Clarification on `this` keyword in Scala

I'm new to scala, and is trying to follow the tutorial on the documentation. I understand that this is used to 'access' a class' methods or fields, but on this code block, this is called as without any 'option' but it default to call the 'toString' method.

Here's the code block i'm talking about

    class Person(var firstName: String, var lastName: String) {        println("the constructor begins")        // 'public' access by default      var age = 0        // some class fields      private val HOME = System.getProperty("user.home")        // some methods      override def toString(): String = s"$firstName $lastName is $age years old"        def printHome(): Unit = println(s"HOME = $HOME")          def printFullName(): Unit = println(this)         printHome()      printFullName()      println("you've reached the end of the constructor")    }  

Output in REPLL:

  scala> val p = new Person("Kim", "Carnes")  the constructor begins  HOME = /Users/al  Kim Carnes is 0 years old  you've reached the end of the constructor  p: Person = Kim Carnes is 0 years old      

https://stackoverflow.com/questions/65768252/clarification-on-this-keyword-in-scala January 18, 2021 at 10:56AM