Algorithm to show how far away a value is from another

Disclaimer: This is a very very difficult question about mathematics and algorithms (in my opinion) – so respect to anyone who makes this. I admire you. I would like to evaluate the performance of my …

POIXMLException when updating excel file with apache-poi

When I try overwrite existing excel file, I get this error message: Exception in thread “main” org.apache.poi.ooxml.POIXMLException: OOXML file structure broken/invalid – no core document …

Apache POI – Is there a way to count occurrence of a string in a pivot table?

I am using version 4.1.2 of Apache Poi and I have this dataset: String[] headers = new String[] { “Company”, “Status” }; Object[][] sheetData = { {“Company 1”, “OK”}, …

How to convert a PDF to a JSON/EXCEL/WORD file?

I need to get data from the pdf file with its header for further comparing with DB data I tried to use the pdfbox , google vision ocr , itext, but all libraries gave me a row without structure and …

Apache POI java.lang.NoSuchMethodError

My code is below: import java.util.*; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.InputStream; import java.io.IOException; import org.apache.poi.ss….

Using Apache POI how to read a specific excel column

I’m having a problem in excel while using Apache POI. I can read across rows, but sometimes I’m in a situation where I would like to read a particular column only. So is it possible to read any …

How to rotate text in a spreadsheet cell using Apache POI?

How can I rotate the text within an HSSFCell class of Apache POI?