Accessing Binary/LongBinary Data from MS-Access

Question

Dear Friends,
I've been trying to work with binary and longbinary data types supported by MS-Access.
I'm able to insert the value in the table but retrieval is the problem.
I m using the following code,
I've used Jdbc-Odbc connection using the following code,
Class.forName ( "sun.jdbc.odbc.JdbcOdbcDriver" );
Connection conDBConnection = java.sql.DriverManager.getConnection ( "jdbc:odbc:Driver=
{Microsoft Access" );Driver (*.mdb)};DBQ=D:\\mydb.mdb";
* inserting record in MS-Access Table through jdbc-odbc connection
* @return
protected boolean insertRecord()
try
/* Creating a temporary table
String sql = "create table temp ( id int, file LONGBINARY)";
stmt = conDBConnection.prepareStatement (sql,ResultSet.TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_UPDATABLE );
stmt.executeUpdate();
byte b[];
for(int i=9990;i<10000;i++)
sql = "INSERT INTO temp(id,file) VALUES(" + i + ",?)";
stmt = conDBConnection.prepareStatement (sql,ResultSet.TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_UPDATABLE );
b = (i+" some text").getBytes (); // want to store this data as long binary
ByteArrayInputStream bis = new ByteArrayInputStream (b);
stmt.setBinaryStream (1,bis,b.length);
stmt.executeUpdate ();
}catch(Exception e)
System.out.println ("Error : while Inserting Record");
e.printStackTrace ();
return false
return true; // default
}// end of insertRecord ()
/* -----------------------------end of insertRecord ()--------------------------------------*/
protected boolean readRecord ()
try
String sql = "Select * from temp";
stmt = conDBConnection.prepareStatement (sql);
rs = stmt.executeQuery ();
while( rs.next() )
/** I get ClassCastException on the following line
ByteArrayInputStream bytinputstream = (ByteArrayInputStream) rs.getBinaryStream("file");
int i=0;
while( (i++) < bytinputstream.available() )
System.out.println(bytinputstream.read());
}catch(Exception e)
e.printStackTrace();
return false;
return true;
/* -----------------------------end of readRecord ()--------------------------------------*/

Answer 1

The InputStream that getBinaryStream() returns is evidently not a ByteArrayInputStream. So you can't cast it to a ByteArrayInputStream variable. Just change the variable to be an InputStream and drop the casting.