impl storage class

src/main/java/core/basesyntax/impl/Pair.java

@@ -0,0 +1,23 @@
+package core.basesyntax.impl;
+
+public class Pair<K, V> {
+    private K key;
+    private V value;
+
+    public Pair(K key, V value) {
+        this.key = key;
+        this.value = value;
+    }
+
+    public K getKey() {
+        return key;
+    }
+
+    public V getValue() {
+        return value;
+    }
+
+    public void setValue(V value) {
+        this.value = value;
+    }
+}

src/main/java/core/basesyntax/impl/StorageImpl.java

@@ -3,17 +3,55 @@
 import core.basesyntax.Storage;
 
 public class StorageImpl<K, V> implements Storage<K, V> {
+    private static final int MAX_SIZE = 10;
+    private Pair[] storage;
+    private int size;
+
+    public StorageImpl() {
+        this.size = 0;
+        this.storage = new Pair[MAX_SIZE];
+    }
+
+    private Pair findPair(K key) {
+        for (Pair item : storage) {
+            if (item == null) {
+                continue;
+            }
+
+            if ((key != null && item != null && key.equals(item.getKey())) || item.getKey() == key) {
+                return item;
+            }
+        }
+
+        return null;
+    }
+
     @Override
     public void put(K key, V value) {
+        Pair pair = this.findPair(key);
+
+        if (pair != null) {
+            pair.setValue(value);
+            return;
+        }
+
+        this.storage[size] = new Pair(key, value);
+        this.size++;
     }
 
     @Override
     public V get(K key) {
-        return null;
+        Pair pair = this.findPair(key);
+
+        if (pair == null) {
+            return null;
+        }
+
+        return (V) pair.getValue();
     }
 
     @Override
     public int size() {
-        return -1;
+        return this.size;
     }
 }