solution

src/main/java/core/basesyntax/BlockingQueue.java

@@ -4,24 +4,33 @@
 import java.util.Queue;
 
 public class BlockingQueue<T> {
-    private Queue<T> queue = new LinkedList<>();
-    private int capacity;
+    private final Queue<T> queue = new LinkedList<>();
+    private final int capacity;
 
     public BlockingQueue(int capacity) {
         this.capacity = capacity;
     }
 
-    public synchronized void put(T element) throws InterruptedException {
-        // write your code here
+    public synchronized void put(T value) throws InterruptedException {
+        while (queue.size() == capacity) {
+            wait();
+        }
+
+        queue.offer(value);
+        notifyAll();
     }
 
     public synchronized T take() throws InterruptedException {
-        // write your code here
-        return null;
+        while (queue.isEmpty()) {
+            wait();
+        }
+
+        T value = queue.poll();
+        notifyAll();
+        return value;
     }
 
     public synchronized boolean isEmpty() {
-        // write your code here
-        return true;
+        return queue.isEmpty();
     }
 }

src/main/java/core/basesyntax/thread/Consumer.java

@@ -3,15 +3,15 @@
 import core.basesyntax.BlockingQueue;
 
 public class Consumer implements Runnable {
-    private BlockingQueue<Integer> blockingQueue;
+    private final BlockingQueue<Integer> blockingQueue;
 
     public Consumer(BlockingQueue<Integer> blockingQueue) {
         this.blockingQueue = blockingQueue;
     }
 
     @Override
     public void run() {
-        while (!blockingQueue.isEmpty()) {
+        while (true) {
             try {
                 System.out.println("Took value " + blockingQueue.take());
             } catch (InterruptedException e) {