What is Java Package and which package is imported by default?

Java package is the mechanism to organize the java classes by grouping them. The grouping logic can be based on functionality or modules based. A java class fully classified name contains package and class name. For example, java.lang.Object is the fully classified
name of Object class that is part of java.lang package.
java.lang package is imported by default and we don’t need to import any class from this package explicitly.