CREATE AND RESOLVE JAVA SOURCE NAMED "MyClass" AS
import java.io.*;
import java.sql.*;

public class MyClass
{
public static void getList(String directory)
                   throws SQLException
{
    File path = new File( directory );
.
.
.

}

}

ORA-29538: Java not installed

CREATE JAVA SOURCE NAMED "Hello" AS
   public class Hello {
      public static String hello() {
         return "Hello World";   } };

CREATE PROCEDURE MainMyClass( p_directory varchar2 )
as language java
name 'MyClass.getList( java.lang.String )';