---
title: "Jam 04 - All"
tags:
- 3 🧪 in testing
- 4 🥳 done
- jam04
- arrays
- switch
- control flow
- gradle
created: 2025-02-20
updated: 2025-02-20
prerequisites:
- Previous jams: Jam00-03 completed
- Tools: IntelliJ, Java 21, Git, Gradle
- Concepts: Basic Java, Git fundamentals
---
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# Jam 04 - Arrays & Control Flow

:::spoiler **Course Development Team**
<center>
<table width="100%">
<tr align="center">
<td width="50%">
<img src="https://www.dropbox.com/scl/fi/uz9dn7vc9y5k43160pdb0/Fun-Artsy-Square.png?rlkey=2zmgqgblwsagukfsb343tl3ye&raw=1" alt="Lily Romano" width="100" style="border-radius: 50%"/><br/>
<a href="https://lilyromano.com">Lily Romano</a>
</td>
<td width="50%">
<img src="https://www.bucknell.edu/sites/default/files/styles/faculty_page_photo/public/libris/C00001GOQFVeT0YE/G0000hRJySpIobZY/20160419-7C8A4469.jpg" alt="Brian King" width="100" style="border-radius: 50%"/><br/>
<a href="https://www.bucknell.edu/fac-staff/brian-king">Brian King</a>
</td>
</tr>
</table>
</center>
:::

| | |
| ---------------------- | ---------------------------------------- |
| **Working Directory:** | `src/main/java/jam04` |
| **Points:** | 10 pts |
| **Team-based?** | NO (but discussion encouraged) |
| **Due:** | Monday, 2025-Feb-20 @ 11:59 pm |

# Objectives

- Master Java's array syntax and operations
- Implement control flow using the switch statement
- Configure Gradle in IntelliJ for project management
- Apply statistical concepts in programming
- Practice input validation and error handling

# Introduction & Outcomes

Welcome to Jam 04! In this jam, you'll transition from basic Java syntax to more complex programming constructs. You'll work with arrays - Java's fundamental data structure for storing collections of values - and explore control flow using the switch statement. Through practical exercises involving a calculator and statistical analysis, you'll learn how these tools can solve real-world problems while gaining experience with professional development tools like Gradle and IntelliJ.

## What You'll Learn & Accomplish

1. **Project Setup & Build Tools**
- Configure Gradle for project management
- Set up proper project structure
- Use build automation tools
- **Outcome**: Create a professional-grade Java project with automated builds

2. **Control Flow & Input Processing**
- Implement switch statements
- Handle user input validation
- Process complex expressions
- **Outcome**: Build a robust calculator program with error handling

3. **Array Operations & Algorithms**
- Master array manipulation
- Implement recursive solutions
- Analyze algorithmic efficiency
- **Outcome**: Create a library of array utility methods

4. **Statistical Analysis**
- Calculate statistical measures
- Analyze data distributions
- Work with enumerated types
- **Outcome**: Develop a program that analyzes data skewness

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# Getting Started

Before diving into the exercises, let's set up our workspace:

1. Open IntelliJ
2. Create a directory `jam04` under `src/main/java`

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