diff --git a/README.md b/README.md index b6b06bc..753d5f8 100644 --- a/README.md +++ b/README.md @@ -1,87 +1,131 @@ # Java Examples Collection -> Designed for the AUEB CS BSc Java Course ->> https://eclass.aueb.gr/courses/INF176/ +Designed for the AUEB CS BSc Java Course: +https://eclass.aueb.gr/courses/INF176/ -This repository contains a collection of Java programming examples used for teaching core object-oriented programming (OOP) concepts in an engaging and applied way. Each example is organized as a separate package/module, and includes working code, documentation, and console interaction. +This repository contains small, runnable Java examples and course projects used +to teach core programming and object-oriented programming concepts. Topic-based +examples live under `gr/aueb/cs/examples`, while larger mini-projects live under +`gr/aueb/cs/projects`. -## 📁 Project Structure +## Project Structure -Each top-level package contains a complete, runnable Java example: +### `gr/aueb/cs/examples/introduction` ---- +Introductory Java examples covering variables, control flow, simple classes, and +basic simulation. -### 🎲 `montyhall/` +### `gr/aueb/cs/examples/strings` -A full implementation of the Monty Hall game: +Examples for working with Java strings and common string operations. -- OOP structure (`Door`, `MontyHallGame`, `Strategy`) -- Interactive version (console-based) -- Simulator to run thousands of trials -- Visual comparison of strategies (switch vs stay) +### `gr/aueb/cs/examples/inheritance` -➡️ Teaches: classes, interfaces, composition, simulations, user interaction +Examples for inheritance, `final`, dynamic binding, and polymorphism. ---- +### `gr/aueb/cs/examples/abstraction` -### 🚶 `walkroutes/` +Examples for abstract classes and salary-based employee models. -A pedestrian routing system on a city grid: +### `gr/aueb/cs/examples/interfaces` -- Location graph representation -- Obstacle-aware pathfinding -- Modular packages: `model`, `routing`, `map`, `simulation` +Small demonstrations of interfaces and interface-based design. -➡️ Teaches: graphs, modular design, file input, BFS-style logic +### `gr/aueb/cs/examples/collections` ---- +Examples using Java collections such as lists, queues, iterators, and traversal +patterns. -### 🎯 `demo/` +### `gr/aueb/cs/examples/generics` -Demonstrates the difference between: +Examples for generic classes, generic methods, bounded type parameters, +comparators, sorting, and type erasure. -- `Math.random()` (static, simple, no seed) -- `Random` class (object-based, supports seeding) -- Repeatable pseudo-randomness +### `gr/aueb/cs/examples/exceptions` -➡️ Teaches: randomness, testing, debugging with seeded values +Examples for exception handling, throwing exceptions, and safer error handling. ---- +### `gr/aueb/cs/examples/files` -### 🏨 `hotelbooking/` *(optional extension)* +Examples for reading and writing files, UTF-8 text, URLs, and CSV-style input. -Simulates a basic hotel booking system with multiple room types. +### `gr/aueb/cs/examples/unit` -➡️ Teaches: inheritance, encapsulation, polymorphism +A small calculator example with a matching unit test. ---- +### `gr/aueb/cs/examples/profiling` -### 🎬 `movies/` *(optional extension)* +Simple performance and profiling examples comparing data structures, primitive +types, wrapper types, and buffer capacity choices. -Loads movie reviews from a file and filters recommendations by genre, rating, or sentiment. +### `gr/aueb/cs/examples/graphics` -➡️ Teaches: file I/O, `ArrayList`, filtering, basic NLP +Graphical Java examples, including a tag cloud visualization. ---- +### `gr/aueb/cs/examples/sound` -## 🧪 How to Run +Audio-related examples, including a simple alarm demo. -Use the terminal or your favorite IDE (e.g., IntelliJ, Eclipse): +### `gr/aueb/cs/examples/review` + +Review examples for dynamic dispatch, constructors, exceptions, anonymous +classes, and randomness. + +### `gr/aueb/cs/projects` + +Larger examples and student-friendly mini-projects: + +- `montyhall`: Monty Hall game logic, strategies, console UI, and simulation. +- `walkroute`: Walking route demos using linked structures, search, and agents. +- `captcha`: A simple CAPTCHA generator and checker. +- `javagotchi`: A virtual pet project. +- `javagotchiWeb`: A Spring Boot web version of the Javagotchi project. + +## How to Run + +From the repository root, compile and run a single class by using its package +path. For example: ```bash -# Compile from src root -javac montyhall/app/Main.java -java montyhall.app.Main +javac gr/aueb/cs/examples/introduction/Variables.java +java gr.aueb.cs.examples.introduction.Variables +``` + +Another example: + +```bash +javac gr/aueb/cs/examples/inheritance/Polymorphism.java +java gr.aueb.cs.examples.inheritance.Polymorphism +``` -# Or run another example -javac demo/RandomComparison.java -java demo.RandomComparison +For examples that define multiple classes in the same package, compile the +source file and then run the public class: + +```bash +javac gr/aueb/cs/examples/interfaces/Demo.java +java gr.aueb.cs.examples.interfaces.Demo +``` + +The Spring Boot project has its own README: + +```text +gr/aueb/cs/projects/javagotchiWeb/README.md +``` + +## Running Tests + +The `gr/aueb/cs/examples/unit` package contains small JUnit 5 tests for the +calculator example. Run them from the repository root with: + +```bash +mvn test ``` -## ✏️ Contribution +## Contributing -To contribute to this repo, [this cheatsheet](/git_cheatsheet.md) may help with the first steps. +To contribute to this repository, the [Git cheatsheet](git_cheatsheet.md) may +help with the first steps. -## 📄 License +## License This project is licensed under the [MIT License](LICENSE). diff --git a/gr/aueb/cs/abstraction/Employee.java b/gr/aueb/cs/examples/abstraction/Employee.java similarity index 95% rename from gr/aueb/cs/abstraction/Employee.java rename to gr/aueb/cs/examples/abstraction/Employee.java index fee53b8..10adf2e 100644 --- a/gr/aueb/cs/abstraction/Employee.java +++ b/gr/aueb/cs/examples/abstraction/Employee.java @@ -1,5 +1,5 @@ -package gr.aueb.cs.abstraction; +package gr.aueb.cs.examples.abstraction; public abstract class Employee { private String firstName; diff --git a/gr/aueb/cs/abstraction/JuniorSalariedEmployee.java b/gr/aueb/cs/examples/abstraction/JuniorSalariedEmployee.java similarity index 85% rename from gr/aueb/cs/abstraction/JuniorSalariedEmployee.java rename to gr/aueb/cs/examples/abstraction/JuniorSalariedEmployee.java index c93cdb0..9a189fc 100644 --- a/gr/aueb/cs/abstraction/JuniorSalariedEmployee.java +++ b/gr/aueb/cs/examples/abstraction/JuniorSalariedEmployee.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.abstraction; +package gr.aueb.cs.examples.abstraction; abstract public class JuniorSalariedEmployee extends SalariedEmployee { diff --git a/gr/aueb/cs/abstraction/SalariedEmployee.java b/gr/aueb/cs/examples/abstraction/SalariedEmployee.java similarity index 95% rename from gr/aueb/cs/abstraction/SalariedEmployee.java rename to gr/aueb/cs/examples/abstraction/SalariedEmployee.java index 21a3a63..f0ee879 100644 --- a/gr/aueb/cs/abstraction/SalariedEmployee.java +++ b/gr/aueb/cs/examples/abstraction/SalariedEmployee.java @@ -1,5 +1,5 @@ -package gr.aueb.cs.abstraction; +package gr.aueb.cs.examples.abstraction; public class SalariedEmployee extends Employee { private double weeklySalary; diff --git a/gr/aueb/cs/collections/CollectionTest.java b/gr/aueb/cs/examples/collections/CollectionTest.java similarity index 98% rename from gr/aueb/cs/collections/CollectionTest.java rename to gr/aueb/cs/examples/collections/CollectionTest.java index bbe78ea..3be038a 100644 --- a/gr/aueb/cs/collections/CollectionTest.java +++ b/gr/aueb/cs/examples/collections/CollectionTest.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.collections; +package gr.aueb.cs.examples.collections; // // Based on the example in the book of Deitel (pp 834, 9th edition) // https://github.com/pdeitel/JavaHowToProgram11e_EarlyObjects/blob/7bf604beb846d3bb99b52d8b330da5e354a0224a/examples/ch16/fig16_02/CollectionTest.java // Collection interface demonstrated via an ArrayList object. diff --git a/gr/aueb/cs/collections/IndexTraversalError.java b/gr/aueb/cs/examples/collections/IndexTraversalError.java similarity index 93% rename from gr/aueb/cs/collections/IndexTraversalError.java rename to gr/aueb/cs/examples/collections/IndexTraversalError.java index 1eaaa02..f344677 100644 --- a/gr/aueb/cs/collections/IndexTraversalError.java +++ b/gr/aueb/cs/examples/collections/IndexTraversalError.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.collections; +package gr.aueb.cs.examples.collections; import java.util.*; diff --git a/gr/aueb/cs/collections/IteratorTraversalSafe.java b/gr/aueb/cs/examples/collections/IteratorTraversalSafe.java similarity index 93% rename from gr/aueb/cs/collections/IteratorTraversalSafe.java rename to gr/aueb/cs/examples/collections/IteratorTraversalSafe.java index 4391964..b5e6850 100644 --- a/gr/aueb/cs/collections/IteratorTraversalSafe.java +++ b/gr/aueb/cs/examples/collections/IteratorTraversalSafe.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.collections; +package gr.aueb.cs.examples.collections; import java.util.ArrayList; import java.util.Iterator; diff --git a/gr/aueb/cs/collections/ListTest.java b/gr/aueb/cs/examples/collections/ListTest.java similarity index 99% rename from gr/aueb/cs/collections/ListTest.java rename to gr/aueb/cs/examples/collections/ListTest.java index e47d7bf..fb6c12b 100644 --- a/gr/aueb/cs/collections/ListTest.java +++ b/gr/aueb/cs/examples/collections/ListTest.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.collections; +package gr.aueb.cs.examples.collections; // Working on the example of Deitel (pp 837, 9th edition) // re. Lists, LinkedLists and ListIterators. diff --git a/gr/aueb/cs/collections/PriorityQueueTest.java b/gr/aueb/cs/examples/collections/PriorityQueueTest.java similarity index 96% rename from gr/aueb/cs/collections/PriorityQueueTest.java rename to gr/aueb/cs/examples/collections/PriorityQueueTest.java index 2f27f25..2d4f1ef 100644 --- a/gr/aueb/cs/collections/PriorityQueueTest.java +++ b/gr/aueb/cs/examples/collections/PriorityQueueTest.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.collections; +package gr.aueb.cs.examples.collections; import java.util.Comparator; import java.util.PriorityQueue; diff --git a/gr/aueb/cs/exceptions/DivideByZeroSafely.java b/gr/aueb/cs/examples/exceptions/DivideByZeroSafely.java similarity index 96% rename from gr/aueb/cs/exceptions/DivideByZeroSafely.java rename to gr/aueb/cs/examples/exceptions/DivideByZeroSafely.java index 7182ed9..f10d6bf 100644 --- a/gr/aueb/cs/exceptions/DivideByZeroSafely.java +++ b/gr/aueb/cs/examples/exceptions/DivideByZeroSafely.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.exceptions; +package gr.aueb.cs.examples.exceptions; import java.util.InputMismatchException; diff --git a/gr/aueb/cs/exceptions/DivideByZeroWithoutExceptionHandling.java b/gr/aueb/cs/examples/exceptions/DivideByZeroWithoutExceptionHandling.java similarity index 95% rename from gr/aueb/cs/exceptions/DivideByZeroWithoutExceptionHandling.java rename to gr/aueb/cs/examples/exceptions/DivideByZeroWithoutExceptionHandling.java index c98431b..d35559e 100644 --- a/gr/aueb/cs/exceptions/DivideByZeroWithoutExceptionHandling.java +++ b/gr/aueb/cs/examples/exceptions/DivideByZeroWithoutExceptionHandling.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.exceptions; +package gr.aueb.cs.examples.exceptions; import java.util.Scanner; diff --git a/gr/aueb/cs/examples/exceptions/ThrowTest.java b/gr/aueb/cs/examples/exceptions/ThrowTest.java new file mode 100644 index 0000000..d133bdc --- /dev/null +++ b/gr/aueb/cs/examples/exceptions/ThrowTest.java @@ -0,0 +1,11 @@ +package gr.aueb.cs.examples.exceptions; + +public class ThrowTest { + public static void main(String[] args) { + try { + throw new RuntimeException("Σφάλμα!"); + } catch (RuntimeException e) { + System.out.println("Πιάστηκε εξαίρεση: " + e.getMessage()); + } + } +} diff --git a/gr/aueb/cs/files/GreekReaderUTF8.java b/gr/aueb/cs/examples/files/GreekReaderUTF8.java similarity index 75% rename from gr/aueb/cs/files/GreekReaderUTF8.java rename to gr/aueb/cs/examples/files/GreekReaderUTF8.java index 0cff959..c25cd23 100644 --- a/gr/aueb/cs/files/GreekReaderUTF8.java +++ b/gr/aueb/cs/examples/files/GreekReaderUTF8.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.files; +package gr.aueb.cs.examples.files; import java.io.*; @@ -8,7 +8,7 @@ public static void main(String[] args) throws IOException { // δεν είναι ασφαλές για UTF-8. BufferedReader reader = new BufferedReader( new InputStreamReader( - new FileInputStream("greek.txt"), "UTF-8" // δοκιμάστε "ISO-8859-7" για πείραμα + new FileInputStream("gr/aueb/cs/examples/files/greek.txt"), "UTF-8" // δοκιμάστε "ISO-8859-7" για πείραμα ) ); @@ -19,4 +19,4 @@ public static void main(String[] args) throws IOException { reader.close(); } -} \ No newline at end of file +} diff --git a/gr/aueb/cs/files/GreekWriterUTF8.java b/gr/aueb/cs/examples/files/GreekWriterUTF8.java similarity index 68% rename from gr/aueb/cs/files/GreekWriterUTF8.java rename to gr/aueb/cs/examples/files/GreekWriterUTF8.java index 50fac0d..6a9abaf 100644 --- a/gr/aueb/cs/files/GreekWriterUTF8.java +++ b/gr/aueb/cs/examples/files/GreekWriterUTF8.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.files; +package gr.aueb.cs.examples.files; import java.io.*; @@ -7,7 +7,7 @@ public static void main(String[] args) throws IOException { // Δημιουργία Writer με ρητή κωδικοποίηση UTF-8 BufferedWriter writer = new BufferedWriter( new OutputStreamWriter( - new FileOutputStream("greek.txt"), "UTF-8" + new FileOutputStream("gr/aueb/cs/examples/files/greek.txt"), "UTF-8" ) ); @@ -18,6 +18,6 @@ public static void main(String[] args) throws IOException { writer.write("Αυτό είναι δοκιμαστικό αρχείο σε UTF-8."); writer.close(); - System.out.println("Το αρχείο greek.txt γράφτηκε με επιτυχία σε UTF-8."); + System.out.println("Το αρχείο gr/aueb/cs/examples/files/greek.txt γράφτηκε με επιτυχία σε UTF-8."); } } diff --git a/gr/aueb/cs/files/LibraryReader.java b/gr/aueb/cs/examples/files/LibraryReader.java similarity index 92% rename from gr/aueb/cs/files/LibraryReader.java rename to gr/aueb/cs/examples/files/LibraryReader.java index 09bd0ee..1517639 100644 --- a/gr/aueb/cs/files/LibraryReader.java +++ b/gr/aueb/cs/examples/files/LibraryReader.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.files; +package gr.aueb.cs.examples.files; import org.w3c.dom.*; import javax.xml.parsers.*; @@ -7,7 +7,7 @@ public class LibraryReader { public static void main(String[] args) throws Exception { // Βήμα 1: Φόρτωση και parsing του XML - File xmlFile = new File("library.xml"); + File xmlFile = new File("gr/aueb/cs/examples/files/library.xml"); DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); Document doc = builder.parse(xmlFile); diff --git a/gr/aueb/cs/files/RepresentationsTest.java b/gr/aueb/cs/examples/files/RepresentationsTest.java similarity index 97% rename from gr/aueb/cs/files/RepresentationsTest.java rename to gr/aueb/cs/examples/files/RepresentationsTest.java index 07c3846..dcbfc69 100644 --- a/gr/aueb/cs/files/RepresentationsTest.java +++ b/gr/aueb/cs/examples/files/RepresentationsTest.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.files; +package gr.aueb.cs.examples.files; public class RepresentationsTest { diff --git a/gr/aueb/cs/files/URLReader.java b/gr/aueb/cs/examples/files/URLReader.java similarity index 96% rename from gr/aueb/cs/files/URLReader.java rename to gr/aueb/cs/examples/files/URLReader.java index 8bc8711..f8b0abb 100644 --- a/gr/aueb/cs/files/URLReader.java +++ b/gr/aueb/cs/examples/files/URLReader.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.files; +package gr.aueb.cs.examples.files; import java.net.URL; import java.io.BufferedReader; diff --git a/gr/aueb/cs/examples/files/greek.txt b/gr/aueb/cs/examples/files/greek.txt new file mode 100644 index 0000000..2509f23 --- /dev/null +++ b/gr/aueb/cs/examples/files/greek.txt @@ -0,0 +1,3 @@ +Καλημέρα +Πώς είσαι; +Αυτό είναι δοκιμαστικό αρχείο σε UTF-8. \ No newline at end of file diff --git a/gr/aueb/cs/examples/files/library.xml b/gr/aueb/cs/examples/files/library.xml new file mode 100644 index 0000000..7ed40ca --- /dev/null +++ b/gr/aueb/cs/examples/files/library.xml @@ -0,0 +1,10 @@ + + +
+ + +
+
+ +
+ diff --git a/gr/aueb/cs/files/reviews.csv b/gr/aueb/cs/examples/files/reviews.csv similarity index 100% rename from gr/aueb/cs/files/reviews.csv rename to gr/aueb/cs/examples/files/reviews.csv diff --git a/gr/aueb/cs/generics/BoundedTypeParamsTest.java b/gr/aueb/cs/examples/generics/BoundedTypeParamsTest.java similarity index 93% rename from gr/aueb/cs/generics/BoundedTypeParamsTest.java rename to gr/aueb/cs/examples/generics/BoundedTypeParamsTest.java index 344b704..003db3b 100644 --- a/gr/aueb/cs/generics/BoundedTypeParamsTest.java +++ b/gr/aueb/cs/examples/generics/BoundedTypeParamsTest.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.generics; +package gr.aueb.cs.examples.generics; public class BoundedTypeParamsTest { public static void main(String[] args) { diff --git a/gr/aueb/cs/generics/GenericMethodTest.java b/gr/aueb/cs/examples/generics/GenericMethodTest.java similarity index 94% rename from gr/aueb/cs/generics/GenericMethodTest.java rename to gr/aueb/cs/examples/generics/GenericMethodTest.java index 4ad7b3c..86f78ea 100644 --- a/gr/aueb/cs/generics/GenericMethodTest.java +++ b/gr/aueb/cs/examples/generics/GenericMethodTest.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.generics; +package gr.aueb.cs.examples.generics; public class GenericMethodTest { public static void main(String[] args) { diff --git a/gr/aueb/cs/generics/GenericsTest.java b/gr/aueb/cs/examples/generics/GenericsTest.java similarity index 96% rename from gr/aueb/cs/generics/GenericsTest.java rename to gr/aueb/cs/examples/generics/GenericsTest.java index e618774..4fc52bb 100644 --- a/gr/aueb/cs/generics/GenericsTest.java +++ b/gr/aueb/cs/examples/generics/GenericsTest.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.generics; +package gr.aueb.cs.examples.generics; import java.util.ArrayList; diff --git a/gr/aueb/cs/generics/StudentSortingComparatorDemo.java b/gr/aueb/cs/examples/generics/StudentSortingComparatorDemo.java similarity index 98% rename from gr/aueb/cs/generics/StudentSortingComparatorDemo.java rename to gr/aueb/cs/examples/generics/StudentSortingComparatorDemo.java index 1f8c083..ac9026e 100644 --- a/gr/aueb/cs/generics/StudentSortingComparatorDemo.java +++ b/gr/aueb/cs/examples/generics/StudentSortingComparatorDemo.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.generics; +package gr.aueb.cs.examples.generics; import java.util.*; diff --git a/gr/aueb/cs/generics/TypeErasureTest.java b/gr/aueb/cs/examples/generics/TypeErasureTest.java similarity index 88% rename from gr/aueb/cs/generics/TypeErasureTest.java rename to gr/aueb/cs/examples/generics/TypeErasureTest.java index bb7e246..5ad9382 100644 --- a/gr/aueb/cs/generics/TypeErasureTest.java +++ b/gr/aueb/cs/examples/generics/TypeErasureTest.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.generics; +package gr.aueb.cs.examples.generics; import java.util.ArrayList; import java.util.List; diff --git a/gr/aueb/cs/graphics/JavaTagCloud.java b/gr/aueb/cs/examples/graphics/JavaTagCloud.java similarity index 99% rename from gr/aueb/cs/graphics/JavaTagCloud.java rename to gr/aueb/cs/examples/graphics/JavaTagCloud.java index 37cd3ed..23e2f68 100644 --- a/gr/aueb/cs/graphics/JavaTagCloud.java +++ b/gr/aueb/cs/examples/graphics/JavaTagCloud.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.graphics; +package gr.aueb.cs.examples.graphics; import java.awt.*; import java.awt.geom.AffineTransform; diff --git a/gr/aueb/cs/inheritance/DynamicBinding.java b/gr/aueb/cs/examples/inheritance/DynamicBinding.java similarity index 93% rename from gr/aueb/cs/inheritance/DynamicBinding.java rename to gr/aueb/cs/examples/inheritance/DynamicBinding.java index 4d378f1..da32376 100644 --- a/gr/aueb/cs/inheritance/DynamicBinding.java +++ b/gr/aueb/cs/examples/inheritance/DynamicBinding.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.inheritance; +package gr.aueb.cs.examples.inheritance; class Sup { void who() { System.out.println("who() in Sup"); } diff --git a/gr/aueb/cs/inheritance/Final.java b/gr/aueb/cs/examples/inheritance/Final.java similarity index 92% rename from gr/aueb/cs/inheritance/Final.java rename to gr/aueb/cs/examples/inheritance/Final.java index 256ea50..18a56b0 100644 --- a/gr/aueb/cs/inheritance/Final.java +++ b/gr/aueb/cs/examples/inheritance/Final.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.inheritance; +package gr.aueb.cs.examples.inheritance; public class Final { public static void main(String[] args) { diff --git a/gr/aueb/cs/inheritance/Polymorphism.java b/gr/aueb/cs/examples/inheritance/Polymorphism.java similarity index 94% rename from gr/aueb/cs/inheritance/Polymorphism.java rename to gr/aueb/cs/examples/inheritance/Polymorphism.java index dd28a49..4d9a111 100644 --- a/gr/aueb/cs/inheritance/Polymorphism.java +++ b/gr/aueb/cs/examples/inheritance/Polymorphism.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.inheritance; +package gr.aueb.cs.examples.inheritance; class X { int a; diff --git a/gr/aueb/cs/interfaces/Demo.java b/gr/aueb/cs/examples/interfaces/Demo.java similarity index 95% rename from gr/aueb/cs/interfaces/Demo.java rename to gr/aueb/cs/examples/interfaces/Demo.java index e7223c5..97f9c86 100644 --- a/gr/aueb/cs/interfaces/Demo.java +++ b/gr/aueb/cs/examples/interfaces/Demo.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.interfaces; +package gr.aueb.cs.examples.interfaces; interface Testable { void test(); diff --git a/gr/aueb/cs/introduction/BreakAndContinue.java b/gr/aueb/cs/examples/introduction/BreakAndContinue.java similarity index 95% rename from gr/aueb/cs/introduction/BreakAndContinue.java rename to gr/aueb/cs/examples/introduction/BreakAndContinue.java index c890cf0..707062b 100644 --- a/gr/aueb/cs/introduction/BreakAndContinue.java +++ b/gr/aueb/cs/examples/introduction/BreakAndContinue.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.introduction; +package gr.aueb.cs.examples.introduction; public class BreakAndContinue { diff --git a/gr/aueb/cs/introduction/Human.java b/gr/aueb/cs/examples/introduction/Human.java similarity index 95% rename from gr/aueb/cs/introduction/Human.java rename to gr/aueb/cs/examples/introduction/Human.java index ceebfe1..f0c55c3 100644 --- a/gr/aueb/cs/introduction/Human.java +++ b/gr/aueb/cs/examples/introduction/Human.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.introduction; +package gr.aueb.cs.examples.introduction; class Human { diff --git a/gr/aueb/cs/introduction/Simulator.java b/gr/aueb/cs/examples/introduction/Simulator.java similarity index 89% rename from gr/aueb/cs/introduction/Simulator.java rename to gr/aueb/cs/examples/introduction/Simulator.java index dbb6284..c264d95 100644 --- a/gr/aueb/cs/introduction/Simulator.java +++ b/gr/aueb/cs/examples/introduction/Simulator.java @@ -1,11 +1,8 @@ -package gr.aueb.cs.introduction; +package gr.aueb.cs.examples.introduction; -class Simulator { +public class Simulator { protected static float time; protected int x; -} - -class SimulatorDemo { public static void main(String [] args){ @@ -22,4 +19,4 @@ public static void main(String [] args){ System.out.println("static variable time can be accessed through class name, Simulator.time: " + Simulator.time + ", ob1.time: " + ob1.time + ", ob2.time:" + ob2.time); } -} \ No newline at end of file +} diff --git a/gr/aueb/cs/introduction/Variables.java b/gr/aueb/cs/examples/introduction/Variables.java similarity index 98% rename from gr/aueb/cs/introduction/Variables.java rename to gr/aueb/cs/examples/introduction/Variables.java index ff83738..6e06ea8 100644 --- a/gr/aueb/cs/introduction/Variables.java +++ b/gr/aueb/cs/examples/introduction/Variables.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.introduction; +package gr.aueb.cs.examples.introduction; public class Variables { diff --git a/gr/aueb/cs/profiling/ArrayListVsVectorBenchmark.java b/gr/aueb/cs/examples/profiling/ArrayListVsVectorBenchmark.java similarity index 96% rename from gr/aueb/cs/profiling/ArrayListVsVectorBenchmark.java rename to gr/aueb/cs/examples/profiling/ArrayListVsVectorBenchmark.java index ac43283..254da02 100644 --- a/gr/aueb/cs/profiling/ArrayListVsVectorBenchmark.java +++ b/gr/aueb/cs/examples/profiling/ArrayListVsVectorBenchmark.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.profiling; +package gr.aueb.cs.examples.profiling; import java.util.ArrayList; import java.util.Vector; diff --git a/gr/aueb/cs/profiling/EnsureCapacityDemo.java b/gr/aueb/cs/examples/profiling/EnsureCapacityDemo.java similarity index 96% rename from gr/aueb/cs/profiling/EnsureCapacityDemo.java rename to gr/aueb/cs/examples/profiling/EnsureCapacityDemo.java index 44c5cd9..4c48f31 100644 --- a/gr/aueb/cs/profiling/EnsureCapacityDemo.java +++ b/gr/aueb/cs/examples/profiling/EnsureCapacityDemo.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.profiling; +package gr.aueb.cs.examples.profiling; import java.util.ArrayList; diff --git a/gr/aueb/cs/profiling/PrimitiveVsWrapperBenchmark.java b/gr/aueb/cs/examples/profiling/PrimitiveVsWrapperBenchmark.java similarity index 96% rename from gr/aueb/cs/profiling/PrimitiveVsWrapperBenchmark.java rename to gr/aueb/cs/examples/profiling/PrimitiveVsWrapperBenchmark.java index d4f4d34..f86b1e7 100644 --- a/gr/aueb/cs/profiling/PrimitiveVsWrapperBenchmark.java +++ b/gr/aueb/cs/examples/profiling/PrimitiveVsWrapperBenchmark.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.profiling; +package gr.aueb.cs.examples.profiling; public class PrimitiveVsWrapperBenchmark { public static void main(String[] args) { diff --git a/gr/aueb/cs/profiling/ReadSpeedTest.java b/gr/aueb/cs/examples/profiling/ReadSpeedTest.java similarity index 96% rename from gr/aueb/cs/profiling/ReadSpeedTest.java rename to gr/aueb/cs/examples/profiling/ReadSpeedTest.java index df1eb8a..d9e7624 100644 --- a/gr/aueb/cs/profiling/ReadSpeedTest.java +++ b/gr/aueb/cs/examples/profiling/ReadSpeedTest.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.profiling; +package gr.aueb.cs.examples.profiling; import java.io.*; @@ -41,7 +41,7 @@ public static long readWithFileInputStreamAndDIYBuffer(String filename) throws I int bytesRead = in.read(buffer, 0, buffer.length); while (bytesRead != -1) { - // διαβάζουμε byte-προς-byte + bytesRead = in.read(buffer, 0, buffer.length); } in.close(); @@ -68,4 +68,4 @@ public static void writeBigFile(String filename) throws IOException { } f.close(); } -} \ No newline at end of file +} diff --git a/gr/aueb/cs/review/AnonymousClassTest.java b/gr/aueb/cs/examples/review/AnonymousClassTest.java similarity index 97% rename from gr/aueb/cs/review/AnonymousClassTest.java rename to gr/aueb/cs/examples/review/AnonymousClassTest.java index 0144318..6709227 100644 --- a/gr/aueb/cs/review/AnonymousClassTest.java +++ b/gr/aueb/cs/examples/review/AnonymousClassTest.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.review; +package gr.aueb.cs.examples.review; public class AnonymousClassTest { diff --git a/gr/aueb/cs/review/ConstructorBuildingTest.java b/gr/aueb/cs/examples/review/ConstructorBuildingTest.java similarity index 98% rename from gr/aueb/cs/review/ConstructorBuildingTest.java rename to gr/aueb/cs/examples/review/ConstructorBuildingTest.java index bea3b70..48a133d 100644 --- a/gr/aueb/cs/review/ConstructorBuildingTest.java +++ b/gr/aueb/cs/examples/review/ConstructorBuildingTest.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.review; +package gr.aueb.cs.examples.review; import java.util.ArrayList; diff --git a/gr/aueb/cs/review/DynamicDispatchTest.java b/gr/aueb/cs/examples/review/DynamicDispatchTest.java similarity index 91% rename from gr/aueb/cs/review/DynamicDispatchTest.java rename to gr/aueb/cs/examples/review/DynamicDispatchTest.java index c9c6090..01b867a 100644 --- a/gr/aueb/cs/review/DynamicDispatchTest.java +++ b/gr/aueb/cs/examples/review/DynamicDispatchTest.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.review; +package gr.aueb.cs.examples.review; class A{ public void method() { diff --git a/gr/aueb/cs/review/ExceptionTest.java b/gr/aueb/cs/examples/review/ExceptionTest.java similarity index 93% rename from gr/aueb/cs/review/ExceptionTest.java rename to gr/aueb/cs/examples/review/ExceptionTest.java index dd10bdb..d5fa8a0 100644 --- a/gr/aueb/cs/review/ExceptionTest.java +++ b/gr/aueb/cs/examples/review/ExceptionTest.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.review; +package gr.aueb.cs.examples.review; class ExceptionTest { static int a; diff --git a/gr/aueb/cs/review/RandomTest.java b/gr/aueb/cs/examples/review/RandomTest.java similarity index 96% rename from gr/aueb/cs/review/RandomTest.java rename to gr/aueb/cs/examples/review/RandomTest.java index 1d54003..c5bb226 100644 --- a/gr/aueb/cs/review/RandomTest.java +++ b/gr/aueb/cs/examples/review/RandomTest.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.review; +package gr.aueb.cs.examples.review; import java.util.Random; diff --git a/gr/aueb/cs/sound/ZooAlarm.java b/gr/aueb/cs/examples/sound/ZooAlarm.java similarity index 97% rename from gr/aueb/cs/sound/ZooAlarm.java rename to gr/aueb/cs/examples/sound/ZooAlarm.java index 01f4181..f0d6949 100644 --- a/gr/aueb/cs/sound/ZooAlarm.java +++ b/gr/aueb/cs/examples/sound/ZooAlarm.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.sound; +package gr.aueb.cs.examples.sound; import java.awt.Toolkit; public class ZooAlarm { diff --git a/gr/aueb/cs/strings/StringPlay.java b/gr/aueb/cs/examples/strings/StringPlay.java similarity index 83% rename from gr/aueb/cs/strings/StringPlay.java rename to gr/aueb/cs/examples/strings/StringPlay.java index c2394c5..bbe2b36 100644 --- a/gr/aueb/cs/strings/StringPlay.java +++ b/gr/aueb/cs/examples/strings/StringPlay.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.strings; +package gr.aueb.cs.examples.strings; public class StringPlay { public static void main(String[] args) { diff --git a/gr/aueb/cs/unit/Calculator.java b/gr/aueb/cs/examples/unit/Calculator.java similarity index 91% rename from gr/aueb/cs/unit/Calculator.java rename to gr/aueb/cs/examples/unit/Calculator.java index 23cd307..938d72e 100644 --- a/gr/aueb/cs/unit/Calculator.java +++ b/gr/aueb/cs/examples/unit/Calculator.java @@ -1,4 +1,4 @@ -package gr.aueb.cs.unit; +package gr.aueb.cs.examples.unit; public class Calculator { diff --git a/gr/aueb/cs/unit/CalculatorTest.java b/gr/aueb/cs/examples/unit/CalculatorTest.java similarity index 61% rename from gr/aueb/cs/unit/CalculatorTest.java rename to gr/aueb/cs/examples/unit/CalculatorTest.java index bb6d78f..5ee57c4 100644 --- a/gr/aueb/cs/unit/CalculatorTest.java +++ b/gr/aueb/cs/examples/unit/CalculatorTest.java @@ -1,8 +1,9 @@ -package gr.aueb.cs.unit; +package gr.aueb.cs.examples.unit; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.DisplayName; import org.junit.jupiter.api.Test; + import static org.junit.jupiter.api.Assertions.*; class CalculatorTest { @@ -22,18 +23,33 @@ void testAdd() { assertEquals(5, result, "Η πρόσθεση θα έπρεπε να επιστρέφει 5"); } + @Test + @DisplayName("Έλεγχος πρόσθεσης με αρνητικούς αριθμούς") + void testAddNegativeNumbers() { + assertEquals(-7, calculator.add(-2, -5)); + assertEquals(3, calculator.add(10, -7)); + } + @Test @DisplayName("Έλεγχος διαίρεσης") void testDivide() { assertEquals(2.0, calculator.divide(10, 5)); } + @Test + @DisplayName("Έλεγχος διαίρεσης με δεκαδικό αποτέλεσμα") + void testDivideWithDecimalResult() { + assertEquals(2.5, calculator.divide(5, 2)); + } + @Test @DisplayName("Έλεγχος εξαίρεσης (Exception) στη διαίρεση με το μηδέν") void testDivideByZero() { - assertThrows(ArithmeticException.class, () -> { + ArithmeticException exception = assertThrows(ArithmeticException.class, () -> { calculator.divide(10, 0); }, "Θα έπρεπε να πετάει ArithmeticException"); + + assertEquals("Δεν μπορείς να διαιρέσεις με το μηδέν!", exception.getMessage()); } -} \ No newline at end of file +} diff --git a/gr/aueb/cs/exceptions/ThrowTest.java b/gr/aueb/cs/exceptions/ThrowTest.java deleted file mode 100644 index ac09d18..0000000 --- a/gr/aueb/cs/exceptions/ThrowTest.java +++ /dev/null @@ -1,7 +0,0 @@ -package gr.aueb.cs.exceptions; - -public class ThrowTest { - public static void main(String[] args) { - throw new RuntimeException("Σφάλμα!"); - } -} \ No newline at end of file diff --git a/pom.xml b/pom.xml new file mode 100644 index 0000000..09fb59d --- /dev/null +++ b/pom.xml @@ -0,0 +1,52 @@ + + 4.0.0 + + gr.aueb.cs + java-examples + 1.0-SNAPSHOT + + + 17 + UTF-8 + 5.10.2 + + + + + org.junit.jupiter + junit-jupiter + ${junit.jupiter.version} + test + + + + + ${project.basedir} + ${project.basedir} + + + + maven-compiler-plugin + 3.13.0 + + + gr/aueb/cs/examples/unit/**/*.java + + + **/*Test.java + + + gr/aueb/cs/examples/unit/**/*Test.java + + + + + + maven-surefire-plugin + 3.2.5 + + + +