Static: used to declare a static method, static methods that can be invoked, class and object
Declared with the static method show that this method is not generated when the instance of the class can be directly call, and the abstract methods can be invoked, the contradiction, therefore, the abstract and static cannot even used to modify method
2, the abstract and native
What
Native: used to declare a local method, the realization of the method is implemented by the Java language, such as C, commonly used in Java and the external environment interaction, or interact with the operating system,
Reference: Native methods in Java Native Method
How
A laparoscope, usually connected to a native can with all other Java identifier, except the abstract,
According to
Because native suggest that these methods are implemented, but these are Java implementation body, but the abstract clearly indicate these methods with no implementation body,
3, the abstract and synchronized
What
Synchronized: used to prevent multiple threads to invoke the method of an object at the same time, and can prevent multiple threads at the same time call a laparoscope, usually connected to a static class of the method,
How
The abstract and synchronized can't use at the same time
According to
Can be seen from the synchronized function also, use synchronized is the premise of the method can be called directly, obviously can't and the abstract,
Reference links: https://www.cnblogs.com/upcwanghaibo/p/6527443.html
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