MSTU5031/Introduction

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Contents 1 Key Concepts 2 Mini Lecture 3 In-class Exercises 4 Homework 5 Notes

[edit] Key Concepts

• what we will cover, what is expected of students
• using the command line to compile and run Java programs
• Java basics review

[edit] Mini Lecture

Why study programming?

• programming is everywhere
  • blogs, wikis, mash-ups
  • games, SecondLife
  • macros, Excel, SPSS
• a common language for scholars and practitioners
• learn to think like a programmer
  • process of abstraction and domain modelling
  • algorithmic processes
  • debugging
  • project planning
• different paths for different people
  • (non-technical) part of a team developing digital media
  • advise school or organization on technology choices
  • continue studying programming and/or computer science
  • teach computer and programming courses
  • for the pure joy of programming

What you will learn in programming II

• object oriented programming concepts
  • abstraction, objects (and classes), encapsulation, composition, inheritance, polymorphism
• new Java concepts
  • Collections Framework
  • Swing (Java GUIs)
• project management and software engineering basics

How the class works

• readings
• homeworks
• class presentations
• projects
• portfolios & final exam
• grading

Overview of Computler Languages

• What types of languages exists - scripting vs programming
• How have they evolved
• External Link: http://www.99-bottles-of-beer.net/?PHPSESSID=f5c2786b414368373bf4f7f6499947dc
• External Link of what features are included in most programming languages: **http://en.wikipedia.org/wiki/Comparison_of_basic_instructions_of_programming_languages
  • http://en.wikipedia.org/wiki/Comparison_of_programming_languages#Expressiveness
  • http://en.wikipedia.org/wiki/Comparison_of_programming_languages_(list_comprehension)#Boo

Java on the command line

• opening Terminal
• moving around (cd and ls)
• compiling Java programms (javac SourceCode.java)
• running Java programs (java SourceCode)
• see the useful unix commands page for a very brief overview of how to use the command line

[edit] In-class Exercises

For these exercises, feel free to work with a partner, in teams, and to ask for help. This is not a test, but meant to get us re-acquainted with writing Java code.

1. Create an account on StudyPlace and add yourself to the [[MSTU5031/Participants|participants page].

2. Hello.java: write a program that prints out the String "Hello, world." to the console.

3. Loop.java: write a program that prints out all of numbers from 50 to 100 to the console

4. Odd.java: write a program that prints all of the numbers from 1 to 100 and indicates if they are odd or even. You will probably want to use the % modulus operator.^[1]

Output:
 1 odd
 2 even
 3 odd
 4 even
 5 odd
 6 even ...

4. Prime.java: write a program that has a method that prints all of the prime numbers from start to end, taking start and end as parameters. findPrimes(1,10) would print:

2
3
5
7

[edit] Homework

Write a program called Convert.java which can calculate the following conversions and prints them to the console:

• convert from pounds to kilograms
• convert from kilometers to miles
• calculate the total number of seconds, given a certain number of days, hours, and minutes) hint: something like public static int calcSeconds(int days, int hours, int minutes)
• convert degrees Celsius to Farenheit
• write a test method that shows that your calculations are as you expect

A good test method will tell you if your program works as expected -- without requiring any human interaction. That is, printing out the conversions and checking them by hand is not a sufficient test method.

• You do not need to create a user interface as part of this assignment (i.e. no menu that opens from a main method).
• Part of this assignment is to find the appropriate conversion scales/formulas.

*** Note: all homework must follow the Java Style Guide

[edit] Notes

Lecture One Slides

---

1. ↑ The modulus operator (%) returns the remainder of integer division. This is illustrated in the following code example:

   //...
   System.out.println("5 % 2: " + 5 % 2);
   System.out.println("38 % 5: " + 38 % 5);
   /*
   Output
   5 % 2: 1
   38 % 5: 3
   */