refactor : changed the combiner

app/src/main/java/ru/project/collectors/MyCollectors.java

@@ -0,0 +1,15 @@
+package ru.project.collectors;
+import java.util.stream.Collector;
+
+public class MyCollectors
+{
+    private MyCollectors() {
+
+    }
+
+    public static <T> Collector<T, MyList<T>, MyList<T>> toMyList()
+    {
+        return new MyListCollector<>();
+
+    }
+}

app/src/main/java/ru/project/collectors/MyListCollector.java

@@ -0,0 +1,43 @@
+package ru.project.collectors;
+import java.util.Collections;
+import java.util.Set;
+import java.util.function.BiConsumer;
+import java.util.function.BinaryOperator;
+import java.util.function.Function;
+import java.util.function.Supplier;
+import java.util.stream.Collector;
+public class MyListCollector <T> implements Collector<T, MyList<T>, MyList<T>>
+{
+    @Override
+    public Supplier<MyList<T>> supplier()
+    {
+        return () -> new MyLinkedList<>();
+    }
+
+    @Override
+    public BiConsumer<MyList<T>, T> accumulator() {
+
+        return (list, element) -> list.add(element);
+    }
+
+    @Override
+    public BinaryOperator<MyList<T>> combiner() {
+        return (list1, list2) -> {
+            list1.addAll(list2);
+            return list1;
+        };
+    }
+
+    @Override
+    public Function<MyList<T>, MyList<T>> finisher()
+    {
+        return list -> list;
+    }
+
+    @Override
+    public Set<Collector.Characteristics> characteristics() {
+        return java.util.Set.of(
+                Collector.Characteristics.IDENTITY_FINISH
+        );
+    }
+}