Example usage for java.lang Math signum

Introduction

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

Prototype

public static float signum(float f)

Source Link

Document

Returns the signum function of the argument; zero if the argument is zero, 1.0f if the argument is greater than zero, -1.0f if the argument is less than zero.

Usage

From source file:Main.java

public static void main(String[] args) {

    float x = 12.34f;
    float y = -4f;

    // call signum for both floats and print the result
    System.out.println("Math.signum(" + x + ")=" + Math.signum(x));
    System.out.println("Math.signum(" + y + ")=" + Math.signum(y));

}

From source file:Main.java

public static void main(String[] args) {

    double x = 12.34;
    double y = -4;

    // call signum for both doubles and print the result
    System.out.println("Math.signum(" + x + ")=" + Math.signum(x));
    System.out.println("Math.signum(" + y + ")=" + Math.signum(y));

}

From source file:Main.java

public static void main(String[] args) {
    int a = 10;// ww w.  ja va 2  s .com
    int b = -50;
    int c = 3;
    double x = 25.0;
    double y = 3.0;
    double z = 4.0;

    System.out.println("abs(b)     = " + Math.abs(b));
    System.out.println("cbrt(x)   = " + Math.cbrt(x));
    System.out.println("exp(y)     = " + Math.exp(z));
    System.out.println("hypot(y, z)= " + Math.hypot(y, z));

    System.out.println("log(y)    = " + Math.log(y));
    System.out.println("log10(y)  = " + Math.log10(y));
    System.out.println("max(a, b) = " + Math.max(a, b));
    System.out.println("min(a, b) = " + Math.min(a, b));
    System.out.println("pow(a, c) = " + Math.pow(a, c));
    System.out.println("random()  = " + Math.random());
    System.out.println("signum(b) = " + Math.signum(b));
    System.out.println("sqrt(x)   = " + Math.sqrt(y));
}

From source file:Main.java

public static int compareLongs(@Nullable Long one, @Nullable Long another, boolean ascending) {
    return one != null
            ? (another != null//from w  w w. j  a  v a  2  s . c  om
                    ? !ascending ? (int) Math.signum(another - one) : (int) Math.signum(one - another)
                    : 1)
            : -1;
}

From source file:Main.java

public static int compareFloats(@Nullable Float one, @Nullable Float another, boolean ascending) {
    return one != null
            ? (another != null//from www.ja  va 2s  .  c  o m
                    ? !ascending ? (int) Math.signum(another - one) : (int) Math.signum(one - another)
                    : 1)
            : -1;
}

From source file:Main.java

public static int compareInts(@Nullable Integer one, @Nullable Integer another, boolean ascending) {
    return one != null
            ? (another != null/*from  w w  w . ja  v  a 2s .c  o m*/
                    ? !ascending ? (int) Math.signum(another - one) : (int) Math.signum(one - another)
                    : 1)
            : -1;
}

From source file:Main.java

public static int compareDouble(@Nullable Double one, @Nullable Double another, boolean ascending) {
    return one != null
            ? (another != null// ww  w .jav  a2s .  com
                    ? !ascending ? (int) Math.signum(another - one) : (int) Math.signum(one - another)
                    : 1)
            : -1;
}

From source file:Main.java

public static String generateHashWhereClause(double lat, double lng) {
    double latHash = (lat + 180) / LATLON_SECTION;
    double lngHash = (lng + 180) / LATLON_SECTION;
    int latHashRounded = (int) Math.round(latHash);
    int lngHashRounded = (int) Math.round(lngHash);

    int iHash = getHash(latHashRounded, lngHashRounded);
    String whereClause = "hash = " + iHash;

    int nearbyLat = 0;
    int nearbyLng = 0;
    double overlap = LATLON_SECTION_EDGE;
    if (Math.abs(latHash - latHashRounded) > (0.5 - overlap))
        nearbyLat = (int) Math.signum(latHash - latHashRounded);

    if (Math.abs(lngHash - lngHashRounded) > (0.5 - overlap))
        nearbyLng = (int) Math.signum(lngHash - lngHashRounded);

    if (nearbyLat != 0)
        whereClause += " OR hash = " + getHash(latHashRounded + nearbyLat, lngHashRounded);
    if (nearbyLng != 0)
        whereClause += " OR hash = " + getHash(latHashRounded, lngHashRounded + nearbyLng);
    if ((nearbyLat != 0) && (nearbyLng != 0))
        whereClause += " OR hash = " + getHash(latHashRounded + nearbyLat, lngHashRounded + nearbyLng);

    Log.d(TAG,//from   ww  w . j av a2 s  . com
            "HotspotDbHelper generateHashWhereClause lat: " + lat + " lon: " + lng + " Where: " + whereClause);
    return whereClause;
}

From source file:MyComparator.java

public int compare(Entry o1, Entry o2) {
    Double valueOne = (Double) o1.getValue();
    Double valueTwo = (Double) o2.getValue();
    return (int) Math.signum(valueOne.compareTo(valueTwo));
}

From source file:Main.java

public static <T> void testComparator(List<? extends T> list, Comparator<T> comparator) {
    for (int i = 0; i < list.size(); i++) {
        for (int j = i; j < list.size(); j++) {
            T oi = list.get(i);/*  w  w w  .  j a va 2 s. c  om*/
            T oj = list.get(j);

            int ci = comparator.compare(oi, oj);
            int cj = comparator.compare(oj, oi);

            if (Math.signum(ci) != -Math.signum(cj)) {
                throw new RuntimeException("Bad comparator: " + comparator + "\n\tlist.get(" + i + "): " + oi
                        + "\n\tlist.get(" + j + "): " + oj + "\ncompare(list.get(" + i + "), list.get(" + j
                        + ")): " + ci + "\ncompare(list.get(" + j + "), list.get(" + i + ")): " + cj);
            }
        }
    }
}