Learn how to read Excel files in Java with this comprehensive tutorial. Discover techniques for adding Excel libraries to your project, creating functions to retrieve data, calling functions from different classes, and working with both .xlsx and .xls formats. Follow step-by-step instructions to create a Java Maven project, add Apache POI dependencies, set up your package and class structure, and implement functions for row counting and cell data retrieval. Master the process of creating a constructor with Excel path and sheet name arguments, and learn to call ExcelUtils functions from a separate class. Gain practical knowledge on handling different Excel file formats to enhance your Java programming skills.