These are the projects that I worked on in my Java class - CMSC131 Object-Oriented Programming I at University of Maryland - College Park.

Here is a brief summary of the projects:

1) Project 1: Java Basics/Conditionals

In this project I implemented three programs: Area (computes the area of a triangle), Divisible (reads two integer values x and y, computes the remainder, and determines whether x is divisible by y), and ColorGenerator (computes a CSS color). This project is for practicing Java's expressions, input/output, and conditionals.

2) Project 2: Java Loops

In this project I implemented three programs: Convert (converts from decimal to octal), ThrowDie (simulates throwing a die), and Access (simulates accessing a system). This project is for practicing Java's loops.

3) Project 3: Drawing App

In this project I wrote methods that draw different diagrams (rectangles, flags, etc.). This project is for practicing writing Java static methods and nested loops.

4) Project 4: Passport Class

In this project I implemented a Passport class that represents a person's Passport. A passport has the full name of a person (first, last and middle name) along with the stamps of countries the person has visited. This project is for practicing basic class definition.

5) Project 5: PhotoManager

In this project I implemented the class Photo and PhotoManager. These classes support a photo manager. This project is for practicing class definition, use of a class by another class, ArrayLists and Collections class.

6) Project 6: Array Utilities

In this project I wrote static methods associated with the Utilities class that support array operations. This project is for practicing one-dimensional arrays.

7) Project 7: Diagram System

In this project I implemented classes that support displaying and animating diagrams similar to the ones I developed for the DrawingApp project. This project is for practicing two-dimensional arrays and interfaces.

8) Project 8: Media Rental Manager

In this project I implemented a simplified version of a system that allows people to rent movies and music albums (similar to Netflix) and receive them via mail. For this project I defined all the classes/interfaces needed. This project is for practicing design.

9) Project 9: Recursion Exercise

In this project I implemented a set of recursive methods processing strings and arrays. One of methods (replaceCells) illustrates the power of recursion. This project is for practicing writing recursive methods.