barcode generator in vb.net 2010 Click the Accept button to finish. in Java

Render Code39 in Java Click the Accept button to finish.

can display when dialing a phone number or entering a PIN. Users generally have the option to show or hide the keyboard in order to manage the amount of visible space shown.

Finally, we specify the default search depth to be used if the single-argument constructor is used:

Portlet Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

Templates support nontype template parameters; generics don t. Templates support specialization and partial specialization; generics don t. Templates work better with mathematical operations; unconstrained generics don t allow the use of mathematical operators on the unknown type parameter, and there are no viable constraints for families of primitive types (e.g., int, double, etc.). Generic types cannot inherit from the type parameter, as is possible with templates. Generics have no equivalent of template metaprogramming, that is, using template expansion by the compiler to perform operations. Templates are compiled at the time of instantiation; generics are compiled at the point of definition. The last point bears some further explanation, since it has far-reaching implications in terms of what code is allowed in a generic class. The basic rule is that a generic class may not include any code that is not ensured to compile with any type argument. Think about the fact that the compiler will not even know what types might eventually be used as type arguments. You could compile G<T> today and deploy it somewhere, and years later someone could instantiate it with a type that never even existed when G<T> was compiled. This would not be possible if just any code were allowed to compile. That s the reason why constraints are so important in generic classes. In order to call a method on a type parameter, the compiler must be certain that that method is in fact available for every allowable type argument that may be used. The runtime must also be equally forceful in insisting that only types that meet the constraints are allowed to be used as type arguments. Contrast this with templates, in which you can make all kinds of unstated assumptions about the type (such as assuming the type has certain methods, operators, and so on) that might be used as a type parameter, without any worries because you know that when someone tries to instantiate your template, the compiler will check the template with the actual type that is being used. You don t have to constrain the template type parameter because the type never remains unknown at runtime. To drive home the point, consider a template class that works with mathematical entities and assumes the existence of a + operator on the type, as in Listing 11-31. Listing 11-31. Assuming the Existence of an Operator template <class T> ref class A { // assumes T supports the + operator T add(T t1, T t2) { return t1 + t2; } }; If you want a generic class that does this, you probably need to define an interface constraint and add that interface to any types that are to be used as a type argument, as in Listing 11-32.

Figure 3 9. SQL AzureFirewall Settings 3. Click the Add Rule button, and when the popup appears, enter MyComputer into the Name text box. Notice that the popup displays your IP address, which you should now copy and paste into the IP Range text boxes, as shown in Figure 3 10.

Use Singletons when you want to share data or resources between clients. But always keep in mind Tip that more than one client might access the same object at any given time, so you have to write the serverside code in a thread-safe way.

Note Strictly speaking, it is possible to avoid the need to have copies of the interface and parameter objects

This example started life as a production issue, before being stripped back to a simple test case. The original code was running under 8i, and displaying an odd performance problem, so I re-created the data on a 9i database to see if the problem would go away and it did. I then discovered that the problem had gone away because CPU costing allowed the optimizer in 9i to do something that the 8i optimizer could not do.