Why isn't the "this" keyword necessary in constructors while it is in regular methods?

Answer 1

If it is unambiguous that the name refers to the property, we can leave it out.
If the parameter name in the constructor happens to have the same name as the property, it is ambiguous and the compiler "assumes" you mean the parameter name.

Have a look at the 1st example here:
https://docs.oracle.com/javase/tutorial/java/javaOO/thiskey.html

Answer 2

Lisa Also I guess it applies because the exact role of the constructor is to have access to the instant variables by default and it makes sense 🤔
Thank you