File APIs for Word/Excel/PowerPoint/PDF

  PDF forms are widely used for registration forms, applications, surveys, contract confirmations, and business approval processes. Unlike ordinary PDF documents, interactive PDF forms contain fields such as text boxes, checkboxes, radio buttons, combo boxes, and list boxes that can be filled programmatically. When generating large numbers of application forms, importing customer data, or exporting completed forms from a business system, filling each form manually is inefficient. With Java, form fields can be read and populated automatically as part of a backend service, desktop application, or batch-processing workflow. This article explains how to: Read form fields from a PDF Fill text boxes Select radio button options Check or clear checkboxes Select items in list boxes and combo boxes Populate fields based on their names Save the completed PDF document This method applies to PDF files that contain interactive form fields. It does not work directly with scanned PDFs, image-based...