ClassCastException with SignedObject

Question

I have a signed object which I store as a blob in an sql database. In order to retrieve the signed object, i do the following:
String driver = "org.gjt.mm.mysql.Driver";
String url = "jdbc:mysql://127.0.0.1:3306/database";
Class.forName(driver);
connection = DriverManager.getConnection(url,"user", "pass");
Statement stmt = connection.createStatement();
String query = "select * from registered_doctor;";
ResultSet result = stmt.executeQuery( query );
while( result.next() )
    String str = result.getString( "id" );
    Object obj = result.getObject( "token" );
    System.out.println( "Id: " + str + "; token: " + obj.toString() );
    SignedObject so = (SignedObject) obj;
}Under windows, this code works perfectly, I can then pass the signed object to other methods.
I am porting my code to Linux platforms, and the operation
    SignedObject so = (SignedObject) obj;Throws an exception:
Id: 12; token: [B@161d36b
java.lang.ClassCastException
        at Connect.getConn(Connect.java:71)
        at Connect.main(Connect.java:11)I have no idea what is wrong, and suspecting Classpath problems, but I was hoping for some guidance.
Many thanks
Seb

Answer 1

Okay, clearly you pointed out my problem:
Id: 22; token: [B@161d36b
Actual object class: class [B
Expected object class: class
java.security.SignedObjectWhat can I do?Like I said in my second reply, I'd suggest you store fields that make up the object, not the object itself in the database.