Connect the Java driver to your database

DataStax recommends using the Java client with Serverless (Vector) databases. Use the Java driver only if you are working with an existing application that previously used a CQL-based driver or if you plan to explicitly use CQL.

Initialize the Java driver to connect to your database.


This code imports the necessary classes, sets up a CqlSession with a secure connect bundle, authenticates credentials, and specifies a default keyspace.

import com.datastax.oss.driver.api.core.CqlSession;
import com.datastax.oss.driver.api.core.cql.ResultSet;
import com.datastax.oss.driver.api.core.cql.Row;
import com.datastax.oss.driver.api.core.CqlSessionBuilder;
import com.datastax.oss.driver.api.core.cql.PreparedStatement;
import com.datastax.oss.driver.api.core.type.codec.TypeCodecs;

import java.nio.file.Paths;
import java.util.Arrays;
import java.util.List;

public class VectorTest {
    public static void main(String[] args) {
        // Initialize the Java driver
        String keyspace = "default_keyspace";
        CqlSessionBuilder builder = CqlSession.builder();
        builder.withAuthCredentials("token", System.getenv("ASTRA_DB_APPLICATION_TOKEN"));

        try (CqlSession session = {
            int v_dimension = 5;
            // ...

See the Java quickstart for details on how to add dependencies, connect to a Serverless (Vector) database, create a table and vector-compatible SAI (Storage-Attached Index), load data, and perform a similarity search.

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