Assume that there are three types of classA and classB, classC, three class has an id attribute, there is A way need to pass in A, B, C among them any one, to get their id

 
Public void test (T T) {
T.g etId (); 
} 

Probably need to implement such a function code, consult

CodePudding user response:

Don't know what topic main want to express

CodePudding user response:

Is probably a generic into how refs call getId ()

CodePudding user response:

The parent class or interface

CodePudding user response:

{

 interface idString getId(); 
} 

The public & lt; T extends id> Void test (T T) {
T.g etId (); 
} 

CodePudding user response:

Either extract into public class or interface. Or they use reflection!