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soo ao long tian1,111 Points
can explain more about public and private?
i understand the difference between public and private, but why do we need private? is this a way to prevent hacker from modifying our code? why don't we just use public? so we can easily retrieve data and shorten those code without creating a method to get them
Simon Coates28,693 Points
The less open a class is, the less other classes can reach into it. A small public interface for a class simplifies access to that class, while ensuring that values in that class are not exposed and able to be put into an inconsistent state. The relevant concepts are information-hiding, encapsulation and coupling.