CPSC 124: Introduction to Programming

   Department of Mathematics and Computer Science
   Hobart and William Smith Colleges

   Spring 2021.

   Instructor:  David J. Eck  (eck@hws.edu)

   Syllabus:  http://math.hws.edu/eck/courses/cpsc124_f21.html

   Monday, Wednesday, Friday, 9:50–10:50 AM
       Coxe 7.

   Lab: Tuesday, 10:10–11:40 AM
       Rosenberg 009.

Lab Instruction Sheets
Lab 1, August 24
Introduction to Java
Lab 2, August 31
Using Subroutines
Lab 3, September 7
while and if
Lab 4, September 14
Loopy Art
Lab 5, September 21 Lab 6, September 28

Quiz and Test Answers
Quiz #1, August 30 Quiz #2, September 6 Quiz #3, September 13

Some Sample Programs and Lab Solutions

Some Useful Links

Fourth Week: September 13, 15, and 17

We will continue looking at control structures this week. Most important are the for loop and the form of the if statement that uses else if. The break statement, which can be used to exit a loop early, is also important. We will discuss the do..while statement and the switch statement, but they are less important. I will expect you to be able to read and understand code that uses do..while and switch, but I will not require you to use them in code that you write yourself.

The reading for the week is Sections 2 through 5 in Chapter 3. From Section 3.2, the main take-away is the idea of algorithm. (You might want to look at Section 3.9, which talks about JavaFX. The material in that section has been covered in labs, and we won't be spending more time on it in class.)

There is a quiz on Monday this week, and a test coming up at the end of next week, on Friday, September 24.

Third Week: September 6, 8, and 10

The reading for the week is Section 3.1 and Section 2.5. We will start the week on Monday with Section 3.1, which introduces two of Java's control structures: the while loop and the if statement. We will look at a number of examples, and you will start using these control structures in the lab on Tuesday. We will continue with examples on Wednesday, but we will start concentrating on how to go about developing a program to carry out a given task.

Section 2.5 is full of detail about expressions in Java. It covers many different "operators" such as %, >=, &&, ++, and +=. We will cover some of the most important ones in class, but you should read that section for yourself and use it as a reference when needed. (Section 2.6 contains information about using Java. We will not cover it, and it is not required reading. It could be useful to you if you are trying to use Java on your own computer.)

Once again, there is quiz at the start of class on Monday.

Second Week: August 30; September 1 and 3

The reading for the week is Section 2.3 and Section 2.4. You can skip Subsections 2.3.4, Subsection 2.3.5, and Subsection 2.4.4. We will not cover the material in any of those sections. You can also skip Subsection 2.4.6 for now, but we will cover it eventually.

The main topic is using pre-defined subroutines. We will look at some of the subroutines defined in class Math, in class System, and in objects of type String. These are all standard, built-in parts of Java. We will also see how to use input subroutines from TextIO, a class that is not a standard part of Java. Many of the subroutines that we will look at are "functions." That is, they return, or compute, a value. The lab on Tuesday will also introduce subroutines from the GraphicsContext class, which are used to draw shapes on the screen.

There is a quiz on Monday, at the beginning of class, covering Sections 1.1, 1.3, and 2.1.

First Week: August 23, 25, and 27

Welcome to the course!

You should begin reading the textbook, which is available on-line at http://math.hws.edu/javanotes. Because the first lab is on Tuesday, we will move very quickly into the most basic aspects of Java programming, which are covered in Section 2.1 and Section 2.2. Some of the same information that you need will be provided in the lab, and the work for the lab is not due until next week, but it would be useful to start reading Chapter 2.

Aside from starting in on Java programming, during the first week of the semester, we will go over some of the introductory material from Chapter 1 of the textbook. We will cover only a part of Chapter 1 in class, but it is a good idea to read the entire chapter to get a preview of most of the topics that will be covered during the rest of the semester. However, you should not expect to fully understand everything in Chapter 1 at this time. The most important sections are Section 1.1 and Section 1.3. Those two section give a brief overview of how computers and Java actually work. Sections 1.4, 1.5, and 1.6 give short overviews of many of the topics that we will cover in the rest of the semester. It is recommended that you read them to orient yourself in the course, but they are not required reading.

The required reading for the first week also includes the course syllabus!