Count number of rows in an excel file in Java

In this tutorial, we will learn how to count number of rows in an excel file in Java with a simple approach.

Counting the number of rows in an Excel file is a common task in many data processing and analysis applications. Understanding how to accomplish this using Java can significantly enhance your ability to automate and manage data-driven tasks. Transitioning from basic file handling to more advanced data manipulation requires familiarity with specific libraries that provide the necessary functionality.

How to count number of rows in an excel file an excel file in Java

Let us understand the concept in detail:

First and foremost, it is essential to select a robust library for Excel manipulation. The Aspose.Cells library is a powerful tool designed for managing Excel files with ease. Moreover, it supports a wide range of features, making it an excellent choice for reading, writing, and manipulating Excel files programmatically.

To begin with, ensure you have the Aspose.Cells library included in your project. You can do this by adding the appropriate Maven dependency or downloading the library from the Aspose website. Once set up, the next step involves writing Java code to open an Excel file and count the number of rows within it.

Implementing code in Java

import com.aspose.cells.*;

public class CountRowsInExcel {
    public static void main(String[] args) {
        try {
            // Set the Aspose.Cells license (ensure you have a valid license file)
            License license = new License();
            license.setLicense("src/main/resources/License.lic");

            // Load the Excel file
            Workbook w = new Workbook("src/main/resources/input.xlsx");

            // Access the first worksheet (index 0)
            Worksheet sheet = w.getWorksheets().get(0);

            // Get the maximum row index that contains data
            int maxRow = sheet.getCells().getMaxDataRow();

            // Since row indices are zero-based, the number of rows is maxRow + 1
            int numberOfRows = maxRow + 1;

            // Print the number of rows
            System.out.println("Number of rows in the worksheet: " + numberOfRows);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Detailed explanation of code

To begin with, this code initializes the Aspose.Cells library by setting the license file. This step is crucial as it ensures you are using a licensed copy of the library, thereby unlocking its full potential.

Next, the code loads the Excel file into a Workbook object. This object represents the entire Excel file, allowing access to its contents. Specifically, the code accesses the first worksheet in the workbook using the get method on the WorksheetCollection.

Following this, the code retrieves the maximum row index that contains data by calling getMaxDataRow on the Cells collection of the worksheet. Since row indices are zero-based, the actual number of rows is the maximum row index plus one.

Finally, the code prints the number of rows, providing a clear and concise output of the total row count in the worksheet.

Output

Number of rows in the worksheet: 8