Cleanup: use collectors .toList()

Author: andrei-punko

src/main/java/by/andd3dfx/refactoring/refactored/EventParser.java

@@ -43,6 +43,6 @@ public String parse(Event event) {
     public List<String> parse(List<Event> events) {
         return events.stream()
                 .map(this::parse)
-                .collect(Collectors.toList());
+                .toList();
     }
 }

src/main/java/by/andd3dfx/tree/equivalent/EquivalentTrees.java

@@ -62,7 +62,7 @@ public List<Node> findEquivalentSubtrees(Node root) {
                         entry -> entry.getValue().stream()
                                 .sorted((o1, o2) -> node2Size.get(o2) - node2Size.get(o1))
                                 .limit(2)
-                                .collect(Collectors.toList())
+                                .toList()
                 ));
         // Only absent sets with at least 2 related nodes remain
 

src/test/java/by/andd3dfx/recursion/HanoiTowersTest.java

@@ -36,7 +36,7 @@ private void checkIsFinished(HanoiTowers ht) {
         assertTrue("Left column should be empty", ht.getLeft().getStack().isEmpty());
         assertTrue("Middle column should be empty", ht.getMiddle().getStack().isEmpty());
 
-        List<Integer> disks = ht.getRight().getStack().stream().collect(Collectors.toList());
+        List<Integer> disks = ht.getRight().getStack().stream().toList();
         for (int i = 1; i < disks.size(); i++) {
             assertThat("Disk " + (i - 1) + " should be less than disk " + i,
                     disks.get(i - 1),

src/test/java/by/andd3dfx/tree/BinaryTreeWalkingTest.java

@@ -55,7 +55,7 @@ public void backwardVerticalWalk() {
     }
 
     private void checkResultList(List<BinaryTreeWalking.Node<Integer>> result, int[] expectation) {
-        List<Integer> values = result.stream().map(node -> node.getValue()).collect(Collectors.toList());
+        List<Integer> values = result.stream().map(BinaryTreeWalking.Node::getValue).toList();
         assertThat(values.size(), is(expectation.length));
         assertThat(values.toArray(), is(expectation));
     }