Example usage for java.lang StrictMath tanh

Introduction

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

Prototype

public static native double tanh(double x);

Source Link

Document

Returns the hyperbolic tangent of a double value.

Usage

From source file:Main.java

public static void main(String[] args) {

    double d1 = (90 * Math.PI) / 180, d2 = 0.0;
    double d3 = (1.0) / (0.0), d4 = -(1.0) / (0.0);

    System.out.println("hyperbolic tangent of d1 = " + StrictMath.tanh(d1));

    System.out.println("hyperbolic tangent of d2 = " + StrictMath.tanh(d2));

    System.out.println("hyperbolic tangent of d3 = " + StrictMath.tanh(d3));

    System.out.println("hyperbolic tangent of d4 = " + StrictMath.tanh(d4));
}

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

public void testTanh() {
    System.gc();//from ww  w. ja  v  a 2  s.  c  o  m
    double x = 0;
    long time = System.nanoTime();
    for (int i = 0; i < RUNS; i++)
        x += StrictMath.tanh(i * F1);
    long strictTime = System.nanoTime() - time;

    System.gc();
    double y = 0;
    time = System.nanoTime();
    for (int i = 0; i < RUNS; i++)
        y += FastMath.tanh(i * F1);
    long fastTime = System.nanoTime() - time;

    System.gc();
    double z = 0;
    time = System.nanoTime();
    for (int i = 0; i < RUNS; i++)
        z += Math.tanh(i * F1);
    long mathTime = System.nanoTime() - time;

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

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