Use java to read files larger than 2GB into memory

Since bytearrayinputstream is limited to 2GB, is there any alternative solution that allows me to store all the contents of 2.3GB (possibly larger) files in an InputStream read by stax2?

Current code:

XMLInputFactory xmlInputFactory = XMLInputFactory.newInstance();
            XMLStreamReader xmlStreamReader = xmlInputFactory.createXMLStreamReader(in); //ByteArrayInputStream????
            try
            {
                SchemaFactory factory = SchemaFactory.newInstance("http://www.w3.org/2001/XMLSchema");

                Schema schema = factory.newSchema(new StreamSource(schemaInputStream));
                Validator validator = schema.newValidator();
                validator.validate(new StAXSource(xmlStreamReader));

            }

            finally
            {
                xmlStreamReader.close();
            }

For performance tuning, the variable in must not come from disk I have a lot of ram

Solution

Use NiO to read the file into a huge ByteBuffer, and then create a stream class to read ByteBuffer There are several such floats in open source