CMSC 115 at the University of Maryland Global Campus is an applied study of foundational Java programming and software development.
UMGC's current title is Fundamentals of Programming and Software Development (the course was formerly CMIS 141). Students use professional tools to write, test, debug and document programs using variables, control flow, methods, arrays and core libraries.
Algorithmic thinking, basic secure coding, version control and AI-assisted coding are built into the workflow.
The prerequisite is CMSC 105 (or CMIS 102). Moving from Python to Java surprises many students: Java is stricter about types and structure, and the course expects professional habits such as documentation and version control from the start.
Course at a Glance
| Item | Details |
|---|---|
| University | University of Maryland Global Campus (UMGC) |
| Course code | CMSC 115 (3 credits), formerly CMIS 141 |
| Level | Undergraduate, introductory |
| Prerequisite | CMSC 105 (or CMIS 102) |
| Language | Java |
| Credit note | Credit for only one of CMIS 141, CMIS 141A or CMSC 115 |
| Typical work | Java programs with test cases, documentation and version history |
What CMSC 115 Covers
| Topic | In practice |
|---|---|
| Variables and types | Declaring typed variables such as int, double, String |
| Control flow | if, switch and loops |
| Methods | Parameters, return values and breaking programs into parts |
| Arrays | Fixed-size collections and looping through them |
| Core libraries | Classes such as Scanner, Math and String methods |
| Professional practice | Testing, debugging, documentation, version control, secure coding |
Key Concepts Explained
Static Typing
In Java every variable has a declared type, checked before the program runs. Many errors that appear at run time in Python are caught at compile time in Java.
Example: Writing int total = 7.5; fails to compile because 7.5 is a double. Declaring double total = 7.5; fixes it, and the compiler message tells you exactly which line to check.
Methods and Arrays Together
Example: A method static double average(int[] scores) loops over the array, adds each value to a running total and returns total / (double) scores.length. The cast to double avoids integer division, which would silently drop the decimal part.
Version Control
Tools such as Git record each change with a message. Committing small, working steps lets you return to a version that worked when a change breaks something.
Typical Assignments and How to Approach Them
| Assignment type | What it tests | How to approach it |
|---|---|---|
| Programming projects | Correct, well-structured code | Plan methods first, then implement and test each |
| Test plans | Thinking about correctness | Include normal, boundary and invalid inputs |
| Documentation | Explaining code | Clear comments and a short description of design choices |
| Debugging exercises | Reading errors and tracing logic | Use the debugger or print statements, one change at a time |
Writing a Useful Test Plan
Many CMSC 115 projects ask for evidence that your program works. A simple test table does this well: the input, the expected output, the actual output and whether it passed.
Include at least one ordinary case, the boundaries (such as zero, the largest allowed value or an empty array) and invalid input such as text where a number is expected. When a test fails, record the fix; it shows the marker your debugging process.
Moving from Python to Java
Most students arrive from Python in CMSC 105, and a few differences cause most early errors:
| Python | Java |
|---|---|
| Indentation marks blocks | Braces { } mark blocks |
| Types are inferred at run time | Types are declared and checked at compile time |
| Lists grow freely | Arrays have a fixed size |
| No semicolons | Each statement ends with ; |
Expect the compiler to reject code more often at first. That is helpful: it catches mistakes before the program runs.
Where Students Get Stuck
- Integer division. Dividing two
intvalues drops decimals; cast where needed. - Array index errors. Valid indexes run from 0 to length minus 1.
- Scanner quirks. Mixing
nextInt()andnextLine()can skip input. - Thin documentation. Comments should explain why, not repeat the code.
Study Tips for CMSC 115
- Commit to version control after each working step, with a clear message.
- Read compiler errors from the first one down; later errors often follow from it.
- Use AI tools to explain errors, not to write whole programs, and follow your instructor's rules.
- Rewrite a finished program from memory to check you understand it.
How We Help with CMSC 115
Send the project instructions, your code, error output and the rubric. A Java tutor can explain concepts, help you debug, review your test plan and documentation, or provide a commented model of a similar problem to learn from.
GradeEssays is independent of the University of Maryland Global Campus. Our help is tutoring and model material within UMGC's academic integrity policy; code you submit must be your own and meet your instructor's rules.
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Frequently Asked Questions
Java. UMGC describes it as an applied study of foundational Java programming and software development.
UMGC lists CMSC 105 (or CMIS 102).
CMSC 115 was formerly CMIS 141. UMGC allows credit for only one of CMIS 141, CMIS 141A or CMSC 115.
Yes. UMGC's description includes version control alongside testing, debugging and documentation.
CMSC 115 is the prerequisite for CMSC 215 (object-oriented programming in Java) and CMSC 310 (computer systems and architecture).
We explain, help debug and give model examples of similar problems, but the code you submit must be your own.