simple insert operation

Hii guys,

I am very newbie about postgresql and I am making practice,
however I couldnt been able to insert a simple item to my DB via jdbc...

here is my code for insertion...

Class.forName("org.postgresql.Driver");
String connectionStr = "jdbc:postgresql://localhost:5432/XXXX";
Connection connection =
java.sql.DriverManager.getConnection(connectionStr, "XXXX", "XXXX");
String sqlQuery = "INSERT INTO passTable (idCol , pass) VALUES
(3, 5)";
PreparedStatement query = connection.prepareStatement(sqlQuery);
query.executeUpdate();
connection.close();

but I cant compile it

the errors

-------------------------------------------------------------------------------------------
form.java:26: unreported exception java.lang.ClassNotFoundException;
must be cau
ght or declared to be thrown
Class.forName("org.postgresql.Driver");
^
form.java:28: unreported exception java.sql.SQLException; must be caught
or decl
ared to be thrown
Connection connection =
java.sql.DriverManager.getConnection(con
nectionStr, "XXXX", "XXXX");

^
form.java:30: unreported exception java.sql.SQLException; must be caught
or decl
ared to be thrown
PreparedStatement query =
connection.prepareStatement(sqlQuery);

^
form.java:31: unreported exception java.sql.SQLException; must be caught
or decl
ared to be thrown
query.executeUpdate();
^
form.java:32: unreported exception java.sql.SQLException; must be caught
or decl
ared to be thrown
connection.close();
^
5 errors
-------------------------------------------------------------------------------------------

what is the problem I am stuck with it..