Make column read-only using apache poi

Question

I am using apache-poi for generating the excel file. I need to make the 4th column read-only and the remaining 2 columns will be editable by the user.

I am using

Answer 1

CellRangeAddressList addressList = new CellRangeAddressList(firstRow, lastRow, firstCol, lastCol);
        DVConstraint dvConstraint = DVConstraint.createExplicitListConstraint(new String[] { "ReadOnlyCell" });
        HSSFDataValidation dataValidation = new HSSFDataValidation(addressList, dvConstraint);
    dataValidation.setSuppressDropDownArrow(true);

    dataValidation.setEmptyCellAllowed(false);
    dataValidation.createErrorBox("Error", "Cell can not be editable");
    spreadsheet.addValidationData(dataValidation);