From 37c588fe7c37b45682df3fce7544b282749c68d2 Mon Sep 17 00:00:00 2001
From: shaig-mahmudov <zyphorix.official@gmail.com>
Date: Mon, 23 Feb 2026 05:41:33 -0800
Subject: [PATCH 1/2] add: complete lab

---
 .../.gitignore                                | 39 ++++++++++++++++
 .../.idea/.gitignore                          | 10 +++++
 .../.idea/encodings.xml                       |  7 +++
 .../.idea/misc.xml                            | 14 ++++++
 .../.idea/vcs.xml                             |  6 +++
 .../pom.xml                                   | 17 +++++++
 .../org/example/BigDecimalOperations.java     | 18 ++++++++
 .../src/main/java/org/example/Car.java        | 45 +++++++++++++++++++
 .../main/java/org/example/IntArrayList.java   | 27 +++++++++++
 .../src/main/java/org/example/IntList.java    |  6 +++
 .../src/main/java/org/example/Main.java       | 30 +++++++++++++
 .../src/main/java/org/example/Movie.java      | 15 +++++++
 .../src/main/java/org/example/Sedan.java      |  7 +++
 .../src/main/java/org/example/Truck.java      | 15 +++++++
 .../src/main/java/org/example/TvSeries.java   | 15 +++++++
 .../main/java/org/example/UtilityVehicle.java | 15 +++++++
 .../src/main/java/org/example/VectorList.java | 13 ++++++
 .../src/main/java/org/example/Video.java      | 15 +++++++
 18 files changed, 314 insertions(+)
 create mode 100644 lab-java-interfaces-and-abstract-classes/.gitignore
 create mode 100644 lab-java-interfaces-and-abstract-classes/.idea/.gitignore
 create mode 100644 lab-java-interfaces-and-abstract-classes/.idea/encodings.xml
 create mode 100644 lab-java-interfaces-and-abstract-classes/.idea/misc.xml
 create mode 100644 lab-java-interfaces-and-abstract-classes/.idea/vcs.xml
 create mode 100644 lab-java-interfaces-and-abstract-classes/pom.xml
 create mode 100644 lab-java-interfaces-and-abstract-classes/src/main/java/org/example/BigDecimalOperations.java
 create mode 100644 lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Car.java
 create mode 100644 lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntArrayList.java
 create mode 100644 lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntList.java
 create mode 100644 lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Main.java
 create mode 100644 lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Movie.java
 create mode 100644 lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Sedan.java
 create mode 100644 lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Truck.java
 create mode 100644 lab-java-interfaces-and-abstract-classes/src/main/java/org/example/TvSeries.java
 create mode 100644 lab-java-interfaces-and-abstract-classes/src/main/java/org/example/UtilityVehicle.java
 create mode 100644 lab-java-interfaces-and-abstract-classes/src/main/java/org/example/VectorList.java
 create mode 100644 lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Video.java

diff --git a/lab-java-interfaces-and-abstract-classes/.gitignore b/lab-java-interfaces-and-abstract-classes/.gitignore
new file mode 100644
index 0000000..480bdf5
--- /dev/null
+++ b/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
\ No newline at end of file
diff --git a/lab-java-interfaces-and-abstract-classes/.idea/.gitignore b/lab-java-interfaces-and-abstract-classes/.idea/.gitignore
new file mode 100644
index 0000000..ab1f416
--- /dev/null
+++ b/lab-java-interfaces-and-abstract-classes/.idea/.gitignore
@@ -0,0 +1,10 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Ignored default folder with query files
+/queries/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# Editor-based HTTP Client requests
+/httpRequests/
diff --git a/lab-java-interfaces-and-abstract-classes/.idea/encodings.xml b/lab-java-interfaces-and-abstract-classes/.idea/encodings.xml
new file mode 100644
index 0000000..aa00ffa
--- /dev/null
+++ b/lab-java-interfaces-and-abstract-classes/.idea/encodings.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/lab-java-interfaces-and-abstract-classes/.idea/misc.xml b/lab-java-interfaces-and-abstract-classes/.idea/misc.xml
new file mode 100644
index 0000000..fdc35ea
--- /dev/null
+++ b/lab-java-interfaces-and-abstract-classes/.idea/misc.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/lab-java-interfaces-and-abstract-classes/.idea/vcs.xml b/lab-java-interfaces-and-abstract-classes/.idea/vcs.xml
new file mode 100644
index 0000000..6c0b863
--- /dev/null
+++ b/lab-java-interfaces-and-abstract-classes/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/lab-java-interfaces-and-abstract-classes/pom.xml b/lab-java-interfaces-and-abstract-classes/pom.xml
new file mode 100644
index 0000000..8b4f86a
--- /dev/null
+++ b/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>
\ No newline at end of file
diff --git a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/BigDecimalOperations.java b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/BigDecimalOperations.java
new file mode 100644
index 0000000..2f3c6d5
--- /dev/null
+++ b/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;
+    }
+
+
+}
diff --git a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Car.java b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Car.java
new file mode 100644
index 0000000..0b06212
--- /dev/null
+++ b/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;
+    }
+}
diff --git a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntArrayList.java b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntArrayList.java
new file mode 100644
index 0000000..19f1d6e
--- /dev/null
+++ b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntArrayList.java
@@ -0,0 +1,27 @@
+package org.example;
+
+import java.sql.Array;
+import java.util.ArrayList;
+
+public class IntArrayList implements IntList{
+    int[] numbers = new int[10];
+    int size = 0;
+
+    @Override
+    public void add(int number) {
+        if (size < numbers.length){
+            numbers[size] = number;
+            size++;
+        } else {
+            int newSize = size + (size/2);
+            int[] newNumbers = new int[newSize];
+            newNumbers[newSize] = number;
+            newSize++;
+        }
+    }
+
+    @Override
+    public int get(int id) {
+        return 0;
+    }
+}
diff --git a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntList.java b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntList.java
new file mode 100644
index 0000000..b79d2d0
--- /dev/null
+++ b/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);
+}
diff --git a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Main.java b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Main.java
new file mode 100644
index 0000000..4aec2ce
--- /dev/null
+++ b/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());
+
+
+
+    }
+}
\ No newline at end of file
diff --git a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Movie.java b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Movie.java
new file mode 100644
index 0000000..fe7a48d
--- /dev/null
+++ b/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;
+    }
+}
diff --git a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Sedan.java b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Sedan.java
new file mode 100644
index 0000000..9a2d522
--- /dev/null
+++ b/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);
+    }
+}
diff --git a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Truck.java b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Truck.java
new file mode 100644
index 0000000..677b3fb
--- /dev/null
+++ b/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;
+    }
+}
diff --git a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/TvSeries.java b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/TvSeries.java
new file mode 100644
index 0000000..a6b359c
--- /dev/null
+++ b/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;
+    }
+}
diff --git a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/UtilityVehicle.java b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/UtilityVehicle.java
new file mode 100644
index 0000000..8a0e8f1
--- /dev/null
+++ b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/UtilityVehicle.java
@@ -0,0 +1,15 @@
+package org.example;
+
+public class UtilityVehicle extends Car {
+    private boolean fourWheelDrive;
+
+    public UtilityVehicle(String vinNumber, String make, String model, int milage, boolean fourWheelDrive){
+        super(vinNumber, make, model, milage);
+        this.fourWheelDrive = fourWheelDrive;
+    }
+
+    @Override
+    public String getInfo(){
+        return "vinNumber: " + vinNumber + "\nmake: " + make + "\nmodel: " + model + "\nmilage: " + milage + "\nfour wheel drive: " + fourWheelDrive;
+    }
+}
diff --git a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/VectorList.java b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/VectorList.java
new file mode 100644
index 0000000..4b6bb43
--- /dev/null
+++ b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/VectorList.java
@@ -0,0 +1,13 @@
+package org.example;
+
+public class VectorList implements IntList{
+    @Override
+    public void add(int number) {
+
+    }
+
+    @Override
+    public int get(int id) {
+        return 0;
+    }
+}
diff --git a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Video.java b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Video.java
new file mode 100644
index 0000000..a89dafa
--- /dev/null
+++ b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/Video.java
@@ -0,0 +1,15 @@
+package org.example;
+
+public abstract class Video {
+    protected String title;
+    protected int duration;
+
+    public Video(String title, int duration){
+        this.title = title;
+        this.duration = duration;
+    }
+
+    public String getInfo(){
+        return "\nTitle" + title + "\nDuration" + duration;
+    }
+}

From 03fc98bcd8a07d869d4d7fb66c75ac48ad02e345 Mon Sep 17 00:00:00 2001
From: dev-shaig <shaigfm-apa101@code.edu.az>
Date: Tue, 24 Feb 2026 12:27:50 +0400
Subject: [PATCH 2/2] fixed the last task

---
 .idea/.gitignore                              | 10 ++++++
 ...b-java-interfaces-and-abstract-classes.iml |  9 +++++
 .idea/misc.xml                                |  6 ++++
 .idea/modules.xml                             |  8 +++++
 .idea/vcs.xml                                 |  6 ++++
 .../main/java/org/example/IntArrayList.java   | 34 ++++++++++++------
 .../src/main/java/org/example/IntVector.java  | 36 +++++++++++++++++++
 .../src/main/java/org/example/VectorList.java | 13 -------
 8 files changed, 98 insertions(+), 24 deletions(-)
 create mode 100644 .idea/.gitignore
 create mode 100644 .idea/lab-java-interfaces-and-abstract-classes.iml
 create mode 100644 .idea/misc.xml
 create mode 100644 .idea/modules.xml
 create mode 100644 .idea/vcs.xml
 create mode 100644 lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntVector.java
 delete mode 100644 lab-java-interfaces-and-abstract-classes/src/main/java/org/example/VectorList.java

diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..ab1f416
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,10 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Ignored default folder with query files
+/queries/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# Editor-based HTTP Client requests
+/httpRequests/
diff --git a/.idea/lab-java-interfaces-and-abstract-classes.iml b/.idea/lab-java-interfaces-and-abstract-classes.iml
new file mode 100644
index 0000000..d6ebd48
--- /dev/null
+++ b/.idea/lab-java-interfaces-and-abstract-classes.iml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..20f033c
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" project-jdk-name="21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..ff55171
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/lab-java-interfaces-and-abstract-classes.iml" filepath="$PROJECT_DIR$/.idea/lab-java-interfaces-and-abstract-classes.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntArrayList.java b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntArrayList.java
index 19f1d6e..b130758 100644
--- a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntArrayList.java
+++ b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntArrayList.java
@@ -4,24 +4,36 @@
 import java.util.ArrayList;
 
 public class IntArrayList implements IntList{
-    int[] numbers = new int[10];
-    int size = 0;
+    private int[] data;
+    private int size;
+
+    public IntArrayList() {
+        data = new int[10];
+        size = 0;
+    }
 
     @Override
     public void add(int number) {
-        if (size < numbers.length){
-            numbers[size] = number;
-            size++;
-        } else {
-            int newSize = size + (size/2);
-            int[] newNumbers = new int[newSize];
-            newNumbers[newSize] = number;
-            newSize++;
+        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) {
-        return 0;
+        if (id < 0 || id >= size) {
+            throw new IndexOutOfBoundsException("Invalid index");
+        }
+        return data[id];
     }
 }
diff --git a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntVector.java b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/IntVector.java
new file mode 100644
index 0000000..bfbf751
--- /dev/null
+++ b/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];
+    }
+}
diff --git a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/VectorList.java b/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/VectorList.java
deleted file mode 100644
index 4b6bb43..0000000
--- a/lab-java-interfaces-and-abstract-classes/src/main/java/org/example/VectorList.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package org.example;
-
-public class VectorList implements IntList{
-    @Override
-    public void add(int number) {
-
-    }
-
-    @Override
-    public int get(int id) {
-        return 0;
-    }
-}