/UE10

Java programs for the tenth exercise unit (UE10) in "Software Development 1". Focus: exception handling, abstract classes, interfaces, and vehicle simulations.

Primary LanguageJavaMIT LicenseMIT

Software Development Exercises - UE10

📜 Tasks

This exercise focuses on exception handling, abstract classes, and interfaces. The tasks are divided into three main sections:

1. Exception Handling

Implement a program to read and display HTML content from a URL with proper exception handling:

  • MalformedURLException: Retry until a valid URL is entered.
  • IOException (openStream): Exit the program with an error message.
  • IOException (read/close): Handle reading errors and ensure the input stream is closed in a finally block.

2. Throwing and Testing Exceptions

Develop a BankAccount system:

  • Class Account:
    • Methods for withdraw and deposit with exception handling.
    • Exceptions:
      • IllegalArgumentException for invalid amounts.
      • Exception for overdrawing or exceeding €100,000.
  • Class BankApp:
    • Test the Account class with various scenarios, ensuring expected exceptions are thrown and caught.

3. Abstract Classes and Interfaces: Vehicles

Develop a vehicle simulation with a hierarchical design:

Abstract Class Vehicle

  • Fields: kind, drivenDistance, cumulativeCosts.
  • Methods:
    • drive(double km): Updates distance and costs.
    • abstract double costPerKM(): To be implemented by subclasses.

Abstract Class Car (extends Vehicle)

  • Fields: fuelPer100km.
  • Methods:
    • costPerLiter(): Abstract method to calculate fuel cost.
    • costPerKM(): Implements the cost calculation for cars.

Subclasses of Car:

  • DieselCar: Sets fuel cost to €1.70 per liter.
  • GasolineCar: Sets fuel cost to €1.60 per liter.

Class Bike (extends Vehicle):

  • Fixed cost of €0.80 per ride, regardless of distance.

Interfaces:

  • Printable: Method void print() to display vehicle details.
  • Repairable: Methods for repairs and maintenance.

Class VehicleApp:

  • Test the vehicle hierarchy and methods using a predefined array of vehicles.

📂 Project Structure

src/

  • In.java Helper class for input
  • Out.java Helper class for output
  • DownloadHtmlExample.java Handles exception-based URL reading
  • Account.java Implements bank account functionality
  • BankApp.java Tests the Account class
  • Vehicle.java Abstract base class for vehicles
  • Car.java Abstract class for cars
  • DieselCar.java Represents diesel-powered cars
  • GasolineCar.java Represents gasoline-powered cars
  • Bike.java Represents bicycles
  • Printable.java Interface for displaying details
  • Repairable.java Interface for repairs and maintenance
  • VehicleApp.java Demonstrates vehicle functionalities

tests/

  • Testprotokolle.txt Test cases and results for all tasks

🛠 Tools

  • Programming Language: Java
  • Editor: Visual Studio Code with JavaWiz extension

📝 License

This project is licensed under the MIT License.