[Java Silver SE 17] Organizing the differences between classes and instances | A story about stumbling over reference variables

While studying for the Java Silver exam, I learned about "classes and instances" this time.Since this content also appeared ...
InfoWorld

Basic and advanced pattern matching in Java

Learn how to use pattern-matching features in your Java programs, including pattern matching with switch statements, when clauses, sealed classes, and a preview of primitive type pattern matching in ...

[Java Programming Proficiency Test Grade 2] Problem Collection | 60 Original Multiple-Choice Questions with Explanations for All Options

Verify your understanding of the grammar, object-oriented programming, exceptions, and collections covered in the Java ...
InfoWorld

OpenJDK proposal would make Java easier to learn

Flexible main methods and anonymous main classes would help students write basic programs much more concisely and reduce the ceremony of writing simple programs. Java would become easier for students ...
InfoQ

Java Feature Spotlight: Sealed Classes

The release of Java SE 15 in Sept 2020 will introduce "sealed classes" (JEP 360) as a preview feature. A sealed class is a class or interface which restricts which other classes or interfaces may ...