求助大佬？我想知道为什么一定要用初始化？

hello!!! Why is the following code necessary?

public void initialize(String name) {
       this.name = name;
   }

Why not use the new method directly, the level 4 task shows that the program can work without the initialize method, like this:

public String name;

Brother in real life, almost no variable is there with public keyword, it is with private keyword so that it can only be accessed inside the class. And it is necessary to check whether the value that you are assigning to the variable is valid or not. For example : public int age; now I can initialize this value as : age = -20; this is obviously wrong no one is allowed to have a negative age because it just can't be true. So, we use private access modifier before the variable name and assign the value to the variable inside the class after the check (if it is required). and hence we require a public method to initialize the variable because we can not directly access the varible inside another class.

Thanks, my bro.