1) Copying one cell into multiple cells:

Right now, you can copy one cell and paste it into multiple cells.


2) Copying multiple cells into multiple cells:

You can copy multiple cells into multiple cells if there are more cells in the clipboard.

This is how it works:

Copying from JExcel:

Select the cells you want to copy (1) with CTRL+C and paste them to the cells you want change (2) with CTRL+V.

Copying from MS Excel:

It works the same way in Excel.

Copying from Notepad or MS Word 

In Notepad (picture) or MS Word press ENTER to separate the cells like this:


After pasting the right values into the cells you wanted to change, you will see the cells modified: