Course Description

This course couples work on program design, analysis, and verification with an introduction to the study of data structures that are important in the construction of sophisticated computer programs. Because we will be interested in studying more modern techniques for designing and implementing efficient computer programs, we will be using the object-oriented programming language, Java. We will see that the object-oriented style of programming is extremely useful in designing large, complex programs and supporting reusable software.

Students will be expected to write a collection of programs, ranging from very short programs to more elaborate systems. Since one of our goals in this course is to teach you how to write large, reliable programs composed from reusable pieces, we will be emphasizing the development of clear, modular programs that are easy to read, debug, verify, analyze, and modify.

Equally important is the ability to analyze programs for correctness and using big-"O" notation to understand their runtimes. This will help us evaluate the trade-offs in different choices of algorithms and data structures.

The formal pre-requisite for this course is Pomona CS 52 or 54. We also assume that all students enrolled are comfortable writing small to medium-sized programs (around 500 lines of code with several interacting classes) in Java. The knowledge assumed is generally equivalent to that of CSCI 051 as offered at either Pomona or CMC or the Computer Science advanced placement exam. Be aware that neither CS 5 at HMC or CS 30 at Pomona satisfy the prerequisites for this course. In particular, neither teaches the Java skills required for this course. If you have any doubts as to whether your programming experience is sufficient for this course, please see us as soon as possible. If you have never programmed in Java, check with the instructors for proper placement.

By the end of this course, you should have a good understanding of object-oriented design, coding and debugging of programs in Java, and have a good understanding of how one might analyze programs for correctness and efficiency. In particular, you will understand the trade-offs involved in selections of different data structures and algorithms to solve computational problems.

This course is a prerequisite for most upper level Computer Science courses. As part of continuing curricular changes in CS, sections of CS 62 will no longer teach C or C++. Instead that material will be taught in CS 105 taught at Pomona. Students should be aware, however, that sections of CS 105 taught at HMC will assume programming background in C. Thus students wishing to take that course at HMC will be required to learn C on their own.

Academic Accommodations

If you are seeking academic accommodations, you must contact your home college’s disability coordinator to establish accommodations. You should plan to meet with your coordinator to discuss appropriate accommodations and may be asked to provide documentation necessary to verify disabilities. Further information is available from the Student Disability Resource Center at CUC.

Use of electronics in the classroom

Laptops, tablets, and cell phones may not be used during lecture without advance permission of the instructor. Several studies (and our personal experience) have shown that these devices are a distraction and interfere with learning. Other studies have shown that taking notes by hand is more effective for learning than taking notes on a computer. We strongly recommend that you print out the lecture notes before class (they should be posted by 8:30 a.m. each class day) and annotate them by hand.

Pomona College prohibits video or voice recording of any lecture or discussion, except in cases that the office of the Dean of Students has granted a student permission according to the College’s Disability Accommodations Policy, or when permission is granted by the instructor. Please see one of the instructors if you wish to record lectures or lab sessions.

Instructor & Texts


Alexandra Papoutsaki
222 Edmunds
Office Hours: M 11 am - noon, F 1-4 pm & by appt.

William Devanny
230 Edmunds
Office Hours: W 4 pm - 6pm, Th 2:30pm - 4pm

Lectures: MWF 10:00 - 10:50 am, Edmunds 101
TAs: Sam Gearou, Berto Gonzalez, James Marshall, Matthew Paik, Cecelia Sanborn
TA hours: WTh 8-10 pm, F 3-5pm, Su 12:30-2pm, Su 8-10pm.
Labs: W 1:15 - 2:30 pm, W 2:45 - 4:00 pm, in Edmunds 229
Text: Duane Bailey, Java Structures, sqrt(7) edition, 2007.
The book is available for free online.


Students should consult this page regularly to see the most current version of the schedule of topics and readings.

All reading assignments are from the text. Students should come to class having completed the indicated readings for the day. You should attempt to work all the problems at the end of each section as you are reading. Chapter review problems will be assigned during each lecture. While chapter review problems will not be turned in, you should complete them before the next lecture after they are assigned. Many of these will show up in the regular quizzes during the first five minutes on Friday mornings, and may also appear on the midterm or final. Problems assigned in association with lecture n should be completed before lecture n+1. Answers are in the back of the book for most problems assigned.

Lecture Date Topic Code Reading Homework
1) Sep 5 Introduction & Overview Ch 0 & 1, Appendix B.3.2 1.1
2) Sep 7 Java & Javadoc code Appendix B.3.2 1.3
3) Sep 10 Java Graphics code Swing and Graphics Handouts
4) Sep 12 Graphics and Lists code Ch 3 & 4 3.7
5) Sep 14 Listeners and Assertions code Ch 2, Using Assertions 2.1, 2.3
6) Sep 17 ArrayList Implementation code Ch 3 & 4 3.5, 3.7
7) Sep 19 Analysis of Algorithms Ch 5.1 5.5, 5.9, 5.11
8) Sep 21 Induction/Sorting code Ch 5.2-3, Ch 6 5.21,5.23
9) Sep 24 More sorting code Ch 6 6.7
10) Sep 26 Iterators code Ch 8 8.3
11) Sep 28 Singly Linked Lists Ch 9 9.5
12) Oct 1 Doubly Linked Lists Ch 9 9.15
13) Oct 3 Stacks Ch 10.1 10.3
14) Oct 5 Queues Ch 10.2 10.3
15) Oct 8 Midterm I Review
16) Oct 10 Binary Trees I(midterm in lab) Ch 12.1-5 12.3, 12.7
17) Oct 12 Binary Trees II Ch 12.6-12.10 12.11
18) Oct 15 Playing on Trees: Iterators code Ch 12.6-12.10
19) Oct 17 Array Representations of Trees & Heaps Ch 13.1-13.4.1 13.1, 13.2
20) Oct 19 Priority Queues & Heapsort Ch 13.4.2-13.6
Oct 22 Fall Recess
21) Oct 24 Ordered Structures code Ch 11
22) Oct 26 Binary Search Trees Ch 14.1-8 14.3,14.5,14.11
23) Oct 29 Balanced Binary Search Trees
24) Oct 31 Maps & Dictionaries Ch 15.1-3
25) Nov 2 More Dictionaries & Hashing Ch 15.4-7 15.3, 15.9
26) Nov 5 Parallelism I Handout, sec. 2, 3
27) Nov 7 Parallelism II code Handout, sec. 4, 5
28) Nov 9 Parallelism II Handout, sec. 6
29) Nov 12 Midterm II Review
30) Nov 14 Data Ethics (midterm in lab)
31) Nov 16 Concurrency I Handout, sec. 7
32) Nov 19 Concurrency II Handout, sec. 8, 9, Sample Probs
Nov 21-23 Thanksgiving
33) Nov 26 Concurrency III and Graphs Ch 16 16.1, 16.3
34) Nov 28 Graphs II Ch 16 16.7
35) Nov 30 Graphs III Ch 16
36) Dec 3 Graphs IV Ch 16
37) Dec 5 Streams
38) Dec 7 Design Patterns
39) Dec 10 Practice Time
40) Dec 12 Summary

Assignments & Labs

Labs for this course will be held on Wednesday afternoons from 1:15 p.m to 2:30 p.m. and from 2:45 p.m. to 4 p.m. in 229 Edmunds. The room is equipped with iMac computers.
Attendance at these lab sessions is mandatory. Please arrive well prepared for the lab, having read the description thoroughly.

Unlike in CS 51 at Pomona, lab work will generally be distinct from the weekly programming assignments, though the lab work will generally be relevant to those longer assignments. Instead, we will often use lab time to introduce you to new software tools and techniques that require more hands-on experience to understand. You will usually need to submit your results from the lab by end of the lab day.

There will be two types of weekly programming assignments: individual programs and team programs. All programs assigned during the semester should be completed following the guidelines in the Academic Honesty Policy.
There will be 10 to 12 weekly programs due. All programs will be graded on design, documentation and style, correctness, and efficiency. The elements of a good program are very much like the elements of a good paper. It must be correct, but it should also be written in a style that is clear and elegant. Most programs will be tested using automated tools, so it is essential that your program meet all of the specifications provided in the assignment handout. You will also receive written comments on all of your programs by the TAs.

Weekly assignments will generally be due on Sunday evenings at 11:59 p.m. There will be a penalty assessed of 3n % for a program that is n days late. Programs will not be accepted more than four days late. It is usually better to turn in a correct and well-documented program one or two days late than a non-functioning or non-documented program on time.
All assignments should be submitted electronically. The procedure will be explained in the laboratory.

Wednesday Laboratory Assignment
Sep 12 Eclipse & Silver Dollar Graphic Silver Dollar Game
Sep 19 Timing Text Generator
Sep 26 Analysis of Algorithms On-Disk Sort
Oct 3 JUnit Compression
Oct 10 No Lab - Midterm 1! Calculator
Oct 17 Eclipse Debugger Darwin, cont.
Oct 24 Git Darwin, cont.
Oct 31 Binary Trees Hex-A-Pawn
Nov 7 Parallelism Autocomplete
Nov 14 No Lab - Midterm 2! Census Data
Nov 21 No Lab - Thanksgiving Census Data, cont.
Nov 28 Deadlock Termites
Dec 5 Graph Algorithms Driving Directions
Dec 12 No Lab! No Assignment!


There will be two in-class midterm exams plus a scheduled final exam. There will also be quizzes every Friday except the first week of classes. The quizzes will be during the first five minutes of class. No make-ups will be allowed, but the lowest score will be dropped to make up for illness or other absences.

  • Midterm examination 1: Wednesday, Oct 10, in lab.
  • Midterm examination 2: Wednesday, Nov 14, in lab.
  • Final examination: Wednesday, Dec 19, in class.

The midterms will be given during your lab period in order to allow 75 minutes to work on the exam rather than the 50 minutes available during a class period. We will place sample midterm exams on-line approximately a week before each exam.

Grading Summary

Component Weight
Weekly Programming Assignments 35%
Midterm 1 15%
Midterm 2 15%
Final Exam 25%
Labs 5%
Quizzes 5%
Total 100%

Collaboration & Academic Honesty

The Computer Science Department seeks to create a friendly and supportive learning environment. We encourage students to work in groups to review material from the lectures and readings, to work practice problems from the text, to study for exams, and to discuss the general ideas and approaches to assignments. However, work submitted for a course must be done independently, unless collaboration on a particular assignment is explicitly permitted. Effective learning is compromised when this principle is violated. As explained in the Pomona College Student Handbook, this means that the work you turn in must represent only your own work. It must not be based on help from others or information obtained from sources other than those approved by the instructors.

The following discussion reflects our general understanding of academic honesty in the Computer Science Department. Any exceptions or differences will appear in the course syllabus or the instructions for an assignment. Ask an instructor if you are ever unsure about what constitutes acceptable behavior.

Collaboration policies

The types of work and the level of expected collaboration vary from course to course and assignment to assignment. In this section, we describe some typical expectations. Instructors will often indicate that an assignment falls into a particular category, occasionally with additional remarks about the use of specific materials or sources. Students may freely use any resource that is provided by the instructor for an assignment.

Individual work

Most work in our courses is to be completed individually. In general, the work that is submitted for an assignment must be the student's own. Students may not submit work under their own name that is done by, or in collaboration with, someone else. Copying solutions from any source, including the web or students in previous offerings of the course, is not allowed.

Students should not read or possess copies in any form--physical or electronic--of another student's work. There is no legitimate reason for a student to possess a copy of another student's assignment, to send a copy of student work from one computer account to another, or to be logged-on to another student's account. Providing one's own work to another student is also a violation of these policies.

We routinely use software and other tools to detect similarities between submissions. Identical, or nearly identical, submissions will be considered conclusive evidence of plagiarism.

For programming assignments, students may normally discuss general approaches to assignments, and they may give or receive "consulting" help for specific problems with software or computer programs. A student may look at another student's work only when help is requested. In that situation, the student takes on the role of mentor, and the interaction must be limited to the immediate problem. Two students sitting side-by-side and working through a program step-by-step will certainly produce work that will be considered evidence of illegal collaboration.

On problem sets, group discussion of the general ideas and approaches is permitted, provided the group members are noted on the submitted solutions. However, each student must write the solutions apart from the group, without consulting notes or other artifacts from the discussion. Although papers are less common in computer science classes, when they are assigned they must adhere to the usual levels of academic integrity. The prose must be the student's own, and all external sources must be properly cited.

Group projects

Sometimes assignments are to be done by small teams of students. In these situations, the team takes on the role of an individual in the preceding discussion. The members of a team may communicate with one another, but collaboration with members of a different team is not permitted.

Exams and test programs

As stated in the Pomona College Student Handbook, "Students neither give nor receive assistance with examinations." Each examination will have a clear statement of what resources are permitted. Any use of material beyond those limits is not allowed. Take-home examinations will have time limits and similarly explicit rules; they are subject to the same policies. During examinations students may ask the instructor questions of clarification. The instructor will decide how complete an answer can be given. Some courses have "test programs" which are programming assignments that are to be treated in the same way as take-home examinations.

Practice exercises

Some assignments are intended to give students comfort with a programming language feature or software environment. On these, any kind of assistance is permitted. The point is to get the work done.

Use of course materials

Course materials that are distributed in class, on Github, on the web, or by other means are provided solely for students in the class. Students are encouraged to use them to the fullest extent, but they are not to publish or distribute them to other people or organizations.

Responsibility of mentors and graders

Course assistants are routinely provided with solution sets to assignments. The solutions are intended to be an aid to effective mentoring and grading. Course assistants are not to distribute the solutions, in whole or in part, at any time. Graders who encounter suspicious similarities between submissions must report those instances to the instructor in the course.


Failure to abide by our rules will be considered a violation of the college's academic honesty policy and will result in severe penalties. Instances of plagiarism are easy to identify and will be handled promptly. The first offense typically results in failure in the course and is always reported to the Dean of Students Office. A second offense is automatically referred to the College's Board of Academic Discipline. See the Academic Honesty Policy in the Pomona College Student Handbook for further information. Students from other Claremont Colleges will be treated according to the procedures of their home campus. Please do not put us, yourself, or anyone else in an unpleasant situation.

In this class, the default penalty for any sort of academic dishonesty shall be failure in the course. Please do not put yourself or any of your classmates in this position.