Because Java implementations map package and subpackage names to same-named directories, an import statement is equivalent to loading a reference type’s class file from the directory sequence ...

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 ...

To use the Java Scanner for user input, either import the java.util package, or use the full package and class name, java.util.Scanner. For the most part, Java’s Scanner class is fairly easy to use, ...