public class KafkaProducer <K,V> implements Producer <K,V> {
    public KafkaProducer (Properties properties) { ... }

    public Future <RecordMetadata> send (ProducerRecord <K,V> record) { ... }
    public Future <RecordMetadata> send (ProducerRecord <K,V> record, Callback callback) { ... }

    public void flush () { ... }
    public void close () { ... }

    public void initTransactions () { ... }
    public void beginTransaction () { ... }
    public void abortTransaction () { ... }
    public void commitTransaction () { ... }

    // Introspection.
    public List <PartitionInfo> partitionsFor (String topic) { ... }

    ...
}

public class ProducerRecord <K,V> {
    public ProducerRecord (String topic, V value) { ... }
    public ProducerRecord (String topic, K key, V value) { ... }
    public ProducerRecord (
        String topic, Integer partition, K key, V value) { ... }
    public ProducerRecord (
        String topic, Integer partition, K key, V value, Iterable <Header> headers) { ... }
    public ProducerRecord (
        String topic, Integer partition, Long timestamp, K key, V value, Iterable <Header> headers) { ... }

    public K key () { ... }
    public V value () { ... }
    public Headers headers () { ... }

    ...
}

public interface Header {
    String key ();
    byte [] value ();
}

public final class RecordMetadata {
    public boolean hasOffset () { ... }
    public long offset () { ... }
    public boolean hasTimestamp () { ... }
    public long timestamp () { ... }

    public String topic () { ... }
    public int partition () { ... }

    public int serializedKeySize () { ... }
    public int serializedValueSize () { ... }
}

public interface Callback {
    void onCompletion (RecordMetadata metadata, Exception exception);
}