How can I use the captured group in the same regex

Question

mFoo = foo;
mBar = bar;
// convert to
this.foo = foo;
this.bar = bar;

How to use a regex to handle this substitution? Please help. Here is the method I used in Android Studio (IntelliJ IDEA) Edit -> Find -> Replace in Path

Text to find: m([A-Z])([A-Za-z0-9]+) = L$1$2
Replace with: this\.L$1$2 = L$1$2

Update

L above is a typo. It should be \L according to JetBrains' document

Answer 1

Thanks to Simona R., a simple example in Android Studio.

I want to replace

parentFragmentManager.let { dialogFragment.show(it, AlertDialogFragment.TAG) } 

to

dialogFragment.show(parentFragmentManager, AlertDialogFragment.TAG) 

in several classes so that two parameters may change.

Then I use replacement with $1 and $2:

parentFragmentManager.let \{ (\w+).show\(it, (\w+).TAG\) \}
$1.show\(parentFragmentManager, $2.TAG\)