This article guides on how to lock cells in Excel using Java. It has details to set the IDE, a list of steps, and a sample code for cell protection in Excel using Java. You will learn to lock cells and protect the sheet using a few API calls only.

Steps to Lock Certain Cells in Excel using Java

1. Set the IDE to use Aspose.Cells for Java to lock cells
2. Import the necessary methods and classes
3. Set the paths for the license, the input Excel file, and the output Excel file
4. Load the input Excel file into the Workbook and access the target sheet
5. Make everything editable on the selected sheet
6. Lock all the target cells by creating the appropriate style and applying it
7. Enforce the protection of the sheet using the Protect method
8. Save the output Excel file with a protected sheet and locked cells

The above steps summarize how to lock specific cells in Excel using Java. Load the workbook, access the sheet and make everything editable or unlocked on the sheet. Finally, lock the target cells using the setLocked() method in the Style class.

Code to Lock Selected Cells in Excel using Java

The above sample code has demonstrated how to lock certain cells in Excel using Java. Making everything editable or unlocked in the beginning is an optional step that you may skip if not required. Note that enforcing protection to the sheet is necessary despite setting the IsLocked property to True for the target cells.

This article has taught us the process to lock cells and protect the sheet. To add a check mark in an Excel file, refer to the article Add check mark in Excel using Java.