BACKGROUND
When a Java program is executed and a new object is
created, e.g.,
Scanner input = new Scanner(System.in)
Java searches for a file that contains the corresponding class, e.g.,
Scanner.java
The first place it looks is in the files within
the program project. If not found there, then is looks
in the java.lang package. If not found there then is
looks for such a file in whatever list of places are
provided in the import statements at the top of the
program.
Since there is not a file named Scanner.java
within this program's set of files, and since there
is also not such a file in the java.lang package, it
attempts to find a file named Scanner.java in the packages mentioned
in the import statements. In this case, the import
statementimport java.util causes it to look in
the java.util package, which is where is it located.
If the Scanner.java were not found in any of the
locations that the import statements of the program
indicated, then the program executed would terminated
with the error message Symbol Not Found: Scanner.
A symbol is a name, and not just a single character.
WHAT TO DO
Modify the program WITHOUT adding an import statement
in order to make the program run as intended.