encapsulation

How can I use the set and get methods, and why should I use them? Are they really helpful? And also can you give me examples of set and get methods? Set and Get methods are a pattern of data encapsulation. Instead of accessing class member variables directly, you define get methods to access these variables, and set methods to modify them. By encapsulating them in this manner, you have control over the public interface, should you need to change the inner workings of the class in the future. For example, for a member variable: Integer x; You might have methods: Integer getX(){ return x; } void

First off, I have read through a list of postings on this topic and I don't feel I have grasped properties because of what I had come to understand about encapsulation and field modifiers (private, public..ect). One of the main aspects of C# that I have come to learn is the importance of data protection within your code by the use of encapsulation. I 'thought' I understood that to be because of the ability of the use of the modifiers (private, public, internal, protected). However, after learning about properties I am sort of torn in understanding not only properties uses, but the overall

I have a struct that has inner mutability. use std::cell::RefCell; struct MutableInterior { hide_me: i32, vec: Vec<i32>, } struct Foo { //although not used in this particular snippet, //the motivating problem uses interior mutability //via RefCell. interior: RefCell<MutableInterior>, } impl Foo { pub fn get_items(&self) -> &Vec<i32> { &self.interior.borrow().vec } } fn main() { let f = Foo { interior: RefCell::new(MutableInterior { vec: Vec::new(), hide_me: 2, }), }; let borrowed_f = &f; let items = borrowed_f.get_items(); } Produces the error: error[E0597]: borrowed value does not live long

Suppose I have a method that returns a read-only view into a member list: class Team { private List < Player > players = new ArrayList < > (); // ... public List < Player > getPlayers() { return Collections.unmodifiableList(players); } } Further suppose that all the client does is iterate over the list once, immediately. Maybe to put the players into a JList or something. The client does not store a reference to the list for later inspection! Given this common scenario, should I return a stream instead? public Stream < Player > getPlayers() { return players.stream(); } Or is returning a stream