In Java, a readable, writable directory should be empty before an attempt is made to remove it. The following code recursively empties a directory, and its sub-directories, and then removes

With applets, sometimes the browser acts as the applet’s frame. This prevents the user from mistaking the browser window for a separate application and closing it. With this approach, the

Sometimes it is useful to have a text field, for which you can specify a max number of characters. The following class give you just that: import java.awt.*; import java.awt.event.*;

You can easily add a background image to swing’s JTable. The following code shows you how: Note that the image scrolls with the table. public class BackgroundTable { public static

Line separators are dependent on the operating system. This may cause some annoyance when opening files created on another operating system. For example, if you are using Microsoft Windows, and

Cell data in a table may exceed the width of its column. It is a good, user-friendly, idea to have ToolTips appear in a cell showing the entire cell data

In Java you take the remainder with the modulus (%) operator, whereby the sign of the remainder follows the dividend, not the divisor. So (+5 % -2) will be, to

Browsers Targeted: Internet Explorer 3+ It’s fairly easy to confuse the Cascading Style Sheets (CSS) properties display and visibility, because it would seem that they do much the same thing.

Question: I have an Informix database on a remote server and I’m trying to perform ODBC from my client machine. I have installed the client products on my Windows 98

Question: I can’t find the sqexplain.out file. Where is it? Answer: In UNIX systems, this file is usually placed in the directory from which you called the dbaccess or other

Question: Is there a simple test that can determine whether a VB program is running in the IDE or as a compiled exe? Answer: Yes there is a very simple

Content ratings help your users?especially families?know what type of content your site provides. Microsoft Internet Information Server (IIS) 4 lets you add content ratings to any page. Try this: In

Session variables are a boon to ASP developers because they allow you to maintain variables from one page to another. However, the use of session tracking may make Internet Information

Although the use of global variables is not recommended in general, sometimes it’s unavoidable. When using a global variable or object, never instantiate it in a header file because the

Class std::string’s overloaded operator == performs a case-sensitive comparison. This means that the following strings are not identical when compared using ==: string s1 = “Jellylorum”; string s2 = “JellyLorum”;

C++ distinguishes between two initialization types for objects with static storage duration (global objects are an example of objects having static storage). Static initialization consists of either zero-initialization or initialization

Although the following statements are semantically equivalent string * p = new string(); //with empty parentheses string * p = new string; //no parentheses The second one is preferable for

In C++ (but not in C), a const object declared in the global scope has internal linkage by default. This means that a const object which apparently looks like a

Question: I have written the following SQL statement and want to update only the end date field (saaphy01.n5ajdd) in one file. How can I tell it in my query to

Question: I want to create two count-variables in one SQL query based on GROUP BY signum_chef. Is that possible? I’ve tried something like this: SELECT DISTINCT signum_chef, Antal=(SELECT COUNT (*)),

Question: What is the difference between Microsoft Exchange and Outlook? We only use Exchange on our workstations, but I have an icon on my desktop for Outlook. Please explain. Answer:

Question: I’m trying to access a particular field via an ASP. I presently have a table displaying multiple fields. Everything works fine, but as soon as I try to add

When you right-click a TextBox control, Windows sends it a WM_CONTEXTMENU message, to which VB reacts by displaying the default Edit popup menu, that contains editing commands such as Cut,

Whenever the system time or the display resolution changes, Windows sends all the top-level windows (forms, in VB jargon) the WM_TIMECHANGE or WM_DISPLAYCHANGE message, respectively. Therefore, you can easily determine