diff --git a/src/main/java/core/basesyntax/ArrayList.java b/src/main/java/core/basesyntax/ArrayList.java
index 8d6477943..94364fc1a 100644
--- a/src/main/java/core/basesyntax/ArrayList.java
+++ b/src/main/java/core/basesyntax/ArrayList.java
@@ -1,48 +1,109 @@
 package core.basesyntax;
 
+import java.util.NoSuchElementException;
+
 public class ArrayList<T> implements List<T> {
+    private static final int BASE_SIZE = 10;
+    private static final double CAPACITY_INDEX = 1.5;
+    private T[] elements;
+    private int size;
+
+    public ArrayList() {
+        elements = (T[]) new Object[BASE_SIZE];
+    }
+
     @Override
     public void add(T value) {
-
+        resize();
+        elements[size] = value;
+        size++;
     }
 
     @Override
     public void add(T value, int index) {
-
+        checkAddIndex(index);
+        resize();
+        System.arraycopy(elements, index, elements, index + 1, size - index);
+        elements[index] = value;
+        size++;
     }
 
     @Override
     public void addAll(List<T> list) {
-
+        for (int i = 0; i < list.size(); ++i) {
+            add(list.get(i));
+        }
     }
 
     @Override
     public T get(int index) {
-        return null;
+        checkIndex(index);
+        return elements[index];
     }
 
     @Override
     public void set(T value, int index) {
-
+        checkIndex(index);
+        elements[index] = value;
     }
 
     @Override
     public T remove(int index) {
-        return null;
+        checkIndex(index);
+        T removedElement = elements[index];
+        System.arraycopy(elements, index + 1, elements, index, size - index - 1);
+        size--;
+        return removedElement;
     }
 
     @Override
     public T remove(T element) {
-        return null;
+        int index = findElement(element);
+        remove(index);
+        return element;
     }
 
     @Override
     public int size() {
-        return 0;
+        return size;
     }
 
     @Override
     public boolean isEmpty() {
-        return false;
+        return size == 0;
+    }
+
+    private void resize() {
+        if (size == elements.length) {
+            int newLength = (int) (elements.length * CAPACITY_INDEX);
+            Object[] newArray = new Object[(int) newLength];
+            System.arraycopy(elements, 0, newArray, 0, elements.length);
+            elements = (T[]) newArray;
+        }
+    }
+
+    private int findElement(T element) {
+        for (int i = 0; i < size; ++i) {
+            if (element == elements[i]
+                    || (element != null && element.equals(elements[i]))) {
+                return i;
+            }
+        }
+        throw new NoSuchElementException("You're trying to remove element \""
+                + element + "\", that is not present in the list");
+    }
+
+    private void checkIndex(int index) {
+        if (index < 0 || index >= size) {
+            throw new ArrayListIndexOutOfBoundsException("Can't reach element on position "
+                    + index + " in a list with size of " + size + " .");
+        }
+    }
+
+    private void checkAddIndex(int index) {
+        if (index < 0 || index > size) {
+            throw new ArrayListIndexOutOfBoundsException("Can't add element to position "
+                    + index + " in a list with size of " + size + " .");
+        }
     }
 }