Method references: A primer. My previous Java 101 tutorial introduced lambda expressions, which are used to define anonymous methods that can then be treated as instances of a functional interface.

PascalCase for Java reference types. There are five reference types in Java: classes, interfaces, annotations, enums and the recently added record. The standard Java naming convention demands that ...

Remember that in Java, for a reference variable of some type referring an object of its supertype is forbidden: arrows in Figure 8 must not be directed upwards.

Java's default constructor allows developers to create instances of classes when no other constructors are explicitly defined. The default constructor in Java takes no arguments -- it simply ...