Example usage for java.lang StrictMath atan

Introduction

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

Prototype

public static native double atan(double a);

Source Link

Document

Returns the arc tangent of a value; the returned angle is in the range -pi/2 through pi/2.

Usage

From source file:Main.java

public static void main(String[] args) {

    double d1 = 0.20, d2 = 60.00, d3 = 0;

    System.out.println("arc tangent of " + d1 + " = " + StrictMath.atan(d1));

    System.out.println("arc tangent of " + d2 + " = " + StrictMath.atan(d2));

    System.out.println("arc tangent of " + d3 + " = " + StrictMath.atan(d3));
}

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

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

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

public void testAtan() {
    System.gc();/*from www . jav a  2 s. c  o m*/
    double x = 0;
    long time = System.nanoTime();
    for (int i = 0; i < RUNS; i++)
        x += StrictMath.atan(i * F1);
    long strictTime = System.nanoTime() - time;

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

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

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

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