Call a procedure with one IN parameter in Java

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import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;

public class Main {
  public static void main(String[] args) throws Exception {
    Connection connection = getConnection();
    // Call a procedure with no parameters
    CallableStatement cs = connection.prepareCall("{call myprocin(?)}");
   
    // Set the value for the IN parameter
    cs.setString(1, "a string");

    cs.execute();

  }

  private static Connection getConnection() throws Exception {
    Class.forName("org.hsqldb.jdbcDriver");
    String url = "jdbc:hsqldb:mem:data/tutorial";

    return DriverManager.getConnection(url, "sa", "");
  }
}