Lab completed

lab-java-interfaces-and-abstract-classes/.gitignore

@@ -0,0 +1,39 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+.kotlin
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

lab-java-interfaces-and-abstract-classes/pom.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.example</groupId>
+    <artifactId>lab-java-interfaces-and-abstract-classes</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+</project>

lab-java-interfaces-and-abstract-classes/src/main/java/org/example/BigDecimalOperations.java

@@ -0,0 +1,18 @@
+package org.example;
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+public class BigDecimalOperations {
+    public double roundedToTheNearestHundredth(BigDecimal number){
+        BigDecimal roundedNumber = number.setScale(2, RoundingMode.HALF_UP);
+        double doubleValue = roundedNumber.doubleValue();
+        return doubleValue;
+    }
+    public double reverseTheSignAndRoundNearestTenth(BigDecimal number){
+        BigDecimal roundedNumber = number.setScale(1, RoundingMode.HALF_UP);
+        double doubleValue = -roundedNumber.doubleValue();
+        return doubleValue;
+    }
+
+
+}

lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Car.java

@@ -0,0 +1,45 @@
+package org.example;
+
+public abstract class Car {
+    protected String vinNumber;
+    protected String make;
+    protected String model;
+    protected int milage;
+
+    public Car(String vinNumber, String make, String model, int milage) {
+        this.vinNumber = vinNumber;
+        this.make = make;
+        this.model = model;
+        this.milage = milage;
+    }
+
+    public String getInfo(){
+        return "vinNumber: " + vinNumber + "\nmake: " + make + "\nmodel: " + model + "\nmilage: " + milage;
+    }
+
+    public String getVinNumber(){
+        return vinNumber;
+    }
+    public String getMake(){
+        return make;
+    }
+    public String getModel(){
+        return model;
+    }
+    public int getMilage(){
+        return milage;
+    }
+
+    public void setVinNumber(String vinNumber){
+        this.vinNumber = vinNumber;
+    }
+    public void setMake(String make){
+        this.make = make;
+    }
+    public void setModel(String model){
+        this.model = model;
+    }
+    public void setMilage(int milage){
+        this.milage = milage;
+    }
+}

lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntArrayList.java

@@ -0,0 +1,39 @@
+package org.example;
+
+import java.sql.Array;
+import java.util.ArrayList;
+
+public class IntArrayList implements IntList{
+    private int[] data;
+    private int size;
+
+    public IntArrayList() {
+        data = new int[10];
+        size = 0;
+    }
+
+    @Override
+    public void add(int number) {
+        if (size == data.length) {
+            int newCapacity = data.length + data.length / 2;
+            int[] newData = new int[newCapacity];
+
+            for (int i = 0; i < data.length; i++) {
+                newData[i] = data[i];
+            }
+
+            data = newData;
+        }
+
+        data[size] = number;
+        size++;
+    }
+
+    @Override
+    public int get(int id) {
+        if (id < 0 || id >= size) {
+            throw new IndexOutOfBoundsException("Invalid index");
+        }
+        return data[id];
+    }
+}

lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntList.java

@@ -0,0 +1,6 @@
+package org.example;
+
+public interface IntList {
+    void add(int number);
+    int get(int id);
+}

lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntVector.java

@@ -0,0 +1,36 @@
+package org.example;
+
+public class VectorList implements IntList{
+    private int[] data;
+    private int size;
+
+    public IntVector() {
+        data = new int[20];
+        size = 0;
+    }
+
+    @Override
+    public void add(int number) {
+        if (size == data.length) {
+            int newCapacity = data.length * 2;
+            int[] newData = new int[newCapacity];
+
+            for (int i = 0; i < data.length; i++) {
+                newData[i] = data[i];
+            }
+
+            data = newData;
+        }
+
+        data[size] = number;
+        size++;
+    }
+
+    @Override
+    public int get(int id) {
+        if (id < 0 || id >= size) {
+            throw new IndexOutOfBoundsException("Invalid index");
+        }
+        return data[id];
+    }
+}

lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Main.java

@@ -0,0 +1,30 @@
+package org.example;
+import java.math.BigDecimal;
+
+public class Main {
+    public static void main(String[] args) {
+        BigDecimalOperations operations = new BigDecimalOperations();
+        BigDecimal number = new BigDecimal(34.4564);
+        double result1 = operations.roundedToTheNearestHundredth(number);
+        double result2 = operations.reverseTheSignAndRoundNearestTenth(number);
+
+        System.out.println("Rounded to the nearest hundredth: " + result1 + "\nReverse the sign and rounded to nearest tenth: " + result2);
+
+        Truck truck = new Truck("VIN123321123213231", "Truck make", "Truck model", 323232,500);
+        Sedan sedan = new Sedan("VIN123346656476761", "Sedan make", "Sedan model", 23122);
+        UtilityVehicle utilityVehicle = new UtilityVehicle("VIN1324343346656476761", "Utility Vehicle make", "Utility Vehicle model", 2000, true);
+
+        System.out.println("\n" + truck.getInfo());
+        System.out.println("\n" + sedan.getInfo());
+        System.out.println("\n" + utilityVehicle.getInfo());
+
+        TvSeries tvSeries = new TvSeries("Game of Thrones", 54, 64 );
+        Movie movie = new Movie("Lord of the Rings",378,4.94);
+
+        System.out.println("\n" + tvSeries.getInfo());
+        System.out.println("\n" + movie.getInfo());
+
+
+
+    }
+}

lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Movie.java

@@ -0,0 +1,15 @@
+package org.example;
+
+public class Movie extends Video {
+    private double rating;
+
+    public Movie(String title, int duration, double rating){
+        super(title, duration);
+        this.rating = rating;
+    }
+
+    @Override
+    public String getInfo(){
+        return "\nTitle: " + title + "\nDuration: " + duration + "\nRating: " + rating;
+    }
+}

lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Sedan.java

@@ -0,0 +1,7 @@
+package org.example;
+
+public class Sedan extends Car {
+    public Sedan(String vinNumber, String make, String model, int milage){
+        super(vinNumber, make, model, milage);
+    }
+}

lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Truck.java

@@ -0,0 +1,15 @@
+package org.example;
+
+public class Truck extends Car {
+    private double towingCapacity;
+
+    public Truck(String vinNumber, String make, String model, int milage, double towingCapacity){
+        super(vinNumber, make, model, milage);
+        this.towingCapacity = towingCapacity;
+    }
+
+    @Override
+    public String getInfo(){
+        return "vinNumber: " + vinNumber + "\nmake: " + make + "\nmodel: " + model + "\nmilage: " + milage + "\ntowing capacity: " + towingCapacity;
+    }
+}

lab-java-interfaces-and-abstract-classes/src/main/java/org/example/TvSeries.java

@@ -0,0 +1,15 @@
+package org.example;
+
+public class TvSeries extends Video {
+    private int episodes;
+
+    public TvSeries(String title, int duration, int episodes){
+        super(title, duration);
+        this.episodes = episodes;
+    }
+
+    @Override
+    public String getInfo(){
+        return "\nTitle: " + title + "\nDuration: " + duration + "\nEpisodes: " + episodes;
+    }
+}