On line 11 the foo() method is called and beside the parameter value it shows the parameter name which i don't want and also there is a weird pink box along with the parameter name. How do i get rid of this. Tried many things on settings and found no solution. Any help is appreciated.
On
These are 2 separate things:
(1) Inline Hints
In NetBeans 12.2 (and I am I assuming it's the same for your version) there is an option from the main menu:
View > Show Inline Hints
This causes those items in a smaller font to be displayed/hidden, such as your data: hint.
(2) Autocompletion Hints
The red/pink borders are related to text which has been auto-completed for you by NetBeans. I believe if you just type somewhere else then that border disappears (because you have implicitly "accepted" the autocomplete suggestion).
In menu:
View | Show Inline Hints