Code to Merge Cells In Excel using Java. Further details on this topic are available here: https://kb.aspose.com/cells/java/how-to-merge-cells-in-excel-using-java/

Merge Cells In Excel using Java.java

import com.aspose.cells.License;
import com.aspose.cells.Workbook;
import com.aspose.cells.Worksheet;
import com.aspose.cells.Cells;

public class MergeCellsInExcelUsingJava {
    public static void main(String[] args) throws Exception { // main method to merge cells in Excel worksheet using Java

        // Instantiate the license to avoid trial restrictions and watermark after merging cells
        License CellsMergingLicense = new License();
        CellsMergingLicense.setLicense("Aspose.Cells.lic");

        // Create new Excel workbook
        Workbook workbook = new Workbook();

        // Get first worksheet
        Worksheet worksheet = workbook.getWorksheets().get(0);

        // Create cells class object
        Cells cells = worksheet.getCells();

        // Merge cells
        cells.merge(5, 2, 2, 3);

        // Enter a sample value
        worksheet.getCells().get(5, 2).putValue("Sample value");

        // Save output containing merged cells
        workbook.save("MergedCells.xlsx");
    }
}