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 ...

The java.base module also exports packages to other modules, such as java.lang, which contains core classes like Object and String.These packages are then loaded by the bootstrap class loader. The ...

Sealed classes, proposed in JEP 409 and available since Java 17, let developers limit and control how deeply a component's type hierarchy can extend. With sealed classes, a developer can essentially ...

This value includes all blanks, spaces, and other special characters. Every character in the String is counted. String Class JavaDoc (Java 17) public int length() - returns the number of characters in ...