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what are the Different types of exceptions in JDBC?
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Exceptions in JDBC are usually of two types:
Exceptions occurring in the JDBC driver
Exceptions occurring in the Oracle 8i database itself
Just as PL/SQL provides for an implicit or explicit RAISE
statement for an exception, Oracle JDBC programs have a
throw statement that is used to inform that JDBC calls
throw the SQL exceptions. This is shown below.
throws SQLException
This creates instances of the class java.sql.SQLException
or a subclass of it.
And, like in PL/SQL, SQL exceptions in JDBC have to be
handled explicitly. Similar to PL/SQL exception handling
sections, Java provides a try..catch section that can
handle all exceptions including SQL exceptions. Handling an
exception can basically include retrieving the error code,
error text, the SQL state, and/or printing the error stack
trace. The SQLException class provides methods for
obtaining all of this information in case of error
conditions.
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i am user who logined the application..after that another valid user will also logind..so that is it neccessary to create jdbc connection for each and every user...plz explain it with proper answer...plz help me
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