Can a package have any name you might want, or are there restrictions on what you can use for a package name? Explain any restrictions. On your system, place the class Pet (Listing 6.1) into a...

Can a package have any name you might want, or are there restrictions on

what you can use for a package name? Explain any restrictions.

On your system, place the class Pet (Listing 6.1) into a package so that you

can use the class in any Java program by including a suitable import statement

without moving Pet to the same directory (folder) as your program.