import okhttp3.Response

class AsynchronousGet {
  private val client = OkHttpClient()

  fun run() {
    val request =
      Request
        .Builder()
        .url("http://publicobject.com/helloworld.txt")
        .build()

    client.newCall(request).enqueue(
      object : Callback {
        override fun onFailure(
          call: Call,
          e: IOException,
        ) {

import okhttp3.Request

class SynchronousGet {
  private val client = OkHttpClient()

  fun run() {
    val request =
      Request
        .Builder()
        .url("https://publicobject.com/helloworld.txt")
        .build()

    client.newCall(request).execute().use { response ->
      if (!response.isSuccessful) throw IOException("Unexpected code $response")

      for ((name, value) in response.headers) {

 * directive:
 *
 * ```java
 * Request request = new Request.Builder()
 *     .cacheControl(new CacheControl.Builder().noCache().build())
 *     .url("http://publicobject.com/helloworld.txt")
 *     .build();
 * ```
 *
 * If it is only necessary to force a cached response to be validated by the server, use the more
 * efficient `max-age=0` directive instead:
 *
 * ```java

=== ":material-language-kotlin: Kotlin"
    ```kotlin
      private val client = OkHttpClient()

      fun run() {
        val request = Request.Builder()
            .url("https://publicobject.com/helloworld.txt")
            .build()

        client.newCall(request).execute().use { response ->
          if (!response.isSuccessful) throw IOException("Unexpected code $response")

        .sslSocketFactory(certificates.sslSocketFactory(), certificates.trustManager)
        .build()
  }

  fun run() {
    showUrl("https://squareup.com/robots.txt")
    showUrl("https://publicobject.com/helloworld.txt")
  }

  private fun showUrl(url: String) {
    val request = Builder().url(url).build()
    client
      .newCall(request)
      .execute()
      .use { response ->

          // 1 MiB.
          maxSize = 10L * 1024L * 1024L,
        ),
      ).build()

  fun run() {
    val request =
      Request
        .Builder()
        .url("http://publicobject.com/helloworld.txt")
        .build()

    val response1Body =
      client.newCall(request).execute().use {
        if (!it.isSuccessful) throw IOException("Unexpected code $it")

    }

    @Test
    void testToString() {
        // Test toString with zterm = true
        String originalStringTrue = "HelloWorld";
        UnicodeString unicodeStringTrue = new UnicodeString(originalStringTrue, true);
        assertEquals(originalStringTrue, unicodeStringTrue.toString(), "toString should return original string with zterm");

		})
	}
}

func TestValidRegion(t *testing.T) {
	tests := []struct {
		name    string
		success bool
	}{
		{name: "us-east-1", success: true},
		{name: "us_east", success: true},
		{name: "helloWorld", success: true},
		{name: "-fdslka", success: false},
		{name: "^00[", success: false},
		{name: "my region", success: false},
		{name: "%%$#!", success: false},
	}

	for _, test := range tests {

    }

    @Test
    @DisplayName("Should join with empty string delimiter")
    void testJoinWithEmptyDelimiter() {
        String result = StringUtil.join("", "hello", "world");
        assertEquals("helloworld", result);
    }

    @Test
    @DisplayName("Should join with multi-character delimiter")
    void testJoinWithMultiCharDelimiter() {
        String result = StringUtil.join(" - ", "apple", "banana", "cherry");