=== ":material-language-java: Java"
    ```java
      public static final MediaType MEDIA_TYPE_MARKDOWN
          = MediaType.parse("text/x-markdown; charset=utf-8");

      private final OkHttpClient client = new OkHttpClient();

      public void run() throws Exception {
        RequestBody requestBody = new RequestBody() {
          @Override public MediaType contentType() {
            return MEDIA_TYPE_MARKDOWN;
          }

open class ForwardingRequestBody(delegate: RequestBody?) : RequestBody() {
  private val delegate: RequestBody

  fun delegate(): RequestBody {
    return delegate
  }

  override fun contentType(): MediaType? {
    return delegate.contentType()
  }

  @Throws(IOException::class)
  override fun contentLength(): Long {
    return delegate.contentLength()
  }

  @Throws(IOException::class)

| HttpUrl.uri()                       | HttpUrl.toUri()                 |
| HttpUrl.url()                       | HttpUrl.toUrl()                 |
| MediaType.get(String)               | String.toMediaType()            |
| MediaType.parse(String)             | String.toMediaTypeOrNull()      |
| RequestBody.create(ByteArray)       | ByteArray.toRequestBody()       |

 * limitations under the License.
 */
package okhttp3.recipes.kt

import java.io.File
import java.io.IOException
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.RequestBody.Companion.asRequestBody

class PostFile {
  private val client = OkHttpClient()

  fun run() {

	public final fun url (Lokhttp3/HttpUrl;)Lokhttp3/dnsoverhttps/DnsOverHttps$Builder;
}

public final class okhttp3/dnsoverhttps/DnsOverHttps$Companion {
	public final fun getDNS_MESSAGE ()Lokhttp3/MediaType;

 * limitations under the License.
 */
package okhttp3.recipes.kt

import java.io.IOException
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.RequestBody
import okio.BufferedSink

class PostStreaming {
  private val client = OkHttpClient()

  fun run() {

      Interceptor { chain: Interceptor.Chain ->
        val originalRequest = chain.request()
        val mediaType = "text/plain".toMediaType()
        val body = "abc".toRequestBody(mediaType)
        chain.proceed(
          originalRequest.newBuilder()
            .method("POST", body)
            .header("Content-Type", mediaType.toString())
            .header("Content-Length", body.contentLength().toString())
            .build(),

 * limitations under the License.
 */
package okhttp3.recipes.kt

import java.io.IOException
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.RequestBody.Companion.toRequestBody

class PostString {
  private val client = OkHttpClient()

  fun run() {

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.recipes.kt

import java.io.IOException
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.RequestBody.Companion.asRequestBody
import okio.Path.Companion.toPath
import okio.buffer
import okio.fakefilesystem.FakeFileSystem

  fun noAttemptToReadResponseIfLoadingRequestBodyIsSourceOfFailure() {
    server.enqueue(MockResponse(body = "abc"))

    val requestBody =
      object : RequestBody() {
        override fun contentType(): MediaType? = null

        override fun writeTo(sink: BufferedSink) {
          throw IOException("boom") // Despite this exception, 'sink' is healthy.
        }
      }

    val callA =
      client.newCall(