Word.java

import com.spire.doc.Document;
import com.spire.doc.FileFormat;
import com.spire.doc.documents.TextSelection;

import java.awt.*;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class Word{
    public static void main(String[] args) {

        String input = "/Users/rifky/Desktop/replaceWithText.docx";
        String output = "/Users/rifky/Desktop/out/replaceWithText.docx";
        String findText = "then";
        String replacementWord = "kemudian";
        //load Word document
        Document document = new Document();
        document.loadFromFile(input, FileFormat.Docx);

        //replace the text
        document.replace(findText, replacementWord, false, true);

        //highlight the replaced text
        TextSelection[] textSelections = document.findAllString(replacementWord, false, true);

        //set highlight
        for (TextSelection selection : textSelections) {
            selection.getAsOneRange().getCharacterFormat().setHighlightColor(Color.WHITE);
        }

        //save the document
        document.saveToFile(output,FileFormat.Docx);
    }

    public static String readTextFromFile(String fileName) throws IOException{
        StringBuffer sb = new StringBuffer();
        BufferedReader br = new BufferedReader(new FileReader(fileName));
        String content = null;
        while ((content = br.readLine()) != null) {
            sb.append(content);
        }
        return sb.toString();
    }
}