Having this error message when I try to open one of the files in my project on Eclipse: Could not open editor for resource: .....java.lang.NullPointerException

Please add the code after this one. The code has to be in java eclipse. Please add comments in what you are doing. I'll appreciate it public class Computer { private String ModelNumber; private String BrandName; private String manufacturingDate; private int NumberOfCores;  //Constructor a public Computer() {} //Construct a computer object with model, BrandName, NumberOfCoresComputer (String ModelNumber, String BrandName, String manufacturingDate, int NumberOfCores){    this.ModelNumber=ModelNumber;    this.BrandName=BrandName;    this.manufacturingDate=manufacturingDate;    this.NumberOfCores=NumberOfCores;}//generate getters/setterspublic String getModel() {    return ModelNumber;} public void setModel(String ModelNumber) {    ModelNumber = ModelNumber;} public String getBrandName() {    return BrandName;} public void setBrandName(String brandName) {    BrandName = brandName;} public String getManufacturingDate() {    return manufacturingDate;} public void setManufacturingDate(String…

For this problem, you are given a java code FlipAgain.java. Copy the .java file to your project folder. Open the file in your IDE. You have to edit this code to make it work. You can see that the code I have given you does not compile. So, you won’t be able to run it without fixing the code. Perform the following tasks in order. The code as given does not compile. Notice that the while loop tests if again.equals("y"), but the variable again doesn't have a value at first. Give it a value so that the code will compile and the loop will run at least once. Now that the program is working, change the loop from a while loop to a do-while loop. Make sure it still works. What happens if you delete what you added in step 1? Change the line back to just String again; Does the program still work? Why or why not? (Answer in a comment in the program.) After completing the above three tasks submit the final code, where you converted the while loop to do-while loop.     FlipAgain.java ----->…

Assume the base package for an Eclipse project is edu.westga.cs1301.drinks and that you are writing tests for the dispense method of a DrinkMachine class. Use this information to answer the following questionWhat should you name your test class?

There are two parts to this practice exercise! (NOT GRADED) Just for you to continue working on your skills over this weekend.  Part I:  Now follow the instructions to create a new class named Pizza: Open Eclipse. Create a New  -> Java project.  Name it Chap6-PizzaPalace  and click Finish and OK. Next, create a New -> Class.  Name it Pizza  and DO NOT check the first checkbox under "Which method stubs would you like to create?" and click Finish. Delete the green comment text in the file "Pizza.java" Add a comment at the top // (your name) Add another comment at the top // Practice 6 Study the UML provided with this practice problem. Code class Pizza according to the UML given, be sure to include all data fields, methods, and variables as specified.   (USE THE UML DIAGRAM ATTACHED TO BASE/structure of your code off of for Part 1) Part 2:  Now follow the instructions to create a new class named PizzaPalace Open Eclipse. Select the project Chap6-PizzaPalace in the…

Please help using java