OpenJDK is now able to build and run on iOS (and Android) as a native binary, opening the way to run unmodified Java code on ...

Classes and objects in Java must be initialized before they are used. You’ve previously learned that class fields are initialized to default values when classes are loaded, and that objects are ...

Constructors play a key role in all object-oriented programming languages, and Java is no exception. Every class a Java developer creates needs a constructor. Constructors perform numerous important ...

The guts of my program use 4 "global" variables that can be set on the command line. I have a hacky way to make this work, but now I'm wrapping a GUI around it and need the GUI to access my globals.

Unlock the full InfoQ experience by logging in! Stay updated with your favorite authors and topics, engage with content, and download exclusive resources. This article dives into the happens-before ...

Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs. Abstract classes and ...

We investigate the algorithmics of subtyping in the presence of nominal inheritance and variance for generic types, as found in Java 5, Scala 2.0, and the .NET 2.0 Intermediate Language. We prove that ...

When I try to simply add a empty constructor method to a test class by using Java template in my customized recipe, after code refactoring, the constructor is generated but with a returned type ...

Exception in thread "main" java.lang.IllegalStateException: No constructor or factory method candidate found for Root bean: class [org.apache.dubbo.config.spring ...