# Java Code Samples

Use the Java code samples below to quickly get started developing with the Rev AI APIs.

## Submit a local file for transcription

This example uses the [Rev AI Java SDK](/sdk/java).

The following example demonstrates how to submit a local audio file for transcription.

To use this example, replace the `<FILEPATH>` placeholder with the path to the file you wish to transcribe and the `<REVAI_ACCESS_TOKEN>` placeholder with your Rev AI account's access token.


```java
String accessToken = "<REVAI_ACCESS_TOKEN>";
String localPathToFile = "<FILEPATH>";

// initialize the client with your access token
ApiClient apiClient = new ApiClient(accessToken);

// submit a local file
RevAiJob revAiJob = apiClient.submitJobLocalFile(localPathToFile);

// check job status
RevAiJob newlyRefreshedRevAiJob = apiClient.getJobDetails(revAiJob.getJobId());

// retrieve transcript
// as plain text
String transcriptText = apiClient.getTranscriptText(revAiJob.getJobId());

// or as an object
RevAiTranscript revAiTranscript = apiClient.getTranscriptObject(revAiJob.getJobId());
```

## Submit a remote file for transcription

This example uses the [Rev AI Java SDK](/sdk/java).

The following example demonstrates how to submit a remote audio file for transcription.

To use this example, replace the `<URL>` placeholder with the public URL to the file you wish to transcribe and the `<REVAI_ACCESS_TOKEN>` placeholder with your Rev AI account's access token.


```java
String accessToken = "<REVAI_ACCESS_TOKEN>";
String urlLinkToFile = "<URL>";

// initialize the client with your access token
ApiClient apiClient = new ApiClient(accessToken);

// submit a remote file
RevAiJobOptions revAiJobOptions = new RevAiJobOptions();
revAiJobOptions.setSourceConfig(urlLinkToFile);
RevAiJob revAiJob = apiClient.submitJobUrl(revAiJobOptions);

// check job status
RevAiJob newlyRefreshedRevAiJob = apiClient.getJobDetails(revAiJob.getJobId());

// retrieve transcript
// as plain text
String transcriptText = apiClient.getTranscriptText(revAiJob.getJobId());

// or as an object
RevAiTranscript revAiTranscript = apiClient.getTranscriptObject(revAiJob.getJobId());
```

## Submit an audio stream for transcription

This example uses the [Rev AI Java SDK](/sdk/java).

The following example demonstrates how to submit an audio stream for transcription.

To use this example, replace the `<FILEPATH>` placeholder with the path to the file you wish to transcribe and the `<REVAI_ACCESS_TOKEN>` placeholder with your Rev AI account's access token.


```java
String accessToken = "<REVAI_ACCESS_TOKEN>";
String filePath = "<FILEPATH>";

// initialize the client with your access token
ApiClient apiClient = new ApiClient(accessToken);

// submit from a stream 
File file = new File(filePath);
FileInputStream fileInputStream;
try {
  fileInputStream = new FileInputStream(file);
} catch (FileNotFoundException e) {
  throw new RuntimeException("Could not find file [" + file.getName() + "]");
}
RevAiJob revAiJob = apiClient.submitJobLocalFile(fileInputStream, String fileName, RevAiJobOptions options);

// check job status
RevAiJob newlyRefreshedRevAiJob = apiClient.getJobDetails(revAiJob.getJobId());

// retrieve transcript
// as plain text
String transcriptText = apiClient.getTranscriptText(revAiJob.getJobId());

// or as an object
RevAiTranscript revAiTranscript = apiClient.getTranscriptObject(revAiJob.getJobId());
```

## Stream a local file

This example uses the [Rev AI Java SDK](/sdk/java).

The following example can be used to configure a streaming client, stream audio from a file, and obtain the transcript as the audio is processed.

To use this example, replace the `<FILEPATH>` placeholder with the path to the file you wish to transcribe and the `<REVAI_ACCESS_TOKEN>` placeholder with your Rev AI account's access token.


```java
import ai.rev.speechtotext.RevAiWebSocketListener;
import ai.rev.speechtotext.SessionConfig;
import ai.rev.speechtotext.models.streaming.StreamContentType;
import ai.rev.speechtotext.models.streaming.SessionConfig;
import ai.rev.speechtotext.models.streaming.ConnectedMessage;
import ai.rev.speechtotext.models.streaming.Hypothesis;
import okhttp3.Response;
import okio.ByteString;

import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Arrays;

public class RevAiStreaming {

  public void streamFromLocalFile() throws InterruptedException {
    String accessToken = "<REVAI_ACCESS_TOKEN>";
    String filePath = "<FILEPATH>";

    // Configure the streaming content type
    StreamContentType streamContentType = new StreamContentType();
    streamContentType.setContentType("audio/x-raw"); // audio content type
    streamContentType.setLayout("interleaved"); // layout
    streamContentType.setFormat("S16LE"); // format
    streamContentType.setRate(16000); // sample rate
    streamContentType.setChannels(1); // channels

    // Setup the SessionConfig with any optional parameters
    SessionConfig sessionConfig = new SessionConfig();
    sessionConfig.setMetaData("Streaming from the Java SDK");
    sessionConfig.setFilterProfanity(true);

    // Initialize your client with your access token
    StreamingClient streamingClient = new StreamingClient(accessToken);

    // Initialize your WebSocket listener
    WebSocketListener webSocketListener = new WebSocketListener();

    // Begin the streaming session
    streamingClient.connect(webSocketListener, streamContentType, sessionConfig);

    // Read file from disk
    File file = new File(filePath);

    // Convert file into byte array
    byte[] fileByteArray = new byte[(int) file.length()];
    try (final FileInputStream fileInputStream = new FileInputStream(file)) {
      BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream);
      try (final DataInputStream dataInputStream = new DataInputStream(bufferedInputStream)) {
        dataInputStream.readFully(fileByteArray, 0, fileByteArray.length);
      } catch (IOException e) {
        throw new RuntimeException(e.getMessage());
      }
    } catch (IOException e) {
      throw new RuntimeException(e.getMessage());
    }

    // Set the number of bytes to send in each message
    int chunk = 8000;

    // Stream the file in the configured chunk size
    for (int start = 0; start < fileByteArray.length; start += chunk) {
      streamingClient.sendAudioData(
          ByteString.of(
              ByteBuffer.wrap(
                  Arrays.copyOfRange(
                      fileByteArray, start, Math.min(fileByteArray.length, start + chunk)))));
    }

    // Wait to make sure all responses are received
    Thread.sleep(5000);

    // Close the WebSocket
    streamingClient.close();
  }

  // Your WebSocket listener for all streaming responses
  private static class WebSocketListener implements RevAiWebSocketListener {

    @Override
    public void onConnected(ConnectedMessage message) {
      System.out.println(message);
    }

    @Override
    public void onHypothesis(Hypothesis hypothesis) {
      System.out.println(hypothesis.toString());
    }

    @Override
    public void onError(Throwable t, Response response) {
      System.out.println(response);
    }

    @Override
    public void onClose(int code, String reason) {
      System.out.println(reason);
    }

    @Override
    public void onOpen(Response response) {
      System.out.println(response.toString());
    }
  }
}
```

Find [more examples of using the Rev AI Java SDK on GitHub](https://github.com/revdotcom/revai-java-sdk/tree/master/examples).