From e9680d110003a2d95ccaec01e4c678d3b659496b Mon Sep 17 00:00:00 2001
From: Brynkiewicz <michal.brynkiewicz@envistaco.com>
Date: Wed, 8 Apr 2026 22:38:25 +0200
Subject: [PATCH 1/6] first solution

---
 src/main/java/core/basesyntax/MyHashMap.java | 94 +++++++++++++++++++-
 1 file changed, 92 insertions(+), 2 deletions(-)

diff --git a/src/main/java/core/basesyntax/MyHashMap.java b/src/main/java/core/basesyntax/MyHashMap.java
index d9beffedf..ddf13d9d1 100644
--- a/src/main/java/core/basesyntax/MyHashMap.java
+++ b/src/main/java/core/basesyntax/MyHashMap.java
@@ -1,19 +1,109 @@
 package core.basesyntax;
 
+import java.util.Map;
+import java.util.Objects;
+
 public class MyHashMap<K, V> implements MyMap<K, V> {
+    private static final int DEFAULT_INITIAL_CAPACITY = 16;
+    private static final float DEFAULT_LOAD_FACTOR = 0.75f;
+    static class Node<K, V> implements Map.Entry<K, V> {
+        private final int hash;
+        private final K key;
+        private V value;
+        private Node<K, V> next;
+        Node(int hash, K key, V value, Node<K, V> next) {
+            this.hash = hash;
+            this.key = key;
+            this.value = value;
+            this.next = next;
+        }
+
+        @Override
+        public K getKey() {
+            return key;
+        }
+
+        @Override
+        public V getValue() {
+            return value;
+        }
+
+        @Override
+        public V setValue(V value) {
+            V oldValue = this.value;
+            this.value = value;
+            return oldValue;
+        }
+    }
+
+    private Node<K, V>[] table;
+    private int size;
+    private int threshold;
+    public MyHashMap() {
+        table = new Node[DEFAULT_INITIAL_CAPACITY];
+        threshold = (int) (DEFAULT_INITIAL_CAPACITY * DEFAULT_LOAD_FACTOR);
+    }
+
+    private int hash(K key) {
+        return key == null ? 0 : key.hashCode();
+    }
 
     @Override
     public void put(K key, V value) {
+        if (size >= threshold) {
+            resize();
+        }
+        int hash = hash(key);
+        int index = (hash & 0x7fffffff) % table.length;
+        Node<K, V> current = table[index];
+        while (current != null) {
+            // Porównujemy hash oraz klucze (Objects.equals radzi sobie z null)
+            if (current.hash == hash && Objects.equals(current.key, key)) {
+                current.value = value;
+                return;
+            }
+            current = current.next;
+        }
 
+        Node<K, V> newNode = new Node<>(hash, key, value, table[index]);
+        table[index] = newNode;
+        size++;
     }
 
     @Override
     public V getValue(K key) {
+        int hash = hash(key);
+        int index = (hash & 0x7fffffff) % table.length;
+        Node<K, V> current = table[index];
+        while (current != null) {
+            if (current.hash == hash && Objects.equals(current.key, key)) {
+                return current.value;
+            }
+            current = current.next;
+        }
         return null;
     }
-
     @Override
     public int getSize() {
-        return 0;
+        return size;
+    }
+
+    private void resize() {
+        int newCapacity = table.length * 2;
+        Node<K, V>[] newTable = new Node[newCapacity];
+        for (Node<K, V> node : table) {
+            while (node != null) {
+                Node<K, V> next = node.next;
+                int index = (node.hash & 0x7fffffff) % newCapacity;
+                node.next = newTable[index];
+                newTable[index] = node;
+                node = next;
+            }
+        }
+        table = newTable;
+        threshold = (int) (newCapacity * DEFAULT_LOAD_FACTOR);
     }
 }
+
+
+

From 607cd32a3bed1cc93a29fb51e5845183c6f0d4d1 Mon Sep 17 00:00:00 2001
From: Brynkiewicz <michal.brynkiewicz@envistaco.com>
Date: Wed, 8 Apr 2026 22:42:02 +0200
Subject: [PATCH 2/6] checkstyle fixes

---
 src/main/java/core/basesyntax/MyHashMap.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main/java/core/basesyntax/MyHashMap.java b/src/main/java/core/basesyntax/MyHashMap.java
index ddf13d9d1..17022f112 100644
--- a/src/main/java/core/basesyntax/MyHashMap.java
+++ b/src/main/java/core/basesyntax/MyHashMap.java
@@ -6,11 +6,13 @@
 public class MyHashMap<K, V> implements MyMap<K, V> {
     private static final int DEFAULT_INITIAL_CAPACITY = 16;
     private static final float DEFAULT_LOAD_FACTOR = 0.75f;
+
     static class Node<K, V> implements Map.Entry<K, V> {
         private final int hash;
         private final K key;
         private V value;
         private Node<K, V> next;
+
         Node(int hash, K key, V value, Node<K, V> next) {
             this.hash = hash;
             this.key = key;
@@ -39,6 +41,7 @@ public V setValue(V value) {
     private Node<K, V>[] table;
     private int size;
     private int threshold;
+
     public MyHashMap() {
         table = new Node[DEFAULT_INITIAL_CAPACITY];
         threshold = (int) (DEFAULT_INITIAL_CAPACITY * DEFAULT_LOAD_FACTOR);
@@ -83,6 +86,7 @@ public V getValue(K key) {
         }
         return null;
     }
+
     @Override
     public int getSize() {
         return size;

From f03378a11278af39a7b5a6a0ce62e13ca13979da Mon Sep 17 00:00:00 2001
From: Brynkiewicz <michal.brynkiewicz@envistaco.com>
Date: Wed, 8 Apr 2026 23:00:55 +0200
Subject: [PATCH 3/6] after fixes

---
 src/main/java/core/basesyntax/MyHashMap.java | 28 ++++----------------
 1 file changed, 5 insertions(+), 23 deletions(-)

diff --git a/src/main/java/core/basesyntax/MyHashMap.java b/src/main/java/core/basesyntax/MyHashMap.java
index 17022f112..ba42e4530 100644
--- a/src/main/java/core/basesyntax/MyHashMap.java
+++ b/src/main/java/core/basesyntax/MyHashMap.java
@@ -7,35 +7,18 @@ public class MyHashMap<K, V> implements MyMap<K, V> {
     private static final int DEFAULT_INITIAL_CAPACITY = 16;
     private static final float DEFAULT_LOAD_FACTOR = 0.75f;
 
-    static class Node<K, V> implements Map.Entry<K, V> {
+    private class Node<K, V> {
         private final int hash;
         private final K key;
         private V value;
         private Node<K, V> next;
 
-        Node(int hash, K key, V value, Node<K, V> next) {
+        public Node(int hash, K key, V value, Node<K, V> next) {
             this.hash = hash;
             this.key = key;
             this.value = value;
             this.next = next;
         }
-
-        @Override
-        public K getKey() {
-            return key;
-        }
-
-        @Override
-        public V getValue() {
-            return value;
-        }
-
-        @Override
-        public V setValue(V value) {
-            V oldValue = this.value;
-            this.value = value;
-            return oldValue;
-        }
     }
 
     private Node<K, V>[] table;
@@ -57,10 +40,9 @@ public void put(K key, V value) {
             resize();
         }
         int hash = hash(key);
-        int index = (hash & 0x7fffffff) % table.length;
+        int index = (hash & Integer.MAX_VALUE) % table.length;
         Node<K, V> current = table[index];
         while (current != null) {
-            // Porównujemy hash oraz klucze (Objects.equals radzi sobie z null)
             if (current.hash == hash && Objects.equals(current.key, key)) {
                 current.value = value;
                 return;
@@ -76,7 +58,7 @@ public void put(K key, V value) {
     @Override
     public V getValue(K key) {
         int hash = hash(key);
-        int index = (hash & 0x7fffffff) % table.length;
+        int index = (hash & Integer.MAX_VALUE) % table.length;
         Node<K, V> current = table[index];
         while (current != null) {
             if (current.hash == hash && Objects.equals(current.key, key)) {
@@ -98,7 +80,7 @@ private void resize() {
         for (Node<K, V> node : table) {
             while (node != null) {
                 Node<K, V> next = node.next;
-                int index = (node.hash & 0x7fffffff) % newCapacity;
+                int index = (node.hash & Integer.MAX_VALUE) % newCapacity;
                 node.next = newTable[index];
                 newTable[index] = node;
                 node = next;

From f43dfe4a0113fa6ede07d0eff9f0b0437a608f99 Mon Sep 17 00:00:00 2001
From: Brynkiewicz <michal.brynkiewicz@envistaco.com>
Date: Wed, 8 Apr 2026 23:02:02 +0200
Subject: [PATCH 4/6] after fixes2

---
 src/main/java/core/basesyntax/MyHashMap.java | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/main/java/core/basesyntax/MyHashMap.java b/src/main/java/core/basesyntax/MyHashMap.java
index ba42e4530..aa1a486e8 100644
--- a/src/main/java/core/basesyntax/MyHashMap.java
+++ b/src/main/java/core/basesyntax/MyHashMap.java
@@ -1,6 +1,5 @@
 package core.basesyntax;
 
-import java.util.Map;
 import java.util.Objects;
 
 public class MyHashMap<K, V> implements MyMap<K, V> {

From 5e508f82bf79bb2b58f2ddcb621ad344ec8f1df4 Mon Sep 17 00:00:00 2001
From: Brynkiewicz <michal.brynkiewicz@envistaco.com>
Date: Wed, 8 Apr 2026 23:10:24 +0200
Subject: [PATCH 5/6] after fixes3

---
 src/main/java/core/basesyntax/MyHashMap.java | 50 ++++++++++----------
 1 file changed, 24 insertions(+), 26 deletions(-)

diff --git a/src/main/java/core/basesyntax/MyHashMap.java b/src/main/java/core/basesyntax/MyHashMap.java
index aa1a486e8..e25f18aba 100644
--- a/src/main/java/core/basesyntax/MyHashMap.java
+++ b/src/main/java/core/basesyntax/MyHashMap.java
@@ -5,41 +5,20 @@
 public class MyHashMap<K, V> implements MyMap<K, V> {
     private static final int DEFAULT_INITIAL_CAPACITY = 16;
     private static final float DEFAULT_LOAD_FACTOR = 0.75f;
-
-    private class Node<K, V> {
-        private final int hash;
-        private final K key;
-        private V value;
-        private Node<K, V> next;
-
-        public Node(int hash, K key, V value, Node<K, V> next) {
-            this.hash = hash;
-            this.key = key;
-            this.value = value;
-            this.next = next;
-        }
-    }
-
-    private Node<K, V>[] table;
-    private int size;
-    private int threshold;
+    private static final int HASH_MASK = Integer.MAX_VALUE;
 
     public MyHashMap() {
         table = new Node[DEFAULT_INITIAL_CAPACITY];
         threshold = (int) (DEFAULT_INITIAL_CAPACITY * DEFAULT_LOAD_FACTOR);
     }
 
-    private int hash(K key) {
-        return key == null ? 0 : key.hashCode();
-    }
-
     @Override
     public void put(K key, V value) {
         if (size >= threshold) {
             resize();
         }
         int hash = hash(key);
-        int index = (hash & Integer.MAX_VALUE) % table.length;
+        int index = (hash & HASH_MASK) % table.length;
         Node<K, V> current = table[index];
         while (current != null) {
             if (current.hash == hash && Objects.equals(current.key, key)) {
@@ -57,7 +36,7 @@ public void put(K key, V value) {
     @Override
     public V getValue(K key) {
         int hash = hash(key);
-        int index = (hash & Integer.MAX_VALUE) % table.length;
+        int index = (hash & HASH_MASK) % table.length;
         Node<K, V> current = table[index];
         while (current != null) {
             if (current.hash == hash && Objects.equals(current.key, key)) {
@@ -79,7 +58,7 @@ private void resize() {
         for (Node<K, V> node : table) {
             while (node != null) {
                 Node<K, V> next = node.next;
-                int index = (node.hash & Integer.MAX_VALUE) % newCapacity;
+                int index = (node.hash & HASH_MASK) % newCapacity;
                 node.next = newTable[index];
                 newTable[index] = node;
                 node = next;
@@ -88,7 +67,26 @@ private void resize() {
         table = newTable;
         threshold = (int) (newCapacity * DEFAULT_LOAD_FACTOR);
     }
-}
 
+    private int hash(K key) {
+        return key == null ? 0 : key.hashCode();
+    }
 
+    private class Node<K, V> {
+        private final int hash;
+        private final K key;
+        private V value;
+        private Node<K, V> next;
 
+        public Node(int hash, K key, V value, Node<K, V> next) {
+            this.hash = hash;
+            this.key = key;
+            this.value = value;
+            this.next = next;
+        }
+    }
+
+    private Node<K, V>[] table;
+    private int size;
+    private int threshold;
+}

From e0b7101e6fb55f0bfc6e5da7af70ca665eba1484 Mon Sep 17 00:00:00 2001
From: Michal Brynkiewicz <michalbry@autograf.pl>
Date: Tue, 2 Jun 2026 19:04:27 +0200
Subject: [PATCH 6/6] added missing test components

---
 config/checkstyle.xml                        | 250 +++++++++++++++++++
 pom.xml                                      |   2 +-
 src/main/java/core/basesyntax/MyHashMap.java |  31 ++-
 3 files changed, 278 insertions(+), 5 deletions(-)
 create mode 100644 config/checkstyle.xml

diff --git a/config/checkstyle.xml b/config/checkstyle.xml
new file mode 100644
index 000000000..ea0a5295c
--- /dev/null
+++ b/config/checkstyle.xml
@@ -0,0 +1,250 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC
+        "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+        "https://checkstyle.org/dtds/configuration_1_3.dtd">
+
+<!--
+    Checkstyle configuration that checks the Google coding conventions from Google Java Style
+    that can be found at https://google.github.io/styleguide/javaguide.html.
+
+    Checkstyle is very configurable. Be sure to read the documentation at
+    http://checkstyle.sf.net (or in your downloaded distribution).
+
+    To completely disable a check, just comment it out or delete it from the file.
+
+    Authors: Max Vetrenko, Ruslan Diachenko, Roman Ivanov.
+ -->
+
+<module name="Checker">
+    <property name="charset" value="UTF-8"/>
+
+    <property name="severity" value="error"/>
+
+    <property name="fileExtensions" value="java, properties, xml"/>
+    <!-- Checks for whitespace                               -->
+    <!-- See http://checkstyle.sf.net/config_whitespace.html -->
+    <module name="FileTabCharacter">
+        <property name="eachLine" value="true"/>
+    </module>
+    <module name="NewlineAtEndOfFile">
+        <property name="fileExtensions" value="java, properties, xml"/>
+    </module>
+    <module name="LineLength">
+        <property name="max" value="100"/>
+        <property name="ignorePattern" value="^package.*|^import.*|a href|href|http://|https://|ftp://"/>
+    </module>
+    <module name="TreeWalker">
+        <module name="OuterTypeFilename"/>
+        <module name="IllegalTokenText">
+            <property name="tokens" value="STRING_LITERAL, CHAR_LITERAL"/>
+            <property name="format"
+                      value="\\u00(09|0(a|A)|0(c|C)|0(d|D)|22|27|5(C|c))|\\(0(10|11|12|14|15|42|47)|134)"/>
+            <property name="message"
+                      value="Consider using special escape sequence instead of octal value or Unicode escaped value."/>
+        </module>
+        <module name="AvoidEscapedUnicodeCharacters">
+            <property name="allowEscapesForControlCharacters" value="true"/>
+            <property name="allowByTailComment" value="true"/>
+            <property name="allowNonPrintableEscapes" value="true"/>
+        </module>
+        <module name="AvoidStarImport"/>
+        <module name="IllegalImport"/>
+        <module name="RedundantImport"/>
+        <module name="UnusedImports"/>
+        <module name="OneTopLevelClass"/>
+        <module name="NoLineWrap"/>
+        <module name="EmptyBlock">
+            <property name="option" value="TEXT"/>
+            <property name="tokens"
+                      value="LITERAL_TRY, LITERAL_FINALLY, LITERAL_IF, LITERAL_ELSE, LITERAL_SWITCH"/>
+        </module>
+        <module name="NeedBraces"/>
+        <module name="LeftCurly"/>
+        <module name="RightCurly">
+            <property name="id" value="RightCurlySame"/>
+            <property name="tokens"
+                      value="LITERAL_TRY, LITERAL_CATCH, LITERAL_FINALLY, LITERAL_IF, LITERAL_ELSE,
+                    LITERAL_DO"/>
+        </module>
+        <module name="RightCurly">
+            <property name="id" value="RightCurlyAlone"/>
+            <property name="option" value="alone"/>
+            <property name="tokens"
+                      value="CLASS_DEF, METHOD_DEF, CTOR_DEF, LITERAL_FOR, LITERAL_WHILE, STATIC_INIT,
+                    INSTANCE_INIT"/>
+        </module>
+        <module name="WhitespaceAround">
+            <property name="allowEmptyConstructors" value="true"/>
+            <property name="allowEmptyLambdas" value="true"/>
+            <property name="allowEmptyMethods" value="true"/>
+            <property name="allowEmptyTypes" value="true"/>
+            <property name="allowEmptyLoops" value="true"/>
+            <message key="ws.notFollowed"
+                     value="WhitespaceAround: ''{0}'' is not followed by whitespace. Empty blocks may only be represented as '{}' when not part of a multi-block statement (4.1.3)"/>
+            <message key="ws.notPreceded"
+                     value="WhitespaceAround: ''{0}'' is not preceded with whitespace."/>
+        </module>
+        <module name="OneStatementPerLine"/>
+        <module name="MultipleVariableDeclarations"/>
+        <module name="ArrayTypeStyle"/>
+        <module name="MissingSwitchDefault"/>
+        <module name="FallThrough"/>
+        <module name="VisibilityModifier">
+            <property name="protectedAllowed" value="true"/>
+        </module>
+        <module name="UpperEll"/>
+        <module name="ModifierOrder"/>
+        <module name="EmptyLineSeparator">
+            <property name="allowNoEmptyLineBetweenFields" value="true"/>
+            <property name="allowMultipleEmptyLines" value="false"/>
+            <property name="allowMultipleEmptyLinesInsideClassMembers" value="false"/>
+        </module>
+        <module name="SeparatorWrap">
+            <property name="id" value="SeparatorWrapDot"/>
+            <property name="tokens" value="DOT"/>
+            <property name="option" value="nl"/>
+        </module>
+        <module name="SeparatorWrap">
+            <property name="id" value="SeparatorWrapComma"/>
+            <property name="tokens" value="COMMA"/>
+            <property name="option" value="EOL"/>
+        </module>
+        <module name="SeparatorWrap">
+            <!-- ELLIPSIS is EOL until https://github.com/google/styleguide/issues/258 -->
+            <property name="id" value="SeparatorWrapEllipsis"/>
+            <property name="tokens" value="ELLIPSIS"/>
+            <property name="option" value="EOL"/>
+        </module>
+        <module name="SeparatorWrap">
+            <!-- ARRAY_DECLARATOR is EOL until https://github.com/google/styleguide/issues/259 -->
+            <property name="id" value="SeparatorWrapArrayDeclarator"/>
+            <property name="tokens" value="ARRAY_DECLARATOR"/>
+            <property name="option" value="EOL"/>
+        </module>
+        <module name="SeparatorWrap">
+            <property name="id" value="SeparatorWrapMethodRef"/>
+            <property name="tokens" value="METHOD_REF"/>
+            <property name="option" value="nl"/>
+        </module>
+        <module name="PackageName">
+            <property name="format" value="^[a-z]+(\.[a-z][a-z0-9]*)*$"/>
+            <message key="name.invalidPattern"
+                     value="Package name ''{0}'' must match pattern ''{1}''."/>
+        </module>
+        <module name="TypeName">
+            <message key="name.invalidPattern"
+                     value="Type name ''{0}'' must match pattern ''{1}''."/>
+        </module>
+        <module name="MemberName">
+            <property name="format" value="^[a-z][a-z0-9][a-zA-Z0-9]*$"/>
+            <message key="name.invalidPattern"
+                     value="Member name ''{0}'' must match pattern ''{1}''."/>
+        </module>
+        <module name="ParameterName">
+            <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+            <message key="name.invalidPattern"
+                     value="Parameter name ''{0}'' must match pattern ''{1}''."/>
+        </module>
+        <module name="LambdaParameterName">
+            <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+            <message key="name.invalidPattern"
+                     value="Lambda parameter name ''{0}'' must match pattern ''{1}''."/>
+        </module>
+        <module name="CatchParameterName">
+            <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+            <message key="name.invalidPattern"
+                     value="Catch parameter name ''{0}'' must match pattern ''{1}''."/>
+        </module>
+        <module name="LocalVariableName">
+            <property name="tokens" value="VARIABLE_DEF"/>
+            <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+            <message key="name.invalidPattern"
+                     value="Local variable name ''{0}'' must match pattern ''{1}''."/>
+        </module>
+        <module name="ClassTypeParameterName">
+            <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+            <message key="name.invalidPattern"
+                     value="Class type name ''{0}'' must match pattern ''{1}''."/>
+        </module>
+        <module name="MethodTypeParameterName">
+            <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+            <message key="name.invalidPattern"
+                     value="Method type name ''{0}'' must match pattern ''{1}''."/>
+        </module>
+        <module name="InterfaceTypeParameterName">
+            <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+            <message key="name.invalidPattern"
+                     value="Interface type name ''{0}'' must match pattern ''{1}''."/>
+        </module>
+        <module name="NoFinalizer"/>
+        <module name="GenericWhitespace">
+            <message key="ws.followed"
+                     value="GenericWhitespace ''{0}'' is followed by whitespace."/>
+            <message key="ws.preceded"
+                     value="GenericWhitespace ''{0}'' is preceded with whitespace."/>
+            <message key="ws.illegalFollow"
+                     value="GenericWhitespace ''{0}'' should followed by whitespace."/>
+            <message key="ws.notPreceded"
+                     value="GenericWhitespace ''{0}'' is not preceded with whitespace."/>
+        </module>
+        <module name="Indentation">
+            <property name="basicOffset" value="4"/>
+            <property name="braceAdjustment" value="0"/>
+            <property name="caseIndent" value="4"/>
+            <property name="throwsIndent" value="8"/>
+            <property name="lineWrappingIndentation" value="8"/>
+            <property name="arrayInitIndent" value="4"/>
+        </module>
+        <module name="AbbreviationAsWordInName">
+            <property name="ignoreFinal" value="false"/>
+            <property name="allowedAbbreviationLength" value="1"/>
+        </module>
+        <module name="OverloadMethodsDeclarationOrder"/>
+        <module name="VariableDeclarationUsageDistance"/>
+        <module name="CustomImportOrder">
+            <property name="sortImportsInGroupAlphabetically" value="true"/>
+            <property name="separateLineBetweenGroups" value="true"/>
+            <property name="customImportOrderRules" value="STATIC###THIRD_PARTY_PACKAGE"/>
+        </module>
+        <module name="MethodParamPad"/>
+        <module name="NoWhitespaceBefore">
+            <property name="tokens"
+                      value="COMMA, SEMI, POST_INC, POST_DEC, DOT, ELLIPSIS, METHOD_REF"/>
+            <property name="allowLineBreaks" value="true"/>
+        </module>
+        <module name="ParenPad"/>
+        <module name="OperatorWrap">
+            <property name="option" value="NL"/>
+            <property name="tokens"
+                      value="BAND, BOR, BSR, BXOR, DIV, EQUAL, GE, GT, LAND, LE, LITERAL_INSTANCEOF, LOR,
+                    LT, MINUS, MOD, NOT_EQUAL, PLUS, QUESTION, SL, SR, STAR, METHOD_REF "/>
+        </module>
+        <module name="AnnotationLocation">
+            <property name="id" value="AnnotationLocationMostCases"/>
+            <property name="tokens"
+                      value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, METHOD_DEF, CTOR_DEF"/>
+        </module>
+        <module name="AnnotationLocation">
+            <property name="id" value="AnnotationLocationVariables"/>
+            <property name="tokens" value="VARIABLE_DEF"/>
+            <property name="allowSamelineMultipleAnnotations" value="true"/>
+        </module>
+        <module name="NonEmptyAtclauseDescription"/>
+        <module name="MethodName">
+            <property name="format" value="^[a-z][a-z0-9][a-zA-Z0-9_]*$"/>
+            <message key="name.invalidPattern"
+                     value="Method name ''{0}'' must match pattern ''{1}''."/>
+        </module>
+        <module name="SingleLineJavadoc">
+            <property name="ignoreInlineTags" value="false"/>
+        </module>
+        <module name="EmptyCatchBlock">
+            <property name="exceptionVariableName" value="expected"/>
+        </module>
+        <module name="CommentsIndentation"/>
+        <module name="DeclarationOrder"/>
+        <module name="SingleSpaceSeparator">
+            <property name="validateComments" value="true"/>
+        </module>
+    </module>
+</module>
diff --git a/pom.xml b/pom.xml
index ae43693ff..bd8385ffa 100644
--- a/pom.xml
+++ b/pom.xml
@@ -40,7 +40,7 @@
                     </execution>
                 </executions>
                 <configuration>
-                    <configLocation>${maven.checkstyle.plugin.configLocation}</configLocation>
+                    <configLocation>config/checkstyle.xml</configLocation>
                     <consoleOutput>true</consoleOutput>
                     <failsOnError>true</failsOnError>
                     <linkXRef>false</linkXRef>
diff --git a/src/main/java/core/basesyntax/MyHashMap.java b/src/main/java/core/basesyntax/MyHashMap.java
index e25f18aba..0563a86de 100644
--- a/src/main/java/core/basesyntax/MyHashMap.java
+++ b/src/main/java/core/basesyntax/MyHashMap.java
@@ -1,5 +1,6 @@
 package core.basesyntax;
 
+import java.util.Arrays;
 import java.util.Objects;
 
 public class MyHashMap<K, V> implements MyMap<K, V> {
@@ -7,11 +8,37 @@ public class MyHashMap<K, V> implements MyMap<K, V> {
     private static final float DEFAULT_LOAD_FACTOR = 0.75f;
     private static final int HASH_MASK = Integer.MAX_VALUE;
 
+    private Node<K, V>[] table;
+    private int size;
+    private int threshold;
+
     public MyHashMap() {
         table = new Node[DEFAULT_INITIAL_CAPACITY];
         threshold = (int) (DEFAULT_INITIAL_CAPACITY * DEFAULT_LOAD_FACTOR);
     }
 
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+
+        if (!(o instanceof MyHashMap<?, ?> myHashMap)) {
+            return false;
+        }
+
+        return getSize() == myHashMap.getSize()
+                && threshold == myHashMap.threshold
+                && Arrays.equals(table, myHashMap.table);
+    }
+
+    @Override
+    public int hashCode() {
+        int result = Objects.hash(getSize(), threshold);
+        result = 31 * result + Arrays.hashCode(table);
+        return result;
+    }
+
     @Override
     public void put(K key, V value) {
         if (size >= threshold) {
@@ -85,8 +112,4 @@ public Node(int hash, K key, V value, Node<K, V> next) {
             this.next = next;
         }
     }
-
-    private Node<K, V>[] table;
-    private int size;
-    private int threshold;
 }