Array between Oracle and Java

CREATE OR REPLACE AND RESOLVE JAVA SOURCE NAMED ALWORKSHOP."myOracle/TestStaticsInOracleServer" as

package myOracle;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Enumeration;
import java.util.Vector;
import oracle.sql.ARRAY;
import oracle.sql.ArrayDescriptor;

public class TestStaticsInOracleServer {
  
  private static Vector v = new Vector();

  public static void addLineToVector(String line) {
    v.add(line);
  }
  
  public static int getVectorSize() {
    return v.size();
  }
  
  /**
   * @param structureTypeName For example ALWORKSHOP.TABLEOFVARCHAR2 
   */
  public static oracle.sql.ARRAY getElementsAsArray(String structureTypeName) 
    throws SQLException {
    Connection c = DriverManager.getConnection("jdbc:default:connection");
    ArrayDescriptor descriptor = ArrayDescriptor.createDescriptor(
                                                          structureTypeName, c);
    String[] list = new String[v.size()];
    { /* Create the list */
      int i = 0;
      for(Enumeration e = v.elements(); e.hasMoreElements();) {
        String s = (String)e.nextElement();
        list[i++] = s;
      }
    }
    ARRAY result = new ARRAY(descriptor, c, list);
    return result;
  }
}

CREATE OR REPLACE PACKAGE myjavautils AUTHID CURRENT_USER AS
-- TEST --
procedure addLineToVector(line in varchar2);
function getVectorSize return number;
function getElementsAsArray(structureTypeName in varchar2) return TABLEOFVARCHAR2;
END myjavautils;
/

Create package body
CREATE OR REPLACE PACKAGE BODY myjavautils AS
-- TEST --
procedure addLineToVector(line in varchar2) as
LANGUAGE JAVA NAME 'myOracle.TestStaticsInOracleServer.addLineToVector(java.lang.String)';

function getVectorSize return number as
LANGUAGE JAVA NAME 'myOracle.TestStaticsInOracleServer.getVectorSize() return int';

function getElementsAsArray(structureTypeName in varchar2) return TABLEOFVARCHAR2 as
LANGUAGE JAVA NAME 'myOracle.TestStaticsInOracleServer.getElementsAsArray(java.lang.String) return oracle.sql.ARRAY';

END myjavautils;
/

Test
create or replace type TABLEOFVARCHAR2 as table of varchar2(255);
declare
	   l TABLEOFVARCHAR2;
	   i integer;
begin
	 myjavautils.addLineToVector('monazzo');
	 dbms_output.put_line(myjavautils.getVectorSize);
	 l := myjavautils.getElementsAsArray('ALWORKSHOP.TABLEOFVARCHAR2');
	 FOR i IN l.FIRST .. l.LAST
	 loop
	 	 dbms_output.put_line(l(i));
	 end loop;
end;