if (!executed) {
        runnables = new RunnableExecutorPair(runnable, executor, runnables);
        return;
      }
    }
    // Execute the runnable immediately. Because of scheduling this may end up getting called before
    // some of the previously added runnables, but we're OK with that. If we want to change the
    // contract to guarantee ordering among runnables we'd have to modify the logic here to allow
    // it.

  val testJavaVersion = System.getProperty("test.java.version", "21").toInt()

  if (project.name != "okhttp") {
    val testRuntimeOnly: Configuration by configurations.getting
    dependencies {
      // https://junit.org/junit5/docs/current/user-guide/#running-tests-build-gradle-bom
      testRuntimeOnly(rootProject.libs.junit.jupiter.engine)

        checkNotNull(entry.getKey());
        checkNotNull(entry.getValue());
      }
      @SuppressWarnings({"unchecked", "rawtypes"})
      // immutable collections are safe for covariant casts
      // and getting the generics right for EnumMap is difficult to impossible
      ImmutableMap<K, V> result = ImmutableEnumMap.asImmutable(new EnumMap(enumMap));
      return result;
    }

    int size = map.size();

            + (throwable == null ? null : Throwables.getStackTraceAsString(throwable)),
        throwableFromOtherThread.get());
  }

  /**
   * Test for a bug where threads weren't getting signaled when shutdown was called, only when tasks
   * completed.
   */
  public void testDirectExecutorService_awaitTermination_missedSignal() {
    ExecutorService service = newDirectExecutorService();

    TestSuite suite = new TestSuite(name);
    for (@SuppressWarnings("rawtypes") // class literals
    Class<? extends AbstractTester> testerClass : testers) {
      @SuppressWarnings("unchecked") // getting rid of the raw type, for better or for worse
      TestSuite testerSuite =
          makeSuiteForTesterClass((Class<? extends AbstractTester<?>>) testerClass);
      if (testerSuite.countTestCases() > 0) {

  /**
   * Views the array as an immutable list. The array must have only {@code E} elements.
   *
   * <p>The array must be internally created.
   */
  @SuppressWarnings("unchecked") // caller is reponsible for getting this right
  static <E> ImmutableList<E> asImmutableList(Object[] elements) {
    return unsafeDelegateList((List) Arrays.asList(elements));
  }

        // With offset 3 and total 5 items, we should get 2 items
        assertEquals(2, result.size());
        assertEquals(1, result.getCurrentPageNumber()); // First page since we're getting actual results
        assertEquals(10, result.getPageSize());
        assertEquals(5, result.getAllRecordCount());
    }

    public void test_selectList_withNullList() {

      .eventListener(eventListener)
      .build()

  @BeforeEach
  fun setUp() {
    server.protocols = bootstrapClient.protocols
    dns = buildLocalhost(bootstrapClient, false)
  }

  @Test
  fun getOne() {
    server.enqueue(
      dnsResponse(
        "0000818000010003000000000567726170680866616365626f6f6b03636f6d0000010001c00c000500010" +

    // Do blocking calls to plan a route for a new connection.
    val connect = planConnect()

    // Now that we have a set of IP addresses, make another attempt at getting a connection from
    // the pool. We have a better chance of matching thanks to connection coalescing.
    val pooled2 = planReusePooledConnection(connect, connect.routes)
    if (pooled2 != null) return pooled2

- **Network & I/O** (`org.codelibs.core.net`, `org.codelibs.core.nio`) - URL utilities, UUID generation, MIME type detection, and NIO channel operations

## 🚀 Getting Started

### Requirements
- **Java 21 or higher** (Required for modern language features)
- **Maven 3.6+** or **Gradle 7+** for build management
- **Optional**: SLF4J or Commons Logging for logging support