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Performance
If you have any web performance issues, here is a useful checklist --
Check if you access any database table(s). If yes,
check if the table(s) column(s) have an index.
Check if use a Java Script. If yes, check if there is a loop
in the JavaScript
Check if you are retrieving the data with one database call instead of
multiple database calls which increase as your stored data grows.
Check your CPU and memory utilization. This may indicate a loop in your server code.
Hibernate & Spring
You can use Hibernate callback feature to
retrieve
information from different,
but related database tables. Avoids getting Hibernate's lazy
initiation error
Example
Callback
If you use Spring and save data,
you can use Spring transaction annotation.
Example
Spring Annotation
JDBC
Use java.sql.Timestamp to get date and time
Databases
Database tips
Google Maps
Google Map setup
Others
Use Shift and Enter key to single space if you are in rich text area
Use Alt key and Enter key if you want to wrap text within a cell in Microsoft Excel
Using Ajax with Perl/CGI.Java
Process various types of Java collections.
Process
Java Collection
Compare float numbers in Java
Compare Java
Float Numbers