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Tip Bank > Testing and QA

Testing and QA - Page 4

Debugging
error
Profiling
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Determine if an Error Has Occured During Object Construction
by Sandeep Gain
This can be achieved in java by throwing an exception from your Constructor. Since Constructors cannot return a value, this is the only way you can achieve error handling.
Use VB's Date/Time Picker Control With No Date
by Jason Ingram
Using the DTPicker control is good except if you
Optimizing String Classes in Java Code
by Naveet Gupta
The String class is probably one of the most used classes in Java. String concatenation via the
Exception Handling, Inheritance and the Need For Strict Rules
by Anil Nair
Java has some strict rules for exception handling when it comes to inheritance and overriding of methods.
View Recordsets in Temporary Grids
by Nazmul Siddiqui
An alternate, convenient way to view recordsets in debug mode is to persist a recordset to disk using rs.save MyFileUNC.ADTG in the immediate window. Note that the file must be of ADTG type (*.
Populating Controls From a Recordset
by Nazmul Siddiqui
On a form, basing populating controls on a supplied record may lead to error, because a perfect match is needed between the control tags and the field list. Any pre-specified error handler jumps ...
Returning a Value from a Function that Throws
by Danny Kalev
A reader asked me the following questions: "Can a function that returns something, throw a exception and still return a value?" Lets' look at a concrete ...
Passing an ActiveX Control As a Parameter
by Mahesh Hegade
Trying to pass an ActiveX control as a parameter to a method on an external ActiveX DLL (or EXE), garners a
Use printStackTrace() method to generate stack
by Deepak Pant
Stack trace is a kind of call stack, which maintains the call sequence of methods at any given point in time. Throwable class in Java provides a method called "printStackTrace()" which can be ...
Java Profiler
by DevX Pro
Is there a profiler like JProbe which supports the Microsoft Virtual Machine? I already tried the -prof switch on the command line, but that doesn't do everything I need.
Significance of const Return
by DevX Pro
What is the significance of const return type from a function? Similar to: const int func1();
Rethrowing a Throwable Exception in Your Code
by Mahesh Chulet
Use the fillInStackTrace() method to rethrow a Throwable type of exceptional condition in your code. This is useful if you want to rethrow a exception that occurred while using a method or creating a ...
xp_cmdshell and Windows Apps
by DevX Pro
Why can't I run an application like ws-ftp from SQL with xp_xmdshell? ws-ftp will start, but it's not visible on the screen.
Violating an Exception Specification
by Danny Kalev
The implementation ensures that functions having an exception specification should throw only exceptions that are listed in their exception specification. For ...
Leave a Grain of Debugging Info in Your Release Version
by Danny Kalev
It may be tempting to squeeze an extra pint of performance by removing all debug information from the release version. However, it's recommended to leave minimal debugging info even in the release ...
Cannot Quit FoxPro
by DevX Pro
I have built an executable file and included a READ EVENTS command. After running the .exe, I am unable to quit VFP. The message I get reads: "Cannot quit FoxPro."
Function's Return Value
by DevX Pro
I'd like to know how can I make a return of a function's local variable (for example, a reference to it) not using pointers technique?
Keyword 'huge'
by DevX Pro
I am getting a compile error 'huge' obsolete keyword. I am converting a process from Visual C++ 2.0 to 6.0. What keyword could I use in place of 'huge'?
Stack Unwinding in the Event of an Uncaught Exception
by Danny Kalev
When an exception is thrown and no matching handler can be found for it, C++ invokes the function terminate(). By default, terminates invokes the function abort(). Some compilers guarantee that at ...
Differences in Execution Flow
by DevX Pro
Why would a program not yield any errors, and yet not run on one system, while resulting in a perfect run (unchanged) on another system? Specifically, a switch statement was completely ignored on my system, yet functioned accurately on my professor's.
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