import CodeBlock from '@theme/CodeBlock';
import java_examples from "!!raw-loader!../../../../../bindings/java/examples/java-app/src/main/java/org/iota/client/example/ExampleApp.java";
const javaFunctionName = "public static void getDataMessage",
  indexStart = java_examples.indexOf(javaFunctionName);
const nextJavaFunctionName = "public static void transaction",
  indexEnd = java_examples.indexOf(nextJavaFunctionName);
const data_message = java_examples.substring(indexStart, indexEnd);

You can use the
[ClientMessageBuilder.withDataString(data: String)](./../libraries/java/api_reference#withdatastringdata-clientmessagebuilder) function
function to attach data to a message.

<CodeBlock className="language-javascript">
    {data_message}
</CodeBlock>

**Output example**:

```json
{
   "message": {
      "networkId":"14379272398717627559",
      "parentMessageIds": [
         "1a383abbe5f6a6b0899d718975c3119643aa784a68d04075f4e986fd7a0c0e4b",
         "6098f889e31911833df7b7839e8b222d701ab496f7dfa1a719087edf4fa7ae52",
         "a98b47db4e8254eccc738c968bd35b08a5491e56d6c1a18af298c42bbd8c3a46",
         "da6796c0842c08de832c7948fffedc0d5adce372e50a108f26a128dba6096d31"
      ],
      "payload": {
         "type":2,
         "index":"494f54412e52532042494e44494e47202d204e4f44452e4a53",
         "data":"736f6d65207574662062617365642064617461"
      },
      "nonce":"13835058055282176519"
   },
   "messageId":"10f59c101cec669b0a0ba163bc777184c7f63455f5e771d42f910a1ba2ad20ff"
}
```