Project $9-2$: Length Converter

Create a Java application that allows the user to convert a length from a list of conversions that are stored in a file. This application should also allow the user to add or delete conversions from the list of conversions.

Console

Length Converter

$1-$ Convert a length

$2-$ Add a type of conversion

$3-$ Delete a type of conversion

$4-$ Exit

Enter menu number: $1$

$1-$ Miles to Kilometers: $1\mathrm{.}6093$

$2-$ Kilometers to Miles: $0\mathrm{.}6214$

$3-$ Inches to Centimeters: $2\mathrm{.}54$

Enter conversion number: $2$

Enter Kilometers: $10$

$10\mathrm{.}0$ Kilometers $=6\mathrm{.}214$ Miles

$1-$ Convert a length

$2-$ Add a type of conversion

$3-$ Delete a type of conversion

$4-$ Exit

Enter menu number: $2$

Enter 'From' unit: Centimeters

Enter $\text{'}$To$\text{'}$ unit: Inches

Enter the conversion ratio: $\mathrm{.}3937$

This entry has been saved.

$1-$ Convert a length

$2-$ Add a type of conversion

$3-$ Delete a type of conversion

$4-$ Exit

Enter menu number: $1$

$1-$ Miles to Kilometers: $1\mathrm{.}6093$

$2-$ Kilometers to Miles: $0\mathrm{.}6214$

$3-$ Inches to Centimeters: $2\mathrm{.}54$

$4-$ Centimeters to Inches: $0\mathrm{.}3937$

Enter conversion number: $4$

Enter Centimeters: $2\mathrm{.}54$

$2\mathrm{.}54$ Centimeters $=1$ Inches

$1-$ Convert a length

$2-$ Add a type of conversion

$3-$ Delete a type of conversion

$4-$ Exit

Enter menu number: $4$

Goodbye.

Project $9-2$: Length Converter $($continued$)$

Specifications

$$ Create a class named Conversion that can store information about a conversion, including fromUnit, fromValue, toUnit, toValue, and conversionRatio. This class should also contain the methods that perform the conversion calculations and return the results as a formatted string.

$$ Create a class that contains the methods that store an array list of Conversion objects in a file. For example:

public ArrayList getConversions$()$

public boolean saveConversions$($ArrayList typesList$)$

$$ Store the list of conversions in a text file named conversion$\_$types.txt that$$s in the same directory as the class that reads and writes the file. If the conversion$\_$types.txt file doesn$$t exist, the class should create it$.$ This class should use buffered I$/$O streams, and it should close all I$/$O streams when they$$re no longer needed.

$$ Use the Console class or a variation of it to validate the user$$s entries. A valid integer is required for a menu choice, non$-$empty strings are required for the $$From$$ and $$To$$ fields, and a valid double is required for the conversion ratio.