Java Static fianl use

1. Scope of Use: Class, method, variable.

2. Distinction and Contact:

2.1.static meaning: Static, statically decorated methods and properties belong to any object that the class does not belong to the class.
2.2.static usage:
2.2.1.static can decorate "inner classes", methods, and member variables.
2.2.2.static "Cannot decorate the outer class", "cannot decorate the local variable" (because static is defined as the class level, so the local level variable is not static decorated).

2.3 Final Meaning: "Can only be assigned once".
2.2.final usage:
A 2.2.1.final decorated property that indicates that the property can only be assigned once, (1) The base type: The value cannot be modified, and (2) the reference type: The reference cannot be modified.
The 2.2.2.final decoration method, which indicates that the method cannot be overridden, but can be accessed by a quilt class if the method is not private type.
A 2.2.2.final decorated class that indicates that a class cannot be inherited.

3. Combined use of static final

3.1. Scope of application:

3.1.2. The intersection of the two ranges, so it can only be modified: member variables, methods, inner classes.

3.2. Meaning: Also the intersection of the two:
3.2.1. Method: A method that belongs to a class and cannot be overridden.
3.2.2. Member variable: A variable that belongs to a class and can be assigned only once.
3.2.3. Inner class: Belongs to an external class and cannot be inherited

Java Static fianl use