2020年

英文: How to add fragment activity to MainActivity.java or MainAcyivity.kt 问题 I am trying to build fin...

英文: Java `illegal access operations` method will be deprecated? 问题 After JDK 9+ JVM emit illegal acc...

英文: How does JAVA allow class instantiation within the class? 问题 我对JAVA不熟悉。我对以下结构感到疑惑： class MyClass...

英文: How to parse JSONArray which is in another JSONArray 问题 以下是您提供的JSON数据的翻译部分： { "phone": &...

英文: the default collector for Young gen. of Java 1.5, 1.6, 1.7 and 1.8？ 问题 我正在学习Java的垃圾回收技术，参考了https...

英文: How to check which image is set on an image view in Android? 问题 I want to check, which image is ...

英文: maven-cucumber-reporting plugin is not generating the report - in latest 5.3.0 version 问题 经过从Git...

英文: In Java - how do I get a full stack trace 问题 目前我从代码运行中获得以下输出： 由于: java.lang.NullPointerException...

英文: Custom Combo box in JTable wont set the selected option 问题 I've created a custom combo box that ...

英文: I can't invoke the method defined in the subclass 问题 I have 2 classes: public class Animal {...