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Interview: the difference between interface and abstract class - concise summary

2022-07-19 02:34:00 【Tamarind_】

Interface ：

1. Constant only , No variables .

2. from public、static、final The modified , Assignment must be initialized .

3. Only abstract methods , And is public、abstract Modified abstract method .

4. There is no way to construct .

abstract class ：

1. You can have variables , You can also have constants .

2. There can be abstract methods , There can be implementations .

3. An abstract class can only inherit one class , It can be inherited by multiple classes .

4. There's a way to structure .

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