Welcome to CSE 122: Introduction to Computer Programming II ๐ŸŽ‰

What is this class? What will I learn?

Computing continues to play an ever-increasing role in todayโ€™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 โ€œPrior Experience and Expectationsโ€ 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 (02/26)

  • Nothing!

Tuesday (02/27)

Wednesday (02/28)

  • ๐Ÿ“š Pre-Class Material 18 (Complete before class.)
  • ๐Ÿ‘ฅ Lesson 18: Review: Putting It All Together
    Class sessions @ 11:30 AM & 3:30 PM in KNE 130 and 120.

Thursday (02/29)

  • ๐Ÿง‘โ€๐Ÿซ Section 18: Review: Collections Programming

Friday (03/01)

  • ๐Ÿ“š Pre-Class Material 19 (Complete before class.)
  • ๐Ÿ‘ฅ Lesson 19: Victory Lap & Next Steps
    Class sessions @ 11:30 AM & 3:30 PM in KNE 130 and 120.
  • ๐ŸŽจ C3 - OOP It! due @ 11:59PM PT.



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
Mon 01/01
Tue 01/02
Wed 01/03
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!

Thu 01/04
SEC 00 Welcome
resources: materials
Fri 01/05
LES 01 Java Review/Introduction; Functional Decomposition
Warm Up
I.S. by 11:59PM PT
Week 1 - File I/O
Mon 01/08 Java Review Session

Note: Optional - and will be recorded! Sessions are from 11:30pm - 12:20pm in ECE 105 and 3:30pm - 4:20pm in ARC 147.

Tue 01/09
SEC 01 Java Practice; Functional Decomposition Practice
resources: materials
Wed 01/10
LES 02 File Input/Output - Part 1
Thu 01/11
SEC 02 File I/O - Day 1
resources: materials
Fri 01/12
LES 03 File Input/Output - Part 2
pre-class: materials
in-class: materials pdf pptx
I.S. by 11:59PM PT
Week 2 - ArrayList, Reference Semantics
Mon 01/15
Tue 01/16
SEC 03 File I/O - Day 2
resources: materials
Wed 01/17
LES 04 ArrayLists
Thu 01/18
QUIZ 00 Functional Decomposition, File I/O
C0 Due 11:59 pm PT
Fri 01/19
LES 05 ArrayLists cont.
pre-class: materials
in-class: materials pdf pptx
I.S. by 11:59PM PT
Week 3 - Stacks/Queues
Mon 01/22
Tue 01/23
SEC 05 ArrayLists Practice
resources: materials
Wed 01/24
LES 06 Stacks & Queues
pre-class: materials
in-class: materials pdf pptx
Extra resources
Thu 01/25
SEC 06 Stacks and Queues Practice
resources: materials
C0, P0 Due 11:59 pm PT
Fri 01/26
LES 07 Stacks & Queues Application, Mid-Quarter Feedback
pre-class: materials
in-class: materials pdf pptx
Music Playlist
I.S. by 11:59PM PT
Week 4 - Sets and Maps
Mon 01/29
Tue 01/30
SEC 07 Data Structures Practice
resources: materials
Wed 01/31
LES 08 Sets; for-each Loop
Thu 02/01
SEC 08 Sets Practice
resources: materials
C0, P0, C1 Due 11:59 pm PT
Fri 02/02
LES 09 Maps
I.S. by 11:59PM PT
Week 5 - Nested Collections and Objects
Mon 02/05
Tue 02/06
SEC 09 Maps Practice
resources: materials
Wed 02/07
LES 10 Nested Collections
Thu 02/08
SEC 10 Nested Collections Practice
resources: materials
P0, C1, P1 Due 11:59 pm PT
Fri 02/09
LES 11 Introduction to Objects
Week 6 - Object Oriented Programming
Mon 02/12
Tue 02/13
QUIZ 01 ArrayLists, Reference Semantics, Stacks and Queues, Sets, Maps
Wed 02/14
LES 12 Encapsulation and Instance Methods
Thu 02/15
SEC 12 Objects Practice 1
resources: materials
C1, P1 Due 11:59 pm PT
Fri 02/16
LES 13 Object-Oriented Programming (OOP)
Twitter Trends
I.S. by 11:59PM PT
Week 7 - Interfaces and Beyond
Mon 02/19
Tue 02/20
SEC 13 Objects Practice 2
resources: materials
Wed 02/21
LES 14 Interfaces
Thu 02/22
SEC 14 Interfaces Practice
resources: materials
P1, P2 Due 11:59 pm PT
Fri 02/23
LES 15 Tying It All Together: Java Collections
Program Linting
I.S. by 11:59PM PT
Week 8 - Testing and Libraries
Mon 02/26
Tue 02/27
SEC 15 Review: Objects
resources: materials
Wed 02/28
LES 16 JUnit
pre-class: materials
in-class: materials pdf pptx
Thu 02/29
QUIZ 02 Nested Collections, Objects, Interfaces
P2, C2 Due 11:59 pm PT
Fri 03/01
LES 17 Third Party Libraries

Note: No pre-class work for today!

in-class: pdf pptx
I.S. by 11:59PM PT
Week 9 - Final Review
Mon 03/04
Tue 03/05
SEC 17 Review: Stacks & Queues
Wed 03/06
LES 18 Review: Putting It All Together
pre-class: materials
in-class: pdf pptx
Thu 03/07
SEC 18 Review: Collections Programming
resources: materials
All HWs Due 11:59 pm PT
Fri 03/08
LES 19 Victory Lap & Next Steps

Note: No pre-class work for today!

in-class: pdf pptx
Week 10 - Finals Week
Mon 03/11
Wed 03/13
EXAM Final Exam 12:30pm - 2:20pm
Fri 03/15