Keywords

The content discusses several important Java keywords, including "new," "this," "native," and "final." The "new" keyword is used to instantiate classes and invoke constructors, while "this" refers to the current object within methods or constructors. The "native" keyword indicates methods written in platform-dependent languages outside of Java, typically used with JNI. Lastly, the "final" keyword prevents classes from being subclassed, methods from being overridden, and is essential for ensuring immutability and consistent behavior in objects, as seen in the String class.