Resources

25wi ver.

Note: this is for the Winter 2025 iteration of CSE 121. Looking for a different quarter? Please visit https://courses.cs.washington.edu/courses/cse121/.

WIP

This specific page of the course website is still in-flux. Once we finalize the content, we will let you know in lecture and via email/Ed. Thanks for your patience!

Software

For this class, students are not required to install any software. However, students can optionally install software to work locally; for more information, refer to software setup.

For other course technology, see course tools.

Useful CSE 121 Resources

Section Cheatsheets

  1. Java Basics and Printing: structure of a Java program, printing, comments
  2. Data Types, Expressions, and Operators: escape sequences, data types, expressions, arithmetic operators, relational operators, logical operators
  3. Variables, Strings, Debugging: variables, indexing strings and characters, string methods, debugging
  4. For Loops: for loop syntax, control flow
  5. Nested For Loops and Random: nested for loops, random methods, fenceposting
  6. Methods, Class Constants, and Parameters: methods, class constants, and parameters
  7. Returns and the Math class: math class, returns
  8. Relational/Logical Operators and Conditionals: relational/logical operator review, if, else if, and else statements
  9. While Loops, User Input, and Scanner: while loops, user input, scanner, fenceposting (again!)
  10. Arrays: syntax, initialization, access, updating
  11. 2D Arrays: syntax, initialization, access, updating, patterns

Learning Java