    for (int idx = 0; idx < length; idx++) {
        System.out.print("[" + idx + "]\t");
        if (idx < lengthFirst) {
            System.out.print(Array.get(first, idx) + "\t\t");
        } else {
            System.out.print("\t\t");
        }
        if (idx < lengthSecond) {
            System.out.print(Array.get(second, idx) + "\t");
        }
        System.out.println();
    }
}

---

From source file:Main.java

public static void setTickMarkers(JSlider slider) {
    final int min = slider.getMinimum();
    final int max = slider.getMaximum();
    final int delta = max - min;

    if (delta > 0) {
        final int sliderSize;
        if (slider.getOrientation() == SwingConstants.HORIZONTAL)
            sliderSize = slider.getPreferredSize().width;
        else//from w  ww .j  av  a  2s  .c o m
            sliderSize = slider.getPreferredSize().height;

        // adjust ticks space on slider
        final int majTick = findBestMajTickSpace(sliderSize, delta);

        slider.setMinorTickSpacing(Math.max(1, majTick / 5));
        slider.setMajorTickSpacing(majTick);
        slider.setLabelTable(slider.createStandardLabels(slider.getMajorTickSpacing(), majTick));
    }
}

---

From source file:Main.java

public static Bitmap tryToGetBitmapFromInternet(String bitmapUrl, Context context, int imageSize) {
    if (null != bitmapUrl) {
        InputStream inputStream = null;
        try {/*from ww  w.j  av  a 2  s  .c o m*/
            URL url = new URL(bitmapUrl);

            URLConnection connection = url.openConnection();

            connection.connect();

            inputStream = connection.getInputStream();
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            byte[] buffer = new byte[1024];
            int read;

            while ((read = inputStream.read(buffer)) != -1) {
                byteArrayOutputStream.write(buffer, 0, read);
            }
            inputStream.close();
            byteArrayOutputStream.close();

            buffer = byteArrayOutputStream.toByteArray();

            BitmapFactory.Options options = new BitmapFactory.Options();
            options.inJustDecodeBounds = true;

            BitmapFactory.decodeByteArray(buffer, 0, buffer.length, options);

            int maxSize = Math.max(options.outWidth, options.outHeight);
            float newImageScale = 1f;
            if (-1 != imageSize) {
                newImageScale = maxSize / (imageSize * context.getResources().getDisplayMetrics().density);
            }

            options.inJustDecodeBounds = false;
            options.inSampleSize = Math.round(newImageScale);

            return BitmapFactory.decodeByteArray(buffer, 0, buffer.length, options);
        } catch (Throwable e) {
            // pass
        } finally {
            if (null != inputStream) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    // pass
                }
                inputStream = null;
            }
            System.gc();
        }
    }

    return null;
}

---

From source file:Main.java

/**
 * Computes a reasonable number of labels for a data range.
 * //from  w  w  w.j av  a2 s  .co  m
 * @param start start value
 * @param end final value
 * @param approxNumLabels desired number of labels
 * @return double[] array containing {start value, end value, increment}
 */
private static double[] computeLabels(final double start, final double end, final int approxNumLabels,
        double minimumJump) {
    if (Math.abs(start - end) < 0.0000001f) {
        return new double[] { start, start, 0 };
    }
    double s = start;
    double e = end;
    boolean switched = false;
    if (s > e) {
        switched = true;
        double tmp = s;
        s = e;
        e = tmp;
    }
    double xStep = roundUp(Math.max(Math.abs(s - e) / approxNumLabels, minimumJump));
    // Compute x starting point so it is a multiple of xStep.
    double xStart = xStep * Math.ceil(s / xStep);
    double xEnd = xStep * Math.floor(e / xStep);
    if (switched) {
        return new double[] { xEnd, xStart, -1.0 * xStep };
    }
    return new double[] { xStart, xEnd, xStep };
}

---

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