How do I make multicolor text in the same line in word using Apache PO in JavaI?

Question

I need to generate a word document using Apache POI that has multiple colors of text in one single line and then ends with a horizontal line break. Like in the example bellow:

What I want

I tried to use mainText.setBorderBetween(Borders.BASIC_THIN_LINES); to get a horizontal line and it worked but the horizontal line is pushed all the way down and not centered properly. I tried using:

mainTextRun.setColor("FFA500"); mainTextRun.setText("text 1"); mainTextRun.setColor("008000"); mainTextRun.setText("text 2"); mainTextRun.setColor("0000FF"); mainTextRun.setText("text 3");

But it did not produce the desired text as it kept skipping lines as seen here:

Pain.

Answer 1

I guess your mainText is a XWPFParagraph and your mainTextRun are multiple XWPFRun created in that XWPFParagraph. Then the following small Minimal, Reproducible Example works and produces the Word document shown below.

import java.io.FileOutputStream;
import org.apache.poi.xwpf.usermodel.*;

public class CreateWordParagraphBorderAndColoredTextRuns {

 public static void main(String[] args) throws Exception {

  XWPFDocument document = new XWPFDocument();

  XWPFParagraph mainText = document.createParagraph();
  mainText.setBorderBottom(Borders.BASIC_THIN_LINES);
  
  XWPFRun mainTextRun = mainText.createRun(); 
  mainTextRun.setColor("FFA500"); mainTextRun.setText("text 1 "); 
  mainTextRun = mainText.createRun();
  mainTextRun.setColor("008000"); mainTextRun.setText("text 2 "); 
  mainTextRun = mainText.createRun();
  mainTextRun.setColor("0000FF"); mainTextRun.setText("text 3 ");

  mainText = document.createParagraph();

  FileOutputStream out = new FileOutputStream("./CreateWordParagraphBorderAndColoredTextRuns.docx");
  document.write(out);
  out.close();
  document.close();

 }
}

Result: