java-final关键字

首先以段程序开始：

 

public class FinalTest{ public static void main(String[] args){ People people = new People(); // people.address = new Address(); people.address.name = "guangan"; System.out.println(people.address.name); } } class People{ //Address address = new Address(); final Address address = new Address(); } class Address{ String name = "chengdu"; }

这个程序用关键字fianl修饰了address，从本质上讲就是保证address指向的地址不能被更改，即不能new一个新地址。

但是其指向的地址空间内的属性可以被改变。如上程序中address.name = "guangan";这是可以的。