JavaFX NullPointer Exception Location is required

Question

I have an FXML file that is in a separate package. this answer is close but it is located in the same package.

the what confuses me is

1. Where is this path /src/resources/.fxml that some of the answers reference

2. How do I "copy" my fxml code into it. This is the line of code that is getting me Nullpointerexception: Location is Required

   root = FXMLLoader.load(getClass().getResource("IMSView/AppView.fxml"));
   

I have tried it with

root = FXMLLoader.load(getClass().getResource("/IMSView/AppView.fxml"));

Still get the same failure.

I am very new to java and I know I am doing something wrong. I could get this project to run when everything was in one file path. Now that I have added packages I cannot get the fxml to load.

Thanks for your time.

EDIT

I am using netbeans The Main method ins in IMS.java The FXML that I want to load is in a package called IMSview and is name AppView.fxml Project files

My Code

    /*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package ims;

import IMSModel.Product;
import IMSModel.Part;
import IMSView.AddProductController;
import IMSView.AppViewController;
import IMSView.AddPartController;
import java.io.IOException;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.BorderPane;
import javafx.stage.Modality;
import javafx.stage.Stage;


/**
 *
 * @author DBarnett
 */
public class IMS extends Application {

    private Stage primaryStage;
    private Stage window;
    private BorderPane rootLayout;
    private ObservableList<Part> PartData = FXCollections.observableArrayList();
    private ObservableList<Product> ProductData = FXCollections.observableArrayList();

    public IMS() {

        // Add some sample data
//       PartData.add(new InHouse(1,"Silly Cow",1,23));
//       ProductData.add(new OutSourced(2"dog",2,3));
    }

    /**
     * Returns the data as an observable list of Parts.
     *
     * @return
     */
    public ObservableList<Part> getPartData() {
        return PartData;
    }

    public ObservableList<Product> getProductData() {
        return ProductData;
    }

    @Override
    public void start(Stage primaryStage) throws IOException {
         window = primaryStage;
         Parent root;
        root = FXMLLoader.load(getClass().getResource("IMSView/AppView.fxml"));

        Scene scene = new Scene(root);
        primaryStage.setTitle("IMS");
        primaryStage.setScene(scene);
        primaryStage.show();

//        this.primaryStage = primaryStage;
//        this.primaryStage.setTitle("Inventory Management System");
        window.setOnCloseRequest(e -> {
            e.consume();
            closeProgram();
        });