What is Lang package in Java?

lang. * and java. util. *, these live in the “lib” directory under wherever your Java Runtime Environment (JRE) is installed .

Provides classes that are fundamental to the design of the Java programming language . The most important classes are Object, which is the root of the class hierarchy, and Class, instances of which represent classes at run time.

Package in Java is a mechanism to encapsulate a group of classes, sub packages and interfaces . Packages are used for: Preventing naming conflicts. For example there can be two classes with name Employee in two packages, college.

The java. lang package is the default package in Java, by default, it will be imported . Therefore, there is no need to import this package explicitly. i.e. without importing you can access the classes of this package.