txtmark | Yet another markdown processor for the JVM

The Context

I've been working on a program that gets a pdf, highlights some words (via pdfbox Mark Annotation) and saves the new pdf.

For this I extend the PDFTextStripper class, in order to override the writeString() method and get the TextPositions of each word (box), so that I know exactly where the text is in the PDF doc in terms of coordinates (TextPosition object provides me the coordinates of each word box). Then, based on that, I draw a PDRectangle highlighting the word I want to.

The Problem

It works perfectly for all the documents I've tried so far, except for one that the positions I'm getting from TextPostions seem to be wrong, leading to wrong highlights.

This is the original document:
https://pdfhost.io/v/b1Mcpoy~s_Thomson.pdf

This is the document with a highlighting in the very first word box writeString() provides me, with setSortByPosition(false), which is MicroRNA:
https://pdfhost.io/v/V6INb4Xet_Thomson.pdf
It should highlight MicroRNA, but it is highlighting a blank space above it (pink HL rectangle).

This is the document with a highlighting in the very first word box writeString() provides me, with setSortByPosition(true), which is Original:
https://pdfhost.io/v/Lndh.j6ji_Thomson.pdf
It should highlight Original, but it is highlighting a blank space at the very beginning of the PDF document (pink HL rectangle).

This PDF might contain something that PDFBox struggles to get the right positions, I suppose, or this may be a sort of a bug in PDFBox.

Technical Specification:

PDFBox 2.0.17
Java 11.0.6+10, AdoptOpenJDK
MacOS Catalina 10.15.4, 16gb, x86_64

Coordinates Values

So for instance for the start and end of the MicroRNA word box, the TextPosition coordinates writeString() gives me are:

M letter

problem occurs while filing it is saving data amazingly and on retrieving the records on DataGridView here is the code i am trying but it is also showing the Last Value of column and 1st value of next column like this is the info in file and data from file is like:

i creating a simple java radio button project. if i checked the radio button result diplayed on the textbox 1.if i uncheck the radio button result need to be display 0.if i uncheck result didn't display 0. what i tired so far i attached below.

In a Nutshell

I've been working on a program that gets a pdf, highlights some words (via pdfbox Mark Annotation obj) and saves the new pdf.

I'd like my highlighted words to show a tooltip with some small description on it, like a hint.

For instance, I want that on my pdf, the highlighted word activated shows the tooltip important word found when I stop the mouse over it.

This is the original test pdf.

My Code

With a couple of abstractions, in a nutshell, I have:

In a Nutshell

I've been working on a program that gets a pdf, highlights some words (via pdfbox Mark Annotation) and saves the new pdf.

In order to these annotations be visible on some viewers like pdf.js, it's needed to call the pdAnnotationTextMarkup.constructAppearances() before adding the mark annotation into the page Annotation list.

However, by doing so, I get an OutOfMemoryError when dealing with huge documents that would contain thousands of mark annotations.

I'd like to know if there's a way to prevent this from happening.

(this is a kind of a sequel of this ticket, but that's not much relevant for this one)

Technical Specification:

PDFBox 2.0.17
Java 11.0.6+10, AdoptOpenJDK
MacOS Catalina 10.15.2, 16gb, x86_64

My Code

I'm trying to split a text by br tags.

I have this tag :

My use case is to have a button like so on a pdf page (really to add them to existing pages but for now I just want to see it work on anything).

In my program I allow the user to select a student record from the list box, when they hit the edit button a new form opens. This form displays the id and mark of the student they have selected. I am required to let the user edit that mark and update the list box. I am having trouble letting the user edit, and would appreciate any advise on this. (I am having trouble figuring out what to do when i have the users data inside the edit form) Thanks.

I am not allowed to use LINQ, so a solution or advice on how to do it without it would be greatly appreciated.

Main form when the edit button is clicked:

In my program I allow the user to select a student record from the list box, when they hit the edit button a new form opens. This form displays the id and mark of the student they have selected. I am required to let the user edit that mark and update the list box. I am having trouble letting the user edit, and would appreciate any advice on this. (I am having trouble figuring out what to do when I have the user's data inside the edit form)

I'm not allowed to use LINQ, so a solution or advice on how to do it without it would be greatly appreciated.

Main form: