Working with .xls files

Hi Team,

is there a way by which i can read and write data in .xls files? I have seen there are add ons for .xlsx file but are there any to work with .xls format files?

I am getting this error when I use the addons meant for .xlsx files with .xls files

“java.lang.NullPointerException at java.base/java.lang.String.replace(”