The difference between a Java static method and a non-static method (instance method)

The similarities and differences between static method and instance method

1. There are two ways to call a static method in an external class: (1) The class name. An object of the static method () (2) class. static method (); That is, you can call a static method without creating an object.

When invoking an instance method, there is only one way: the object of the class. Method ().

2. Static methods when accessing members of this class, only static members (static member variables, static methods) are allowed, and instance member variables and instance methods are inaccessible. There is no such restriction for instance methods!

The difference between a Java static method and a non-static method (instance method)