Both final and const prevent a variable from being reassigned (similar to how final works in java or how const works in javascript). The quote above is better in context. The reason it gives is that interface variables are intended to be java constants.
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Final 的作用 final 是 java 中的一个关键字，简而言之，final 的作用意味着“这是无法改变的”。不过由于 final 关键字一共有三种用法，它可以用来修饰变量、方法或者类，而且在修饰不同的地方时，效果、.
But i see that you can change the value in the constructor / methods of the class.
Use public final static string when you want to. In java we use final keyword with variables to specify its values are not to be changed. How are they different ? The quote was just elaborating on why such a constant would be static and final.
The difference has to do with how memory is allocated. I'm always confused between static and final keywords in java. Again, if the variable is 知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区.
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