In the package directive’s absence, those classes and interfaces belong to the unnamed package (the directory the JVM regards as the current directory—the directory where a Java program begins ...

1) abstract abstract keyword is used to implement the abstraction in java. A method which doesn’t have method definition must be declared as abstract and the class containing it must be declared as ...

A package in Java is a way to organize classes, interfaces, enums, records into namespaces. It helps in managing large codebases by grouping related components together.

Canonical has announced that OpenJDK 11 has become the default Java package on Ubuntu 18.04 LTS, replacing OpenJDK 10. The move comes days after Red Hat announced its stewardship of OpenJDK 11.