Sample Vision Code Error

I have shown the line in red below that gives us the following error in NetBeans:

unreported exception; must be caught or declared to be thrown

The code works and runs on CRIO with the test file image.

Any help would be appreciated.

package edu.wpi.first.wpilibj.templates;

import edu.wpi.first.wpilibj.SimpleRobot;
import edu.wpi.first.wpilibj.Timer;
import edu.wpi.first.wpilibj.image.BinaryImage;
import edu.wpi.first.wpilibj.image.ColorImage;
import edu.wpi.first.wpilibj.image.CriteriaCollection;
import edu.wpi.first.wpilibj.image.NIVision.MeasurementType;
import edu.wpi.first.wpilibj.image.NIVisionException;
import edu.wpi.first.wpilibj.image.ParticleAnalysisReport;
import edu.wpi.first.wpilibj.image.RGBImage;

 * Sample program to use NIVision to find rectangles in the scene that are illuminated
 * by a red ring light (similar to the model from FIRSTChoice). The camera sensitivity
 * is set very low so as to only show light sources and remove any distracting parts
 * of the image.
 * The CriteriaCollection is the set of criteria that is used to filter the set of
 * rectangles that are detected. In this example we're looking for rectangles with
 * a minimum width of 30 pixels and maximum of 400 pixels. Similar for height (see
 * the addCriteria() methods below.
 * The algorithm first does a color threshold operation that only takes objects in the
 * scene that have a significant red color component. Then removes small objects that
 * might be caused by red reflection scattered from other parts of the scene. Then
 * a convex hull operation fills all the rectangle outlines (even the partially occluded
 * ones). Finally a particle filter looks for all the shapes that meet the requirements
 * specified in the criteria collection.
 * Look in the VisionImages directory inside the project that is created for the sample
 * images as well as the NI Vision Assistant file that contains the vision command
 * chain (open it with the Vision Assistant)
public class CameraTest extends SimpleRobot {
    AxisCamera camera;          // the axis camera object (connected to the switch)
    CriteriaCollection cc;      // the criteria for doing the particle filter operation
    public void robotInit() {
        camera = AxisCamera.getInstance("");  // get an instance ofthe camera
        cc = new CriteriaCollection();      // create the criteria for the particle filter
        cc.addCriteria(MeasurementType.IMAQ_MT_BOUNDING_RECT_WIDTH, 30, 400, false);
        cc.addCriteria(MeasurementType.IMAQ_MT_BOUNDING_RECT_HEIGHT, 40, 400, false);

    public void autonomous() {
        while (isAutonomous() && isEnabled()) {
            try {
                 * Do the image capture with the camera and apply the algorithm described above. This
                 * sample will either get images from the camera or from an image file stored in the top
                 * level directory in the flash memory on the cRIO. The file name in this case is "10ft2.jpg"
                ColorImage image = camera.getImage();     // comment if using stored images
                //ColorImage image;                           // next 2 lines read image from flash on cRIO
                //image =  new RGBImage("/10ft2.jpg");
                BinaryImage thresholdImage = image.thresholdRGB(25, 255, 0, 45, 0, 47);   // keep only red objects
                BinaryImage bigObjectsImage = thresholdImage.removeSmallObjects(false, 2);  // remove small artifacts
                BinaryImage convexHullImage = bigObjectsImage.convexHull(false);          // fill in occluded rectangles
                BinaryImage filteredImage = convexHullImage.particleFilter(cc);           // find filled in rectangles
                ParticleAnalysisReport] reports = filteredImage.getOrderedParticleAnalysisReports();  // get list of results
                for (int i = 0; i < reports.length; i++) {                                // print results
                    ParticleAnalysisReport r = reports*;
                    System.out.println("Particle: " + i + ":  Center of mass x: " + r.center_mass_x);
                System.out.println(filteredImage.getNumberParticles() + "  " + Timer.getFPGATimestamp());

                 * all images in Java must be freed after they are used since they are allocated out
                 * of C data structures. Not calling free() will cause the memory to accumulate over
                 * each pass of this loop.
//            } catch (AxisCameraException ex) {        // this is needed if the camera.getImage() is called
//                ex.printStackTrace();
            } catch (NIVisionException ex) {

     * This function is called once each time the robot enters operator control.
    public void operatorControl() {
        while (isOperatorControl() && isEnabled()) {

Look right below…

//            } catch (AxisCameraException ex) {        // this is needed if the camera.getImage() is called
//                ex.printStackTrace();

The compiler is complaining that you’re not catching a possible exception. Uncommenting the above lines should get your code to work. If you want to learn more about exceptions, check out Oracle’s lesson or any one of many other internet resources.

Thank you for your help. Not sure how I missed this in the code!