Java-Lab-003

Objectives

• Write a program that reads text typed by a person.
• Understand Precedence and Parentheses as well as when to use integers or floating point numbers in calculations.
• See why using formatting for console output is preferable to concatenation.

Part 1 - Reading Input - MrRoboto.java - Mr. Roboto Official Video

• Input is text typed by a person and read by a program.
• Input is always read as a string
• Java provides the Scanner class to aid reading input, but it must be imported into your program to use it.
• Library imports belong at the top of your java/class files before the class definition. The Scanner import is shown below.

import java.util.Scanner;

• You must create an instance of the Scanner class to use it.
• An instantiation statement for an instance of the Scanner class is below.

Scanner scanner = new Scanner(System.in);.

• System.in refers to the console input or stdin (Standard Input).

• Modify MrRoboto.java to do the following:

  • Where the comment // Write your program here exists, use the scanner instance to read standard in and wait for the user to press Enter.
  • After the enter key is pressed, your program should print the string typed by the user, initially you, concatenated to the String variable domo.
  • See Oracle's Scanner Javadoc to read all the data types Scanner can read (You want to read a String)
    • Hint: you're looking for a method -> nextLine
  • Output should look something like this:

  My name is Mr. Roboto, are you Kilroy? no, I'm stan
  Domo arigato no, I'm stan
  

Part 2 - Temperature Conversion

• In this lab implement a program that asks the user for the temperature in °F and converts it to °C.
  • The function for conversion is: Y°C = (X°F - 32) x (5/9)
  • Pay attention to integer division!
• After you've converted the temperature, print out the following:
  • The X°F the user typed
  • The Y°C you converted as a floating point number
  • The Y°C as an integer
  • The String "If it were 2°C warmer it would be: 2 + Y°C" (Do the calculation and concatenation)
• Output should like something like below for 50°F

What is the temperature in °F: 50
50°F
10.000000°C
10°C
If it were 2°C warmer it would be: 12.000000°C

Part 3 - Submission

• Make sure you've commented your code.
• Make sure you've created your feature branch.
• Commit your locally functional code.
• Push it to your Remote/origin branch (i.e. GitHub).
• Then issue a Pull request to the instructor repo that your forked from.
  • Make sure to save the Pull request URL and submit it for the lab in Canvas.