Converting NUMBER, DATE and VARCHAR2 database fields from Resultset to variables?

[Sven Mayer]

Assume a database (e.g. Oracle) field is declared as
a) NUMBER (length=10)
b) NUMBER (length=26)
c) VARCHAR2 (length=1)
d) VARCHAR2 (length=50)
e) DATE

How do I retrieve the contents from these resultset fields and put it into a (numeric) java resp Date field?

For other field types it is already clear e.g.):

ResultSet rs = executeQuery(....);
....

int i = rs.getInt(1); // for INTEGER database fields
String s = rs.getString(2) // for VARCHAR database fields (not VARCHAR2 !!)
double d = rs.getDouble(3) // for DECIMAL database fields

How are the corresponding assign statements for NUMBER, VARCHAR2 and DATE ?

Sven