"Java" final keyword

first, final modification features

Modifier class, the class cannot be inherited (all methods in the class cannot be overridden) modify the variable, the variable becomes a constant, can only be assigned once to modify the method, the method can not be overridden

Second, final keyword modified local variables

Basic type, is the value can not be changed reference type, is the address value can not be changed, the properties of the object can be changed

Timing of initialization of final modified variables

Show initialization (implicit initialization, and then no chance to assign values to variables) before the object is constructed (that is, the variable can be assigned in the constructor, and then it is not).