Although Java does not provide a destructor as in C++, you can use an overridden finalize() method for similar purposes. The overridden finalize() method is invoked on an object before

Even though Java does not have a constant type, you can achieve the same effect by declaring and initializing variables that are static, public, and final. After the variables have

Many developers using ODBC, JDBC, OLE DB, and ADO are unaware that there is a standards-compliant solution for expressing dates, times, and timestamps in SQL statements. When writing queries in

“ODBC-compliant database” and “JDBC-compliant database” are nonsequiturs. ODBC and JDBC clients can connect to databases that store behavior in the form of methods, triggers, constraints, and stored procedures. The ODBC

You can make your Web pages load faster if you reduce the color depth of in-line graphics. This will make your page more useable, impress your audience, and even save

This tip works equally well in both the Windows NT and Windows 95 browsers, and makes managing HTML files a bit easier by adding some file-type specific menu items to

Namespaces do not incur runtime or memory overhead. The technique used to represent namespaces is called name mangling. This same technique is used to create unique names for overloaded functions

When creating menus and command buttons, use the ampersand symbol to create a shortcut key for that option. For example, you might use “&Cancel” for a command button with a

VB doesn’t have a function to replace part of a string (of n-length) with another string (of x-length). The Mid() statement works only with target and replacement strings of the

Use the Win32 API to set tab stops in a Visual Basic list box by creating these declarations and routine in a module: Public Const LB_SETTABSTOPS = &H192Declare Function SendMessage

To change text in a text box to uppercase as soon as the user types it in, use this code: Private Sub txtname_KeyPress(KeyAscii As Integer) ‘Puts in uppercase as soon

Not all ActiveX DLL and OCX files include installation programs to properly register the control. You need to run REGSVR32.EXE manually to perform the registration. You can save time by

Many programmers mistakenly believe they can remove all the items from a collection by setting the collection itself to Nothing: Dim children as New Collection…Set children = Nothing This technique

Question: I have developed an application in Delphi 3.0 Client/Server Suite. It reads and validates records from an Access 95 database and then writes to AS400. The software processes 606

Question: How do I save data entered in a list box at run time without resorting to a text file or having to deal with the overhead of a table?

Question: Is there a way under Delphi 3 and 4 to determine if a previous instance of the application is already running? Answer: Yes, there is a way to determine

Question: I am finding it difficult to check whether an error has occurred in selecting a drive when it is not available at the time. I have tried to use

Question: I am unable to post records permanently to Paradox tables using Delphi 3. The records appear in the table object but disappear after I exit Delphi and start another

Question: How can I make the contents of a table change when the user selects a different radio button? Just like “Button” input type has an event called “onClick,” is

Question: Hello from France,I’m on Windows NT4.0 with SQL Server 6.5and Visual Interdev. I use the DataForm wizard to connect to a data base. When I’m on the xxxxlist.asp with

Question: I am trying to migrate an Access97 database application to a Web-based application. I bought InterDev because it purportedly makes this process easy. But I cannot create a form

Question: I know how to use the new RecordSet control from VI6 to display records into a Grid; but how do I implement a query at runtime? For example: SQL

Inner classes often make your programming task easier by eliminating the requirement to write parameterized constructors for your classes and to pass references as parameters. A method in an inner

Sometimes it’s necessary to create your own RDS server object because of some inherent limitations of the built-in RDSServer.DataFactory object. If you find it necessary to build your own version

Inner classes are useful for instantiating and registering listeners on event sources. When should you use an anonymous inner class and when should you use a regular inner class? If

Question: How do you protect an application with a password and store it in the application’s exe-file? Answer: You’d have to hard code the password in. Then in the FormCreate

Question: I’m developing a program that lists all of a shop’s clients and the items that they purchased. The problem is that if some clients haven’t bought anything, they don’t

The way you create a set of radio buttons is significantly different between Swing and the AWT. With Swing, you instantiate the buttons and add them to a group object