Performance tuning of Servlets is a major criteria as a servlet is expected to simultaneously handle dozens, if not hundreds, of threads depending on the requests. These coexisting threads have

When a Java applet or application loads a JDBC driver, the code is dynamically retrieved from the network. Loading the Sybase JDBC driver requires a simple line of code: Class.forName(“com.sybase.jdbc.SybDriver”);

When performance is an issue, static arrays perform better than dynamic storage structures. However, if a static structure won’t work, consider using Java’s Vector class instead of the LinkedList class.

When writing Java-based services we occasionally require dependencies. That is, our services must start in a certain order. You can specify what services your code is dependent on by overriding

You can use a name for a Java method that is different from the name the DLL uses when it exports the function. For example. you may need to conform

When using CSS (Cascading Style Sheets) positioning, you can apply a number of techniques to make your code faster. When accessing and setting the position of an element, instead of

Question: Is there any way to manipulate the border of a select list? It works fine on all the other existing form elements except the select. The solution must be

Question: Will the VBScript in the coming version Visual Basic 7 be platform independent? Answer: Unless Microsoft decides to radically change things, Visual Basic 7.0 will not use Visual Basic

Question: Is it advantageous to use ANSI SQL syntax or SQL Server syntax? For example, Inner Joins: Select * from T1 inner Join T2 on t1.id=t2.idSelect * from T1,T2 where

Question: I have a table that contains about six million records. Each record contains some sensitive data or data that be accessible by the public. What would be the best

Question: I used PowerBuilder with another database tool at my previous employer. Unfortunately, I have transferred to another company that uses Oracle and Oracle Developer. Can I use PowerBuilder with

Question: How can I refresh or redraw a menu? Answer: If you make one of the menu items nonvisible and then make it visible again, it should refresh the menu

Question: Our company is developing a Web site with some ActiveX code. On Windows 98 with Internet Explorer 5 loaded, some can see that portion of code perfectly, and then

Question: How do I set up a shared calendar, or at least public access to other people’s private calendar, in a network that uses Outlook 2000 and Windows NT server

Question: When I pass a string containing an embedded apostrophe in a query to SQL Server, it sees the apostrophe as an end-of-string marker. Example: “Select * from Members Where

Question: Can I pass ADO objects like Command and Recordset to an ActiveX DLL (acting as a middle layer) so that it automatically fills the data in them and I

Question: I am aware of the recommended approach to developing three-tier systems?for example, presentation layer to business objects to data objects. Say I have a system that has a data

Unlike regular forms, forms don’t expose the MinButton and MaxButton properties and these buttons are always displayed. You can suppress these buttons using the following code: Private Declare Function SetWindowLong

The CommonDialog control doesn’t provide any direct way to decide where a common dialog appears on the screen. In all cases, in fact, the control tries to display the common

The most intuitive way to append a string to the current contents of a TextBox is through the & string operator, as in: Text1.Text = Text1.Text & “more text” However,

As explained in another tip in this TipBank, users can peek at the contents of password-protected TextBox controls with a simple Spy-like program, or even with a VB program plus

Visual Basic lacks of the capability to display a short description of the menu command being highlighted with the mouse or the keyboard, a feature that all professional applications should

When the user clicks on an iconized (minimized) form in the taskbar, Windows sends that form a WM_QUERYOPEN message, and inspects the value returned to the operating system. If this

You’ve taken the trouble to write a Java applet, so you naturally want everyone to see it. Unfortunately, there are some viewers that still don’t have a Java-capable browser or

The JPasswordField included in Swing exhibits a strange behavior?it moves the caret to the right as far as the width of the character you already typed. The problem is that

You should always prefer to cache commonly used select lists in the Application object. In a typical Web application, you make a database server trip to get to the list.

Browsers Targeted: Internet Explorer 4+ You can retrieve any component of a date (either as a string, a hash-delimited date expression, or a date object) with the DatePart() function in

Question: Why do certain things like tables and frames work fine with Internet Explorer but not with Netscape? Answer: There are many differences in the way the two major browsers