Welcome to CSE 122: Introduction to Computer Programming II 🎉

What is this class? What will I learn?

Computing continues to play an ever-increasing role in today’s society. Having an understanding of computing is an essential skill for those in the 21st century; from working in industries more reliant on technology, using computational methods to further scientific understanding, or being an informed citizen in a world with technology all around us.

This course is a second-level course in computer programming focused on the use of data structures and object oriented programming. It assumes students already have experience with some computer language and understand fundamental computing concepts such as control structures (loops and conditionals), variables, and arrays (see “Prior Experience and Expectations” for more details).

In this course, students will learn:

  1. Solving complex problems by decomposing them into smaller programming tasks, and assess the design trade-offs of particular solutions to these problems.
  2. The use of data structures such as lists, dictionaries, and sets to efficiently solve computational problems.
  3. Fundamental concepts in designing objected oriented programs to ensure abstraction between the interface of something and its implementation.
Prior Experience and Expectations

Prerequisite Material

This course is intended for students who already have some programming experience. Students entering CSE 122 should already be familiar with programming constructs for problem decomposition (methods or functions), control structures (loops and conditionals), variables and data types (such as integer data), and data structures such as arrays or lists.

To better assess if CSE 122 is the right class for you, the Allen School has developed a Self-Guided Placement to help students assess which intro course is the right one for them to enroll in. Please see this website for more information on who to contact if you have questions about which introductory CSE course is the right course for you.

Programming Language

CSE 122 is taught in the Java programming language, but previous experience in Java is not expected to be successful in this course. Students who are familiar with another programming language will be provided with resources and tutorial to get up-to-speed with Java. If you would like to get started with practicing Java, please see our Java Tutorial.


If you want to learn more about the course and its policies, please check out our course syllabus.


Feedback is always welcome! You can contact the the course staff or submit anonymous feedback.


Please do not email the course staff or instructors regarding registration for the course. The course staff do not have access to add codes. Please email ugrad-adviser@cs.washington.edu for assistance.


This Week (at a glance)

Monday (10/02)

  • Java Review Session 4:30-6:00 PM in BAG 131!

Tuesday (10/03)

  • 🧑‍🏫 Section 1: Java Practice; Functional Decomposition Practice

Wednesday (10/04)

  • 📚 Pre-Class Material 2 (Complete before class.)
  • 👥 Lesson 2: ArrayLists
    Class sessions @ 11:30 AM & 3:30 PM in GUG 220.

Thursday (10/05)

  • 🧑‍🏫 Section 2: ArrayLists Practice
  • 💻 P0 - Warm Up due @ 11:59 pm.

Friday (10/06)

  • 📚 Pre-Class Material 3 (Complete before class.)
  • 👥 Lesson 3: ArrayLists cont.
    Class sessions @ 11:30 AM & 3:30 PM in GUG 220.
  • 🎨 C0 - TODO List released. Due Thursday (10/12) @ 11:59 pm.



This is a rough sketch of the quarter and things are subject to change. We can accurately predict the past, but predicting the future is hard!


Anything listed in the “Lesson” materials for a day should be read before attending class that day. The Lessons are a first introduction to the most important terms and concepts for that day of class. It is okay if the Lesson doesn’t make complete sense as we have the rest of the class day to clarify the concepts, but if you don’t do the Lesson the class session won’t make any sense.

Topic Programming / Creative Projects Resubmissions
Week 0 - Welcome, Review, Functional Decomposition, Design
Tue 09/26 No section today!
Wed 09/27
LES 00 Welcome; Syllabus Details

Note: Normally you would complete the Pre-class Work before class. There is nothing you need to complete before class today!

in-class: materials pdf pptx
Thu 09/28
SEC 00 Welcome
Fri 09/29
LES 01 Java Review/Introduction; Functional Decomposition
pre-class: materials
in-class: materials pdf pptx
Warm Up
I.S. by 11:59 pm
Week 1 - ArrayList, Reference Semantics
Mon 10/02 Java Review Session

Note: Optional and will be recorded! Session is from 4:30 - 6:00 PM in BAG 131

Tue 10/03
SEC 01 Java Practice; Functional Decomposition Practice
resources: materials
Wed 10/04
LES 02 ArrayLists
pre-class: materials
Thu 10/05
SEC 02 ArrayLists Practice
Fri 10/06
LES 03 ArrayLists cont.
I.S. by 11:59 pm
Week 2 - Stacks/Queues
Tue 10/10
QUIZ 00 Functional Decomposition, ArrayList
Wed 10/11
LES 04 Stacks & Queues
Thu 10/12
SEC 03 Stacks and Queues Practice
Fri 10/13
LES 05 Stacks & Queues Application
Music Playlist
I.S. by 11:59 pm
Resub 0
Due 11:59 pm
Week 3 - 2D Arrays and Sets
Tue 10/17
SEC 04 Data Structures Practice
Wed 10/18
LES 06 2D Arrays
Resub 1
Due 11:59 pm
Thu 10/19
SEC 05 2D Arrays Practice
Fri 10/20
LES 07 Sets; for-each Loop
Image Manipulation
I.S. by 11:59 pm
Week 4 - Maps and Nested Collections
Tue 10/24
SEC 06 Sets Practice
Wed 10/25
LES 08 Maps
Resub 2
Due 11:59 pm
Thu 10/26
SEC 07 Sets, Maps Practice
Fri 10/27
LES 09 Maps; Nested Collections
I.S. by 11:59 pm
Week 5 - Objects
Tue 10/31
QUIZ 01 Reference Semantics, Stacks and Queues, 2D Arrays, Sets
Wed 11/01
LES 10 Introduction to Objects
Resub 3
Due 11:59 pm
Thu 11/02
SEC 08 Nested Collections Practice
Fri 11/03
LES 11 Encapsulation and Instance Methods
Week 6 - Object Oriented Programming
Tue 11/07
SEC 09 Objects Practice 1
Wed 11/08
LES 12 Object Oriented Programming (OOP)
Resub 4
Due 11:59 pm
Thu 11/09
SEC 10 Objects Practice 2
Fri 11/10
HOLIDAY Veteran's Day - NO CLASS!
Twitter Trends
I.S. by 11:59 pm
Week 7 - Interfaces and Beyond
Tue 11/14
SEC 11 TA's Choice!
Wed 11/15
LES 13 Interfaces
Resub 5
Due 11:59 pm
Thu 11/16
SEC 12 Interfaces Practice
Fri 11/17
LES 14 Tying It All Together: Java Collections
Program Linting
I.S. by 11:59 pm
Week 8 - Testing, Libraries, and Turkeys
Tue 11/21
QUIZ 02 Maps, Nested Collections, and Objects
Wed 11/22
LES 15 JUnit
Resub 6
Due 11:59 pm
Thu 11/23
HOLIDAY Thanksgiving! - NO SECTION!
Fri 11/24
HOLIDAY Eating Turkey - NO CLASS!
Culminating Assignment
I.S. by 11:59 pm
Week 9 - Final Review
Tue 11/28
SEC 13 Review: Stacks & Queues
Wed 11/29
LES 16 Third Party Libraries
Thu 11/30
SEC 14 Review: Collections Programming
Fri 12/01
LES 17 Review: Putting It All Together
Week 10 - Finals Week
Tue 12/05
SEC 15 Review: Objects
Wed 12/06
LES 18 Victory Lap & Next Steps
Resub 7
Due 11:59 pm
Thu 12/07
SEC 16 Extra Day!
Fri 12/08
LES 19 Extra Day!