Can't find symbols errors ugh

[Azoth]

I am using Netbeans 8.2
I am trying out Apache math lib and it won't work
I installed the .jar files . See photo.
You can see the errors in the window in the pic as to the installed
.jar file
The following program is the demo .java to test it out

import org.apache.commons.math.optimization.general.EstimationException;
import org.apache.commons.math.optimization.general.EstimatedParameter;
import org.apache.commons.math.optimization.general.EstimationProblem;
import org.apache.commons.math.optimization.general.LevenbergMarquardtEstimator;
import org.apache.commons.math.optimization.general.SimpleEstimationProblem;
import org.apache.commons.math.optimization.general.WeightedMeasurement;

public class TrajectoryDeterminationProblem extends SimpleEstimationProblem {

    public static void main(String[] args) {
        try {
            TrajectoryDeterminationProblem problem =
              new TrajectoryDeterminationProblem(0.0, 100.0, 800.0, 1.0, 0.0);

            double[][] distances = {
                    {   0.0, 806.5849 }, {  20.0, 796.8148 }, {  40.0, 791.0833 }, {  60.0, 789.6712 },
                    {  80.0, 793.1334 }, { 100.0, 797.7248 }, { 120.0, 803.2785 }, { 140.0, 813.4939 },
                    { 160.0, 826.9295 }, { 180.0, 844.0640 }, { 200.0, 863.3829 }, { 220.0, 883.3143 },
                    { 240.0, 908.6867 }, { 260.0, 934.8561 }, { 280.0, 964.0730 }, { 300.0, 992.1033 },
                    { 320.0, 1023.998 }, { 340.0, 1057.439 }, { 360.0, 1091.912 }, { 380.0, 1125.968 },
                    { 400.0, 1162.789 }, { 420.0, 1201.517 }, { 440.0, 1239.176 }, { 460.0, 1279.347 } };
            for (int i = 0; i < distances.length; ++i) {
                problem.addDistanceMeasurement(1.0,  distances[i][0], distances[i][1]);
            };

            double[][] angles = {
                    { 10.0, 1.415423 }, { 30.0, 1.352643 }, { 50.0, 1.289290 }, { 70.0, 1.225249 },
                    { 90.0, 1.161203 }, {110.0, 1.098538 }, {130.0, 1.036263 }, {150.0, 0.976052 },
                    {170.0, 0.917921 }, {190.0, 0.861830 }, {210.0, 0.808237 }, {230.0, 0.757043 },
                    {250.0, 0.708650 }, {270.0, 0.662949 }, {290.0, 0.619903 }, {310.0, 0.579160 },
                    {330.0, 0.541033 }, {350.0, 0.505590 }, {370.0, 0.471746 }, {390.0, 0.440155 },
                    {410.0, 0.410522 }, {430.0, 0.382701 }, {450.0, 0.356957 }, {470.0, 0.332400 } };
            for (int i = 0; i < angles.length; ++i) {
                problem.addAngularMeasurement(3.0e7, angles[i][0], angles[i][1]);
            };

            LevenbergMarquardtEstimator estimator = new LevenbergMarquardtEstimator();
            estimator.estimate(problem);
            System.out.println("initial position: " + problem.getX0() + " " + problem.getY0());
            System.out.println("velocity: " + problem.getVx0() + " " + problem.getVy0());

        } catch (EstimationException ee) {
          System.err.println(ee.getMessage());
        }
    }

    public TrajectoryDeterminationProblem(double t0,
                                          double  x0Guess, double  y0Guess,
                                          double vx0Guess, double vy0Guess) {
        this.t0 = t0;
         x0 = new EstimatedParameter( "x0",  x0Guess);
         y0 = new EstimatedParameter( "y0",  y0Guess);
        vx0 = new EstimatedParameter("vx0", vx0Guess);
        vy0 = new EstimatedParameter("vy0", vy0Guess);

        // inform the base class about the parameters
        addParameter(x0);
        addParameter(y0);
        addParameter(vx0);
        addParameter(vy0);

    }

    public double getX0() {
        return x0.getEstimate();
    }

    public double getY0() {
        return y0.getEstimate();
    }

    public double getVx0() {
        return vx0.getEstimate();
    }

    public double getVy0() {
        return vy0.getEstimate();
    }

    public void addAngularMeasurement(double wi, double ti, double ai) {
        // let the base class handle the measurement
        addMeasurement(new AngularMeasurement(wi, ti, ai));
    }

    public void addDistanceMeasurement(double wi, double ti, double di) {
        // let the base class handle the measurement
        addMeasurement(new DistanceMeasurement(wi, ti, di));
    }

    public double x(double t) {
        return x0.getEstimate() + (t - t0) * vx0.getEstimate();
    }

    public double y(double t) {
        return y0.getEstimate() + (t - t0) * vy0.getEstimate();
    }

    private class AngularMeasurement extends WeightedMeasurement {

        public AngularMeasurement(double weight, double t, double angle) {
            super(weight, angle);
            this.t = t;
        }

        public double getTheoreticalValue() {
            return Math.atan2(y(t), x(t));
        }

        public double getPartial(EstimatedParameter parameter) {
            double xt = x(t);
            double yt = y(t);
            double r  = Math.sqrt(xt * xt + yt * yt);
            double u  = yt / (r + xt);
            double c  = 2 * u / (1 + u * u);
            if (parameter == x0) {
                return -c;
            } else if (parameter == vx0) {
                return -c * t;
            } else if (parameter == y0) {
                return c * xt / yt;
            } else {
                return c * t * xt / yt;
            }
        }

        private final double t;
        private static final long serialVersionUID = -5990040582592763282L;

    }

    private class DistanceMeasurement extends WeightedMeasurement {

        public DistanceMeasurement(double weight, double t, double angle) {
            super(weight, angle);
            this.t = t;
        }

        public double getTheoreticalValue() {
            double xt = x(t);
            double yt = y(t);
            return Math.sqrt(xt * xt + yt * yt);
        }

        public double getPartial(EstimatedParameter parameter) {
            double xt = x(t);
            double yt = y(t);
            double r  = Math.sqrt(xt * xt + yt * yt);
            if (parameter == x0) {
                return xt / r;
            } else if (parameter == vx0) {
                return xt * t / r;
            } else if (parameter == y0) {
                return yt / r;
            } else {
                return yt * t / r;
            }
        }

        private final double t;
        private static final long serialVersionUID = 3257286197740459503L;

    }

    private double t0;
    private EstimatedParameter x0;
    private EstimatedParameter y0;
    private EstimatedParameter vx0;
    private EstimatedParameter vy0;

}

Even without any code it states it can't find the import files :(
Help

[Norm]

see the errors in the window in the pic

No the image is very hard to read. Poor contrast. Black letters on white background would be easier to read.
Also images are useless for getting text to include in responses. Better to copy the text and paste it here.

Please edit your post and wrap your code with code tags:

[code]
**YOUR CODE GOES HERE**
[/code]

to get highlighting and preserve formatting.

[Tolls]

First (after squinting at the image) your class needs to be in a java file of the same name.
Which is what that error says.

After that, your apache maths jar seem to be missing from the build path.

[Azoth]

I did that. I place the library in alll the relevant areas.
This is what I did
Libraries->Compile Apache
Liobraries->Processor Apache
Libraries-> Run Apache
Libraries -> Compiletest Apache
Libraries ->Run test Apache

ClassPath =C:\math\commons-math.3.6.1\commons-math-3.3.6.1.jar
Same for the source Classpath

[Tolls]

If that classpath is defined in the environment variables, remove it.
You should never declare one there, no matter what some dubious websites say. It just confuses matters.

Have you fixed the classname / filename issue?

That's the start point and should remove the first error.

[Azoth]

I removed the CLASSPATH and it removed Apache-1. 3.2 altogether from the Libraries.
I saw this:
Libraries
Jdk

When I reinstalled CLASSPATH
I saw this
Libraries:
Jdk
Apache1-3.2

When compiling it gave me the error
It stated library unreadable?

[Tolls]

Where is the CLASSPATH declared?
Is it in the environment variables of your PC (or equivalent for other OSes)?

[Azoth]

ClASSPATH is in the Netbeans environment
It is in the Library module.

I have nothing set in my PC environment for it . I set one for JAVA. Should I do the same for Apache ?

[Tolls]

I don't tend to keep my libraries in a separate location.
I tend to bundle them with the project.
So, create a libs directory as part of your project and stick all the jar dependencies in there.
That way you can see, in the project, that everything is in place.

Then change any project paths to point to that directory.

Also, you still haven't said if you'd fixed the filename.

[Azoth]

Not yet.
Ok I will put external libs in the same project dir.
Anyways I created a test class called ApacheMathTest and it works so fad

[saprz]

i am new in netbeans, suffering same problems, i am trying to cod a simple query on db, it makes me to cast result which is not necessary, it dosen't know result.next() plz inform me when you found your answer.

[SurfMan]

i am new in netbeans, suffering same problems, i am trying to cod a simple query on db, it makes me to cast result which is not necessary, it dosen't know result.next() plz inform me when you found your answer.

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