Example usage for java.lang Math abs

Introduction

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

Prototype

@HotSpotIntrinsicCandidate
public static double abs(double a)

Source Link

Document

Returns the absolute value of a double value.

Usage

From source file:Main.java

/**
 * Returns the smallest angle between two angles.
 *
 * @param alpha First angle in degrees//from w  w w.j  av a  2  s. c  o  m
 * @param beta  Second angle in degrees
 * @return Smallest angle between two angles.
 */
public static double differenceBetweenAngles(double alpha, double beta) {
    double phi = Math.abs(beta - alpha) % 360;
    return phi > 180 ? 360 - phi : phi;
}

From source file:Main.java

public static int days(String day1, String day2, String format) {
    DateFormat df = new SimpleDateFormat(format);
    long days = 0;
    try {/*from  w  w w  . ja  v  a 2s.co m*/
        Date d1 = df.parse(day1);
        Date d2 = df.parse(day2);
        long diff = Math.abs(d1.getTime() - d2.getTime());
        days = diff / (1000 * 60 * 60 * 24);
    } catch (Exception e) {
    }
    return (int) days;
}

From source file:Main.java

public static int getDiffOfYears(Date starDate, Date endDate) {
    Calendar star = Calendar.getInstance();
    star.setTime(starDate);/*from w  ww .  j  a  v a 2s  . c  om*/
    Calendar end = Calendar.getInstance();
    end.setTime(endDate);
    int diffYear = star.get(Calendar.YEAR) - end.get(Calendar.YEAR);
    return Math.abs(diffYear);
}

From source file:Main.java

public static long getDiffOfMillis(Date starDate, Date endDate) {
    Calendar star = Calendar.getInstance();
    star.setTime(starDate);/*from   w  w  w .  j av a 2s. c  o m*/
    Calendar end = Calendar.getInstance();
    end.setTime(endDate);
    long diff = star.getTimeInMillis() - end.getTimeInMillis();
    long diffMillis = (Math.abs(diff));
    return diffMillis;
}

From source file:Main.java

public static String shortenString(String string, int targetLength, int maxDeviation) {
    targetLength = Math.abs(targetLength);
    maxDeviation = Math.abs(maxDeviation);
    if (string == null || string.length() <= targetLength + maxDeviation) {
        return string;
    }// www  .  j  av  a  2s .c  o m

    int currentDeviation = 0;
    while (currentDeviation <= maxDeviation) {
        try {
            if (string.charAt(targetLength) == ' ') {
                return string.substring(0, targetLength) + " ...";
            }
            if (string.charAt(targetLength + currentDeviation) == ' ') {
                return string.substring(0, targetLength + currentDeviation) + " ...";
            }
            if (string.charAt(targetLength - currentDeviation) == ' ') {
                return string.substring(0, targetLength - currentDeviation) + " ...";
            }
        } catch (Exception e) {
            //just in case
        }

        currentDeviation++;
    }

    return string.substring(0, targetLength) + " ...";

}

From source file:Main.java

public static Collection<Integer> seq(int start, int stop) {
    List<Integer> l = new ArrayList<Integer>(Math.abs(stop - start));
    for (int i = Math.min(start, stop); i <= Math.max(start, stop); i++) {
        l.add(i);//from www.j a va  2 s.  co  m
    }
    if (stop < start)
        Collections.reverse(l);
    return l;

}

From source file:Main.java

public static Size determineTargetPictureSize(Camera.Parameters params, int desiredResolution) {
    List<Size> sizes = params.getSupportedPictureSizes();
    Size targetSize = sizes.get(0);/*from  w  w w.  j  a v a 2  s  .c om*/
    int delta = Integer.MAX_VALUE;

    for (Size size : sizes) {
        int diff = Math.abs(desiredResolution - pixelCount(size));
        if (diff < delta) {
            targetSize = size;
            delta = diff;
        }
    }
    return targetSize;
}

From source file:Main.java

/**
 * Check if a position is within a circle
 *
 * @param x       x position//from   w  w  w.  ja v a2s  .  co m
 * @param y       y position
 * @param centerX center x of circle
 * @param centerY center y of circle
 * @return true if within circle, false otherwise
 */
static boolean isInCircle(float x, float y, float centerX, float centerY, float radius) {
    return Math.abs(x - centerX) < radius && Math.abs(y - centerY) < radius;
}

From source file:Main.java

/**Calculates the estimated distance between the access point based on frequency and signal strength in db. 
 * Based on the Free-space path loss equation at http://en.wikipedia.org/wiki/FSPL
 * //from  w  w  w . j  av  a 2  s  .c o  m
 * @param levelInDb
 * @param freqInMHz
 * @return
 */
public static double calculateDistance(double levelInDb, double freqInMHz) {
    double exp = (27.55 - (20 * Math.log10(freqInMHz)) + Math.abs(levelInDb)) / 20.0;
    return Math.pow(10.0, exp);
}

From source file:Main.java

/**
 * This method used to get difference from minute.
 * /* w  w w. java  2 s  .  c  o  m*/
 * @param miliseconds
 *            represented {@link Long} milliseconds
 * @return represented {@link Long}
 */
public static long getDfferenceInMinute(long miliseconds) {
    long diff = (Calendar.getInstance().getTimeInMillis() - miliseconds);
    diff = diff / 60000L;
    return Math.abs(diff);
}