java - 为什么接口(interface)变量默认是静态的和最终的？

Question

为什么Java中的接口(interface)变量默认是static和final的？

Answer 1

来自 Philip Shaw 的 Java 界面设计常见问题解答:

Interface variables are static because Java interfaces cannot be instantiated in their own right; the value of the variable must be assigned in a static context in which no instance exists. The final modifier ensures the value assigned to the interface variable is a true constant that cannot be re-assigned by program code.

source