need a hand to understand the code

[Dana Horst]

Guys,I apologize forehead if i ask silly questions.

I have two classes, class Pet and PetMaster. I have a few quiestions what means what, please look at comments :

public class Pet {
int age;
float weight;
float height;
String color;
public void sleep(){
System.out.println(
"Good night, see you tomorrow");
}
public void eat(){
System.out.println(
"I’m so hungry…let me have a snack like nachos!");
}
public String say(String aWord){ //what is the meaning of aWord here? is it just a name of variable aWord type String?
String petResponse = "OK!! OK!! " +aWord;
return petResponse;
}
}

public class PetMaster {
public static void main(String[] args) {
String petReaction;
Pet myPet = new Pet();
myPet.eat();
petReaction = myPet.say("Tweet!! Tweet!!");
System.out.println(petReaction);
myPet.sleep();
}
}

as a result, i get :

I’m so hungry…let me have a snack like nachos!
OK!! OK!! Tweet!! Tweet!!
Good night, see you tomorrow

Question 1: in the main class i didnt called aWord (i did myPet.say),why then i get such a result? (OK!! OK!! Tweet!! Tweet!!). could you please explain how petReaction connected with method "say" from class Pet?
Question 2: i think the output is what follows System.oupt.println. why do i get output from the myPet.eat();

Thank you!
Dana

[Keith Lynn]

aWord in that method is what is called a formal parameter. When the method is called, you send a corresponding actual parameter, whose value gets copied into aWord. aWord can then be used in the method.

The reason you get output when you call myPet.eat() is that method contains a System.out.println statement.

[Dana Horst]

Brilliant! I got it!Thank you very much!