Example usage for java.lang StrictMath abs

Introduction

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

Prototype

public static double abs(double a) 

Source Link

Document

Returns the absolute value of a double value.

Usage

From source file:Main.java

public static void main(String[] args) {

    int i1 = 12, i2 = -34;

    System.out.println("absolute value of " + i1 + " = " + StrictMath.abs(i1));

    System.out.println("absolute value of " + i2 + " = " + StrictMath.abs(i2));
}

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From source file:Main.java

public static void main(String[] args) {

    float f1 = 12, f2 = -1;

    System.out.println("absolute value of " + f1 + " = " + StrictMath.abs(f1));

    System.out.println("absolute value of " + f2 + " = " + StrictMath.abs(f2));
}

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From source file:Main.java

public static void main(String[] args) {

    double d1 = 1245.6, d2 = -123.4;

    System.out.println("absolute value of " + d1 + " = " + StrictMath.abs(d1));

    System.out.println("absolute value of " + d2 + " = " + StrictMath.abs(d2));
}

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From source file:Main.java

public static void main(String[] args) {

    long l1 = 12345678909876L, l2 = -12345678909876L;

    // returns the absolute value of positive long value
    long lAbsValue = StrictMath.abs(l1);
    System.out.println("absolute value of " + l1 + " = " + lAbsValue);

    // returns the absolute value of negative long value
    lAbsValue = StrictMath.abs(l2);
    System.out.println("absolute value of " + l2 + " = " + lAbsValue);
}

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From source file:net.nicoulaj.benchmarks.math.DoubleAbs.java

@GenerateMicroBenchmark
public void strictmath(BlackHole hole) {
    for (int i = 0; i < data.length - 1; i++)
        hole.consume(StrictMath.abs(data[i]));
}

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From source file:gis.proj.drivers.Snyder.java

protected static double toDD(String dms) {
    double dd;/*from www.  j a v  a  2s. c  om*/

    dms = dms.toLowerCase();
    String[] deg = dms.split("d");

    if (deg.length > 1) {
        String[] min = deg[1].split("m");

        double sec = 0;
        if (min.length > 1)
            sec = Double.parseDouble(min[1].split("s")[0]);

        double sign = Double.parseDouble(deg[0]) < 0.0 ? -1.0 : 1.0;

        dd = (StrictMath.abs(Double.parseDouble(deg[0])) + Double.parseDouble(min[0]) / 60.0 + sec / 3600.0)
                * sign;
    } else
        dd = Double.parseDouble(deg[0]);

    return dd;
}

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From source file:org.cirdles.calamari.algorithms.TukeyBiweight.java

public static ValueModel calculateTukeyBiweightMean(String name, double tuningConstant, double[] values) {
    // guarantee termination
    BigDecimal epsilon = BigDecimal.ONE.movePointLeft(10);
    int iterationMax = 100;
    int iterationCounter = 0;

    int n = values.length;
    // initial mean is median
    BigDecimal mean = new BigDecimal(calculateMedian(values));

    // initial sigma is median absolute deviation from mean = median (MAD)
    double deviations[] = new double[n];
    for (int i = 0; i < values.length; i++) {
        deviations[i] = StrictMath.abs(values[i] - mean.doubleValue());
    }//w ww .  ja v a2  s. co m
    BigDecimal sigma = new BigDecimal(calculateMedian(deviations)).max(BigDecimal.valueOf(SQUID_TINY_VALUE));

    BigDecimal previousMean;
    BigDecimal previousSigma;

    do {
        iterationCounter++;
        previousMean = mean;
        previousSigma = sigma;

        // init to zeroes
        BigDecimal[] deltas = new BigDecimal[n];
        BigDecimal[] u = new BigDecimal[n];
        BigDecimal sa = BigDecimal.ZERO;
        BigDecimal sb = BigDecimal.ZERO;
        BigDecimal sc = BigDecimal.ZERO;

        BigDecimal tee = new BigDecimal(tuningConstant).multiply(sigma);

        for (int i = 0; i < n; i++) {
            deltas[i] = new BigDecimal(values[i]).subtract(mean);
            if (tee.compareTo(deltas[i].abs()) > 0) {
                deltas[i] = new BigDecimal(values[i]).subtract(mean);
                u[i] = deltas[i].divide(tee, MathContext.DECIMAL128);
                BigDecimal uSquared = u[i].multiply(u[i]);
                sa = sa.add(deltas[i].multiply(BigDecimal.ONE.subtract(uSquared).pow(2)).pow(2));
                sb = sb.add(BigDecimal.ONE.subtract(uSquared)
                        .multiply(BigDecimal.ONE.subtract(new BigDecimal(5.0).multiply(uSquared))));
                sc = sc.add(u[i].multiply(BigDecimal.ONE.subtract(uSquared).pow(2)));
            }
        }

        sigma = bigDecimalSqrtBabylonian(sa.multiply(new BigDecimal(n))).divide(sb.abs(),
                MathContext.DECIMAL128);
        sigma = sigma.max(BigDecimal.valueOf(SQUID_TINY_VALUE));
        mean = previousMean.add(tee.multiply(sc).divide(sb, MathContext.DECIMAL128));

    } // both tests against epsilon must pass OR iterations top out
      // april 2016 Simon B discovered we need 101 iterations possible, hence the "<=" below
    while (((sigma.subtract(previousSigma).abs().divide(sigma, MathContext.DECIMAL128).compareTo(epsilon) > 0)//
            || mean.subtract(previousMean).abs().divide(mean, MathContext.DECIMAL128).compareTo(epsilon) > 0)//
            && (iterationCounter <= iterationMax));

    return new ValueModel(name, mean, "ABS", sigma);
}

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From source file:org.esa.beam.util.math.FastMathPerformance.java

public void testAbs() {
    System.gc();/*ww w .j av a2s .  c om*/
    double x = 0;
    long time = System.nanoTime();
    for (int i = 0; i < RUNS; i++)
        x += StrictMath.abs(i * (1 - 0.5 * RUNS));
    long strictTime = System.nanoTime() - time;

    System.gc();
    double y = 0;
    time = System.nanoTime();
    for (int i = 0; i < RUNS; i++)
        y += FastMath.abs(i * (1 - 0.5 * RUNS));
    long fastTime = System.nanoTime() - time;

    System.gc();
    double z = 0;
    time = System.nanoTime();
    for (int i = 0; i < RUNS; i++)
        x += Math.abs(i * (1 - 0.5 * RUNS));
    long mathTime = System.nanoTime() - time;

    report("abs", x + y + z, strictTime, fastTime, mathTime);
}

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From source file:org.esa.beam.util.math.FastMathTest.java

@Test
public void testMathAbsStrict() {
    for (double i = 0; i < numItr; ++i) {
        double val = StrictMath.abs(i);
    }/*from ww  w . ja va2 s  .com*/
}

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