setQueryTimeOut(1) - not expected result...

Hallo,

assuming one has 2 users which try to lock the same record for edit at a time 
the one coming later should be informed of the situation, i like to do the 
following:

//user1:

stmt.setQueryTimeout(1);//wait just one second
ResultSet rs=stmt.executeQuery("BEGIN;SELECT * FROM mytable FOR UPDATE OF 
mytable");

//user2:

stmt.setQueryTimeout(1);
ResultSet rs=stmt.executeQuery("BEGIN;SELECT * FROM mytable FOR UPDATE OF 
mytable");
(if timeoutinform user...)

I would think, that the second user get's a query timeout on his query, but it 
does not seem to work. Instead the think seems to wait forever.

Immediately after user1 does and "COMMIT;" the user2 get's his ResultSet.

What am i doing wrong?

Guido