How to Get Parameter Count from Parameter MetaData

package example.jdbc.parametermetadata;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ParameterMetaData;
import java.sql.PreparedStatement;
import java.sql.Statement;
 
public class Main6 {
    public static void main(String[] args) throws Exception {
	Connection conn = getHSQLConnection();
	System.out.println("Got Connection.");
	Statement st = conn.createStatement();
	st.executeUpdate("create table survey (id int,name varchar);");
	st.executeUpdate("create view surveyView as (select * from survey);");
	st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");
 
	PreparedStatement pstmt = null;
	ParameterMetaData paramMetaData = null;
	String query = "select * from survey where id > ? and name = ?";
	pstmt = conn.prepareStatement(query);
	paramMetaData = pstmt.getParameterMetaData();
	if (paramMetaData == null) {
	    System.out.println("db vendor does NOT support ParameterMetaData");
	} else {
	    System.out.println("db vendor supports ParameterMetaData");
	    // find out the number of dynamic parameters
	    int paramCount = paramMetaData.getParameterCount();
	    System.out.println("paramCount=" + paramCount);
	}
 
	pstmt.close();
	conn.close();
 
    }
 
    private static Connection getHSQLConnection() throws Exception {
	Class.forName("org.hsqldb.jdbcDriver");
	System.out.println("Driver Loaded.");
	String url = "jdbc:hsqldb:data/tutorial";
	return DriverManager.getConnection(url, "sa", "");
    }
 
    public static Connection getMySqlConnection() throws Exception {
	String driver = "org.gjt.mm.mysql.Driver";
	String url = "jdbc:mysql://localhost/demo2s";
	String username = "oost";
	String password = "oost";
 
	Class.forName(driver);
	Connection conn = DriverManager.getConnection(url, username, password);
	return conn;
    }
 
    public static Connection getOracleConnection() throws Exception {
	String driver = "oracle.jdbc.driver.OracleDriver";
	String url = "jdbc:oracle:thin:@localhost:1521:caspian";
	String username = "mp";
	String password = "mp2";
 
	Class.forName(driver); // load Oracle driver
	Connection conn = DriverManager.getConnection(url, username, password);
	return conn;
    }
}