java.lang: A collection of language-related classes, such as Object and String, organized in the java package’s lang subpackage; java.lang.ref: A collection of reference-related language classes ...

Java’s javac compiler, for example, does not translate a lambda expression into a dedicated class file at compile time but emits bytecode to dynamically generate and instantiate a class ...

Sealed classes make Java an even more powerful and expressive language and set the stage for even more sophisticated techniques such as pattern matching, which we'll explore in a subsequent article. A ...