free this jav for Dummies
The . is simply the ordinary member accessibility, it works in the exact same way as in all other circumstances, practically nothing special is happening in case of this.,我们可以引用当前对象的成员变量、调用当前对象的其他方法,甚至在构造方法中调用其他构造方法。这使得代码更加清晰、可读性更