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How to make MPXJ-Library show work column in mpp File using Java

I'm doing an internal Project, in Java, where i have to read an Excel and Parse it into a mpp respectively a MS Project compatible .xml file. I'm creating the file and everythings working fine.
But i want to show the columns "Work" and "ID" by default.
I can show them in MS Projects and the values are as I expect them to be, but i have to select and show them. Is there a possibility to show them by default when you open the .xml file?
I tried a lot and searched:
https://www.mpxj.org/
https://www.mpxj.org/apidocs/overview-summary.html
https://github.com/tmyroadctfig/mpxj/tree/master/net/sf/mpxj
adding columns to header in mpxj using ProjectWriter
as well as StackOverflow. But i didn't found any Information helping me out or it wasn't helpful cause methods changed and i didn't found the equivalent new ones.
this is where i fill the tasks and resources of my mpp.
if (!extractedRow.getElement().isEmpty())
{
element = contract.addTask();
element.setName(extractedRow.getElement());
element.setStart(startingDate);
element.setOutlineLevel(LookUp.Mpp_Conversion_Element_OutlineLevel());
element.setID(id++);
}
else if (!extractedRow.getWorkpackage().isEmpty())
{
workpackage = Objects.requireNonNull(element).addTask();
workpackage.setName(extractedRow.getWorkpackage());
workpackage.setOutlineLevel(LookUp.Mpp_Conversion_Workpackage_OutlineLevel());
workpackage.setID(id++);
}
else if (!extractedRow.getTask().isEmpty())
{
task = Objects.requireNonNull(workpackage).addTask();
task.setName(extractedRow.getTask());
task.setType(TaskType.FIXED_WORK);
task.setOutlineLevel(LookUp.Mpp_Conversion_Task_OutlineLevel());
task.setWork(Duration.getInstance(extractedRow.getEstimatedTime(), TimeUnit.HOURS));
task.setDuration(Duration.getInstance(extractedRow.getEstimatedTime() / 8, TimeUnit.DAYS));
task.setRemainingWork(Duration.getInstance(extractedRow.getEstimatedTime(), TimeUnit.HOURS));
task.setID(id++);
if (!extractedRow.getRole().isEmpty())
{
for (Resource resource : _project.getResources())
{
if (resource.getName().equals(_filereader.get_mapper().getMapping(extractedRow.getRole())))
{
assn = Objects.requireNonNull(task).addResourceAssignment(resource);
assn.setStart(task.getStart());
assn.setWork(Duration.getInstance(extractedRow.getEstimatedTime(), TimeUnit.HOURS));
}
}
}
}
Kind Regards

Unfortunately using an MPP file is the only way for you to specify the visual appearance of a schedule automatically when it is opened by Microsoft Project.
You have a few options:
I believe Aspose.Tasks can generate MPP files, so it may be that as part of that you can configure the layout you want
As you are already working with Excel you may want to consider using VBA which would allow you to both extract the data you need from Excel, populate the schedule in MS Project and configure the layout of the schedule.
Finally, if you want to use MPXJ, when you generate the MSPDI file and import it into Microsoft Project you are given some options about how the file is opened (as a new schedule, append to an existing schedule, update an existing schedule). If you create an empty "template" MPP file with the visual layout you require, using the append or update options when you open the XML file and selecting the template file as the target should give you a finished file using the data you've generated with the visual layout you need.

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I have developed an ExcelReader/Writer program that is intended to be ran on other computers. In this program, it takes in an excel.xls of hard data, reads it and writes it in a formatted way to an excel.xlsx file, and then saves it in a directory "CoC-Forms".
To reduce the steps to run my program, I have included the empty .xlsx file that it writes to in the project. However, when exporting it to an executable jar (to run on other computers), I seem to be having trouble accessing this empty form. I know this is probably a very simple answer, but I have been stuck for over a full work day and it has completely halted my progress.
Here is a snippet of my environment. On the left is my Project directory in Intellij (CoC.xlsx is the empty form) and the highlights on the right are where I am attempting to access the file and where the error is happening respectively.
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//fileFrom = new File(s + "/out/production/XML Reader/CoC.xlsx");
//fileFrom = new File("/XML Reader/out/production/XML Reader/CoC.xlsx");
//fileFrom = new File("CoC.xlsx");
//fileFrom = new File(ExcelWriter.class.getResource("CoC.xlsx").getPath());
CodeSource src = ExcelWriter.class.getProtectionDomain().getCodeSource();
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URL url = new URL(src.getLocation(), "CoC.xlsx");
fileFrom = new File()
System.out.println(url);
} else {
JOptionPane.showMessageDialog(null,"Failed");
} */
fileFrom = new File(new File("."), "CoC.xlsx");

I solved my problem by having people download the whole project folder, file referencing with a ../../ from point of execution, and then going deeper into the file path to find the location at which I placed the file. Choppy, but it works and solved the problem.

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I am using Java and the javafx clipboard. Some sample code:
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List<File> files = clipboard.getFiles();
// destDir is a File, the target directory.
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Thanks,
Luca

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if (editorInput instanceof IFileEditorInput)
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// TODO handle file
}