Here's how to make classes, fields, methods, constructors, and objects work together in your Java programs.

For instance, you might want to control how long the alarm clock will stay in snooze mode. In order to add such a feature, you need to understand how Java controls data.

Here's a topic I don't understand. What's the benefit of making a private constructor and a public getInstance method? I understand why you would make the constructor private: to keep someone from ...

Version information jackson-databind 2.11.2 spring-web 5.2.9.RELEASE Describe the bug JSON parse error: Cannot deserialize instance of java.lang.Long out of START_OBJECT token; nested exception is ...

Java object serialization is a feature of the JDK that is far too often overlooked. When a developer puts together a prototype or cooks up a proof of concept, simply saving a serialized Java object to ...

In Java, the instanceof operator is used for type checking to determine if an object is an instance of a specific class, interface, or a subclass. Its syntax is object instanceof ClassName. This ...

Learn how to implement the equals and hashCode methods in Java to ensure consistent and logical object equality in object-oriented design.

@cmelchior Thank you. I am working to just two realm objects instead of 9. Though classtoTable is still 0 the count of rows from findAll on these classes is not zero.