### Java
```java
MockResponse response = new MockResponse.Builder()
    .addHeader("Content-Type", "application/json; charset=utf-8")
    .addHeader("Cache-Control", "no-cache")
    .body("{}")
    .build();
```

### Kotlin
```kotlin
val response = MockResponse.Builder()
  .addHeader("Content-Type", "application/json; charset=utf-8")
  .addHeader("Cache-Control", "no-cache")
  .body("{}")
  .build()
```

          val staticEntry = STATIC_HEADER_TABLE[index]
          addHeader(staticEntry)
        } else {
          val dynamicTableIndex = dynamicTableIndex(index - STATIC_HEADER_TABLE.size)
          if (dynamicTableIndex < 0 || dynamicTableIndex >= dynamicTable.size) {
            throw IOException("Header index too large ${index + 1}")
          }
          addHeader(dynamicTable[dynamicTableIndex]!!)
        }
      }

     * by a colon and a value.
     */
    public fun addHeader(header: String): Builder =
      apply {
        headers_.add(header)
      }

    /**
     * Adds a new header with the name and value. This may be used to add multiple headers with the
     * same name.
     */
    public fun addHeader(
      name: String,
      value: Any,
    ): Builder =
      apply {

    val request =
      Request
        .Builder()
        .url("https://api.github.com/repos/square/okhttp/issues")
        .header("User-Agent", "OkHttp Headers.java")
        .addHeader("Accept", "application/json; q=0.5")
        .addHeader("Accept", "application/vnd.github.v3+json")
        .build()

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

      execute(differentDnsUrl)
    }
  }

  @Test
  fun skipsOnRedirectWhenDnsDontMatch() {
    server.enqueue(
      MockResponse
        .Builder()
        .code(301)
        .addHeader("Location", url.newBuilder().host("differentdns.com").build())
        .build(),
    )
    server.enqueue(
      MockResponse
        .Builder()
        .body("unexpected call")
        .build(),
    )

            context.style = new AttributedStyle();
            context.addInHeader(
                    context.style.italic().bold().foreground(Colors.rgbColor("green")),
                    "Maven Encryption " + CLIReportingUtils.showVersionMinimal());
            context.addInHeader("Tool for secure password management on workstations.");
            context.addInHeader("This tool is part of Apache Maven 4 distribution.");

            context.style = new AttributedStyle();
            context.addInHeader(
                    context.style.italic().bold().foreground(Colors.rgbColor("green")),
                    "Maven Upgrade " + CLIReportingUtils.showVersionMinimal());
            context.addInHeader("Tool for upgrading Maven projects and dependencies.");
            context.addInHeader("This tool is part of Apache Maven 4 distribution.");

    enableTlsWithTunnel()
    server.enqueue(
      MockResponse
        .Builder()
        .inTunnel()
        .code(407)
        .addHeader("Proxy-Authenticate: Basic realm=\"localhost\"")
        .addHeader("Connection: close")
        .build(),
    )
    server.enqueue(
      MockResponse
        .Builder()
        .inTunnel()
        .build(),
    )

        }

        roleQueryHelperImpl.headerKey = "fess1";

        getMockRequest().addHeader("aaa", "bbb");
        roleSet = buildByHeader(roleQueryHelperImpl, getMockRequest());
        assertEquals(0, roleSet.size());

        roleQueryHelperImpl.encryptedHeaderValue = false;
        getMockRequest().addHeader("fess1", System.currentTimeMillis() / 1000 + "\nrole1,role2,role3");

                    httpResponse.addHeader(ACCESS_CONTROL_ALLOW_ORIGIN, origin);
                    httpResponse.addHeader(ACCESS_CONTROL_ALLOW_METHODS, "GET, POST, OPTIONS");
                    httpResponse.addHeader(ACCESS_CONTROL_ALLOW_HEADERS, "Content-Type");
                    httpResponse.addHeader(ACCESS_CONTROL_MAX_AGE, "3600");
                    httpResponse.addHeader(ACCESS_CONTROL_ALLOW_CREDENTIALS, "true");