This quick tutorial guides you on how to unhide multiple sheets in Excel using Java. You will get all the details related to the configuration of the development environment, a step-wise logic to write the program, and a runnable sample code that demonstrates the process to unhide all sheets using Java. Once you show all the hidden sheets, you may save the original file or save it as a new XLSX, XLS, ODS, or any other supported format.

Steps to Unhide All Sheets in Excel using Java

1. Establish the environment to use Aspose.Cells for Java to unhide sheets
2. Load the source Excel file with hidden sheets into the Workbook class object
3. Get access to the worksheets collection in the workbook to show hidden sheets
4. Parse through all the sheets in the loaded workbook
5. Check the visible status of each sheet in the collection
6. Set the visibility flag to true if not set earlier
7. Save the resultant workbook to a stream or a file on the disk

These steps describe the process of configuring and writing a program to show hidden sheets in Excel using Java. In the beginning, the source Excel file is loaded with a collection of sheets out of which some might be hidden and each sheet has the IsVisible flag property false. All the sheets are parsed and this flag is customized to show or hide the particular sheet.

Code to Unhide Sheet using Java

The above code demonstrates the process to unhide spreadsheet using Java such that all the worksheets in the workbook are traversed to check the IsVisible flag and if found false, that is set to true. There is an optional step that calls Workbook.unprotect() method to unprotect the workbooks with or without a password however you may skip it for showing the hidden sheets but for other operations you may need it. The worksheets collection returns an object and we need to type cast it to the Worksheet class in order to access its desired properties.

In this tutorial, we have learned to unhide all or selected sheets based on some criteria. If you want to learn the process to save the resultant workbook as a PDF, refer to the article on how to generate PDF from Excel in Java.