Using ojdbc5 and ojdbc8 driver in the same application with java11+

In my program I have to connect to several databases. For certain reasons I have to use several different ojdbc drivers, e.g. ojdbc5.jar, ojdbc8.jar, etc. Nothing can be changed about that.
With Java 8 it works like this:

import java.io.File;
import java.net.URL;
import java.net.URLClassLoader;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.Driver;
import java.util.Properties;

public class JdbcMain {

public static void main(final String[] args) throws Exception {
	final File driverOne = new File("C:\\workspace\\lib\\ojdbc5.jar");
	final File driverTwo = new File("C:\\workspace\\lib\\ojdbc8.jar");
	
	getJDBCForDriver(driverOne);
	getJDBCForDriver(driverTwo);
}

private static void getJDBCForDriver(final File jdbcDriverFile) throws Exception {
	final URL url = jdbcDriverFile.toURI().toURL();
	final URL[] array = new URL[] {url};
	final URLClassLoader ucl = new URLClassLoader(array, null);
	final Class driverClass = ucl.loadClass("oracle.jdbc.driver.OracleDriver");
	final Driver driver = (Driver) driverClass.getDeclaredConstructor().newInstance(); 

	final Properties prop = new Properties();
	prop.put("user", "myUser");
	prop.put("password", "myPassword");
	try (final Connection connection = driver.connect("jdbc:oracle:thin:@localhost:1521:xe", prop)) {
		final DatabaseMetaData metaData = connection.getMetaData();
		final int jdbcMajorVersion = metaData.getJDBCMajorVersion();
		final int jdbcMinorVersion = metaData.getJDBCMinorVersion();
		System.out.println("JDBC Version for File " + jdbcDriverFile.getName() + ": " + jdbcMajorVersion + "." + jdbcMinorVersion);
	}
}
}

The output for Java 8 is:

JDBC Version for File ojdbc5.jar: 11.1
JDBC Version for File ojdbc8.jar: 4.2

Since Java 11 (or 9), however, this no longer works. The following error occurs here:

Exception in thread "main" java.lang.NoClassDefFoundError: java/sql/Driver
	at java.base/java.lang.ClassLoader.defineClass1(Native Method)
	at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
	at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174)
	at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:550)
	at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:458)
	at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:452)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:451)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
	at zzzz_Jdbc.JdbcMain.getJDBCForDriver(JdbcMain.java:26)
	at zzzz_Jdbc.JdbcMain.main(JdbcMain.java:17)
Caused by: java.lang.ClassNotFoundException: java.sql.Driver
	at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
	... 12 more

Any ideas how to solve this?