Java

JDBC is a standard Java API that provides a common interfaces for accessing databases in Java.

Example method used in implementation:

import java.sql.*;
import java.util.Properties;

public class Main {
    public static void main(String[] args) {
        try {
            Properties properties = new Properties();
            properties.put("user", "admin");
            properties.put("password", "<PASSWORD>");
            properties.put("ssl", true);
            Connection conn = DriverManager.getConnection(
                    "crate://<name-of-your-cluster>.cratedb.net:5432/",
                    properties
            );

            Statement statement = conn.createStatement();
            ResultSet resultSet = statement.executeQuery("SELECT name FROM sys.cluster");
            resultSet.next();
            String name = resultSet.getString("name");

            System.out.println(name);
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

See full documentation here.