我想要與澤西客戶端的可選類。當遠程服務器返回Optional.empty()時,出現此錯誤。 Caused by: com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "present" (class java.util.Optional), not marked as ignor
我有一個KStream x KStream加入正在打破,出現以下異常。 Exception in thread 「my-clicks-and-recs-join-streams-4c903fb1-5938-4919-9c56-2c8043b86986-StreamThread-1" org.apache.kafka.streams.errors.StreamsException: Exceptio
ListView<ChatModel> listView;
ObservableList<ChatModel> items = FXCollections.observableArrayList();
private final Image IMAGE_MEN = new Image("men.png");
private final Image IMAGE_WOMEN = new Ima
這裏有一個簡單的類,說明我的問題未綁定的非靜態方法: package com.example;
import java.util.function.*;
public class App {
public static void main(String[] args) {
App a1 = new App();
BiFunction<App, Long