Purdue CS 18000: Problem Solving and Object-Oriented Programming
CS 18000 — universally called CS 180 — is Purdue's first course for CS majors: object-oriented programming in Java, from control flow and methods through classes, inheritance, interfaces, exceptions, file I/O, and concurrency basics. It's the famous freshman gauntlet that sets the tone for the entire Purdue CS core, with labs, projects, and exams that include writing real code.
Fennie is independent and not affiliated with Purdue University. This is an unofficial study guide.
Build my CS 18000 study planWhat makes it hard
The pace assumes you can absorb Java's object model while juggling weekly labs and multi-class projects, and many freshmen arrive having only written short scripts. Exams require producing and tracing nontrivial code without an IDE, and the end-of-semester team project lands while concurrency — the course's hardest unit — is still fresh. The gap between students who code daily and students who cram before deadlines becomes visible by week six and never closes.
What you'll cover
- • Java fundamentals and control flow
- • Methods and arrays
- • Classes, objects, and inheritance
- • Interfaces and polymorphism
- • Exceptions and file I/O
- • Concurrency and threads
- • GUI and network basics in the team project
The CS 18000 study guide
How to study for Purdue CS 18000, step by step.
- 1
Write Java every day from week one
CS 18000 moves too fast for weekend-only coding. Thirty to sixty minutes daily — rebuilding lab exercises, writing small class hierarchies from scratch — keeps each week's material solid before the next stacks on it.
- 2
Learn the object model, not just the syntax
Inheritance, interfaces, and polymorphism questions are where exams separate students. For every example, ask what the reference type versus the object type is and which method actually runs — that distinction powers half the tricky questions.
- 3
Practice writing code on paper before every exam
Exams demand handwritten Java without autocomplete or a compiler. Students who pass labs through IDE trial-and-error get exposed here; weekly paper practice writing and tracing code closes that gap.
- 4
Treat labs as exam training, not chores
Lab problems calibrate you to the difficulty bar the course expects. Attempt them solo before asking for help, and rebuild any lab you needed heavy help on from a blank file afterward.
- 5
Start the team project and concurrency unit early
Concurrency is conceptually the hardest material in the course and it arrives alongside the biggest deliverable. Read ahead on threads before the unit opens, and get your project's structure working before the final crunch weeks.
- 6
Put the whole gauntlet on a Fennie Daily Plan
Upload your CS 18000 syllabus and Fennie paces daily coding practice around lab, project, and exam dates, with quizzes generated from the actual course material to test your Java reading and tracing. Free to start.
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How Fennie helps with CS 18000
Fennie's Daily Plans pace CS 18000's relentless lab-project-exam cadence into daily coding practice, so the freshman gauntlet becomes a routine instead of a series of crises. Chat explains why your Java behaves the way it does — reference versus object type, what each thread is doing — and generated quizzes drill the code-tracing skill the exams actually test.
FAQ
Is CS 18000 at Purdue hard?
It's one of the harder intro CS courses at any public university — a fast-paced Java course with labs, projects, and exams requiring handwritten code. Students with no prior programming pass it regularly, but only with daily practice; cramming visibly doesn't work here.
Can I take CS 18000 with no programming experience?
Yes, it officially assumes none — but the pace is calibrated to a room where many freshmen have coded before. Budget daily practice time from week one, and consider working through basic Java syntax the summer before so the early weeks build fluency instead of just survival.
What comes after CS 18000?
CS 18200 (Foundations of Computer Science) and CS 24000 (Programming in C), then the sophomore core of CS 25000, 25100, and 25200. Everything downstream assumes CS 180's object-oriented Java fluently, so genuine mastery matters more than the grade.
Pass CS 18000 with a plan, not a cram
Upload your CS 18000 materials and Fennie generates a Daily Plan paced to your deadline — plus chat, flashcards, and quizzes built from the actual course content.
Get started freeMore Purdue courses
CS 18200 — Foundations of Computer Science
CS 18200 is Purdue's discrete math course for CS majors — logic, proofs, sets, functions, induction, counting, graphs, and basic complexity — usually taken alongside or right after CS 18000. It's the course where CS stops being programming and starts being mathematics.
CS 24000 — Programming in C
CS 24000 teaches C to students who already know Java from CS 18000 — pointers, memory management, structs, dynamic allocation, and the machine-level view of data — as preparation for the systems half of the Purdue CS core. Homework is programming-heavy and exams test C semantics in detail.
CS 25000 — Computer Architecture
CS 25000 covers how computers actually work, from transistors and logic gates up through combinational and sequential circuits, datapaths, assembly language, and memory hierarchy. It's one of the two sophomore-core courses (with CS 25100) that Purdue CS students take after the freshman sequence.
CS 25100 — Data Structures and Algorithms
CS 25100 is Purdue's data structures and algorithms course — lists, trees, heaps, hash tables, graphs, sorting, and algorithm analysis — and the most notorious course in the CS core. It gates the upper-division CS curriculum and its exams have a campus-wide reputation for difficulty.