interface

来源： https://stackoverflow.com/questions/62557090/interfaces-vs-apis-vs-public-classes

来源： https://stackoverflow.com/questions/62557090/interfaces-vs-apis-vs-public-classes

来源： https://stackoverflow.com/questions/62557090/interfaces-vs-apis-vs-public-classes

来源： https://stackoverflow.com/questions/63938572/get-the-reflect-kind-of-a-type-which-is-based-on-a-primitive-type

来源： https://stackoverflow.com/questions/27214221/rest-webapi-interface-as-parameter-in-api-call

来源： https://stackoverflow.com/questions/27214221/rest-webapi-interface-as-parameter-in-api-call

来源： https://stackoverflow.com/questions/27214221/rest-webapi-interface-as-parameter-in-api-call

来源： https://stackoverflow.com/questions/61228049/java-interface-how-do-i-assign-a-specific-interface-in-multiple-activities-a

问题 I am trying to send some data from a dialogfragment to the targeted fragment but its not working. I have written the following code, but it through exception : java.lang.NullPointerException: Attempt to invoke interface method 'void com.x.x.FragmentAlertDialog$Communicator.setI(java.lang.String)' on a null object reference Code: public class FragmentAlertDialog extends DialogFragment { Communicator callback; public interface Communicator { void setI(String name); } public static

问题 I have seen somewhere we can use both WebDriver driver = new FirefoxDriver() or SearchContext driver = new FirefoxDriver() I am confused what is the difference between these two different interfaces? 回答1: SearchContext SearchContext is an interface which is the runtime container for contextual information for applications search. It contains search related meta information and can hold the reference to an external context that might be useful for the purpose of search as well as security.