Arithmetic, User Inputs, Scanner Objects, Methods II

Part $0$

Download the following starter code: Lab$2$a$.$java Download Lab$2$a$.$java and Lab$2$b$.$java Download Lab$2$b$.$java

As you progress through the lab, look over the relevant starter code file and make sure you know what material has been provided for you.

Part $1$

Lab$2$a

Write a method called kelvins that takes as input $($that is$,$ as argument$)$ a temperature in degrees Fahrenheit $($of type double$)$ and returns the temperature in degrees Kelvin $($also a double$).$ Here is the mathematical formula for conversion:

Write another method called temperaturePrinter that takes as input $($i$.$e$.$ as argument$)$ two doubles and prints the following message to the screen:

#$.$## deg. F equals #$.$## deg. K

Where #$.$## are correct values in degrees Fahrenheit and Kelvin.

Test your methods with $5$ different values for Fahrenheit. Either print the results of each test as they are run, or record the results of the tests in comments.

Part $2$

Write a method called secondTime$()$ that takes as argument an integer corresponding to a number of seconds. secondTime$()$ should compute and display the equivalent time in hours, minutes and seconds, printing the result to console in the format:

secondTime$(1234)$; should generate:

$1234$ seconds $==00$:$20$:$34//$meaning $0$ hours, $20$ min, $34$ seconds

Hint: Use a tool like Tools$4$Noobs Links to an external site. to help determine the correct answer so that you can test your code.

Write another method called inSeconds$()$ that takes as arguments three integers: hours, minutes and seconds, computes the exact time in seconds, then returns the total number of seconds and prints the following message to the console:

inSeconds$(0,20,34)$; should generate:

$00$:$20$:$34==1234$ seconds

Write the following tests of your methods and submit the outputs with your codebase.

inSeconds$(0,2,0)$;

secondTime$(9001)$;

inSeconds$(24,0,0)$;

secondTime$(3600)$;

inSeconds$(-1,61,-60)$;

Part $3$

Lab$2$b

Make sure that you are done with Lab$2$a before you move on to this part. In this exercise you will:

Use two methods from the Math library, namely max and min. Here is a quick introduction to these methods: they each take two numeric inputs $($i$.$e$.$ arguments$)$ and return whichever number is the maximum or minimum $($depending on if you are using max or min$)$ of the two. Let$$s try them out! In main, declare and initialize variables as follows:

double maxNumber$1=$ Math.max$(22\mathrm{.}3,34\mathrm{.}5)$;

double minNumber$1=$ Math.min$(3\mathrm{.}6/7\mathrm{.}2,3\mathrm{.}8/6\mathrm{.}9)$;

double maxNumber$2=$ Math.max$(2/3,0\mathrm{.}1)$;

double minNumber$2=$ Math.min$(13\mathrm{.}5555,13\mathrm{.}5556)$;

What are their values? Write them down somewhere. Now print them to the screen, did you get what you expected? If not, reflect on the reason and ask someone. Make sure you understand how to use these methods before proceeding.

Write a program in main that asks the user of your program to first enter his or her name followed by $3$ real numbers $($that is$,$ any number from $\backslash$infty to $\backslash$infty $).$ Your program should sort the three numbers in descending order, then print to the screen a greeting to the person and the sorted numbers. For example $($your input in blue$),$

Please enter you name followed by three numbers $($space separated$)$:

Leonardo $-22\mathrm{.}312\mathrm{.}22\mathrm{.}3$

Hi there, Leonardo! Here are the numbers you entered in descending order:

$12\mathrm{.}22\mathrm{.}3$ and $-22\mathrm{.}3$

Thank you for using the three$-$number$-$sorting system! Good$-$bye.

Note: You must use the Math.max and Math.min methods introduced above. The class has not covered conditionals, so please avoid using conditionals!

Make sure to run your program several times and test it with several inputs of different order

Submittal:

Submit both Lab$2$a$.$java and Lab$2$b$.$java files to Canvas by the due date.