PDF documents are widely used in reports, contracts, textbooks, and exams. Often, we need to search for specific text and highlight it —for example, marking key terms in reports, highlighting important clauses in contracts, or extracting certain content for analysis. Manual processing is time-consuming and prone to errors, so automating text search and highlighting in PDFs is essential. In this guide, we’ll demonstrate four practical ways to find and highlight text in PDF files using Java : Highlight text on a single page Highlight text within a specific rectangular area Highlight text throughout the entire document Highlight text using regular expressions Installing the Required Library We use Spire.PDF for Java , a powerful PDF processing library that allows you to load PDFs, search text, edit content, and highlight text.…