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A hover button changes appearance when touched by a mouse pointer A related group of horizontally or vertically aligned links is called a link bar Including a link to an e-mail window helps users contact the site s Webmaster or owner Listing 5-8 is the JAD file for Listing 5-9 Listing 5-9 illustrates the technique for throwing a MIDletStateChangeException from within the destroyApp() method Remember that a MIDletStateChangeException can also be thrown from the startApp() method using an approach similar to the one used in Listing 5-9 vb.net ean 13 reader .NET EAN - 13 Barcode Reader for C#, VB . NET , ASP.NET Applications
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16 Sep 2008 ... Demonstrates creating EAN - 13 Barcodes with VB . NET . ... programs for hand held devices which came with an integrated barcode reader . As you can see, the calls to put( ) and get( ) are synchronized That is, each call to put( ) is followed by a call to get( ) and no values are missed Without the semaphores, multiple calls to put( ) would have occurred without matching calls to get( ), resulting in values being missed (To prove this, remove the semaphore code and observe the results) 26: 1 Define navigation link, hover button, interactive button, active button, link bar, footer 2 Identify at least two ways that you can control a navigation button s appearance 3 Explain the purpose of an e-mail window MIDlet-Name: ThrowException MIDlet-Version: 10 MIDlet-Vendor: MyCompany MIDlet-Jar-URL: ThrowExceptionjar MIDlet-1: ThrowException, ThrowExceptionpng, ThrowException MicroEdition-Configuration: CLDC-10 MicroEdition-Profile: MIDP-10 MIDlet-JAR-SIZE: 100 word 2013 code 39, birt code 39, upc-a barcode font for word, birt code 128, birt ean 128, birt ean 13 vb.net ean 13 reader Read Barcodes from Images C#/ VB . NET - BC.NetBarcodeReader ...
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NET EAN - 13 Barcode Reader , Reading EAN - 13 barcode images in .NET, C#, VB . NET , ASP.NET applications. The sequencing of put( ) and get( ) calls is handled by two semaphores: semProd and semCon Before put( ) can produce a value, it must acquire a permit from semProd After it has set the value, it releases semCon Before get( ) can consume a value, it must acquire a permit from semCon After it consumes the value, it releases semProd This give and take mechanism ensures that each call to put( ) must be followed by a call to get( ) Notice that semCon is initialized with no available permits This ensures that put( ) executes first The ability to set the initial synchronization state is one of the more powerful aspects of a semaphore vb.net ean 13 reader EAN - 13 VB . NET DLL - KeepAutomation.com
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NET. Free demo download. How to read, scan EAN - 13 linear barcode image in . NET applications ... High-quality barcode reader ; C#, VB . NET sample code ... Sometimes you will want a thread to wait until one or more events have occurred To handle such a situation, the concurrent API supplies CountDownLatch A CountDownLatch is initially created with a count of the number of events that must occur before the latch is released Each time an event happens, the count is decremented When the count reaches zero, the latch opens CountDownLatch has the following constructor: CountDownLatch(int num) Here, num specifies the number of events that must occur in order for the latch to open To wait on the latch, a thread calls await( ), which has the forms shown here: void await( ) throws InterruptedException void await(long wait, TimeUnit tu) throws InterruptedException The first form waits until the count associated with the invoking CountDownLatch reaches zero The second form waits only for the period of time specified by wait The units represented by wait are specified by tu, which is an object the TimeUnit enumeration (TimeUnit is described later in this chapter) To signal an event, call the countDown( ) method, shown next: void countDown( ) Each call to countDown( ) decrements the count associated with the invoking object The following program demonstrates CountDownLatch It creates a latch that requires five events to occur before it opens 4 Analyze What are the primary advantages of interactive buttons on Web pages What are the advantages of text links 5 Synthesize Besides using interactive buttons, how else can a Web designer make a site more user-friendly Listing 5-9 Throwing a MIDletStateChangeException in destroyApp() // An example of CountDownLatch import javautilconcurrentCountDownLatch; class CDLDemo { public static void main(String args[]) { CountDownLatch cdl = new CountDownLatch(5); Systemoutprintln("Starting"); new MyThread(cdl); Apply It! Part II: import javaxmicroeditionmidlet*; import javaxmicroeditionlcdui*; public class ThrowException extends MIDlet implements CommandListener { private Display display; private Form form; private Command exit; private boolean isSafeToQuit; public ThrowException() { isSafeToQuit = false; display = DisplaygetDisplay(this); exit = new Command("Exit", CommandSCREEN, 1); form = new Form("Throw Exception"); formaddCommand(exit); formsetCommandListener(this); } public void startApp() { displaysetCurrent(form); } public void pauseApp() { try { cdlawait(); } catch (InterruptedException exc) { Systemoutprintln(exc); } Systemoutprintln("Done"); } } class MyThread implements Runnable { CountDownLatch latch; MyThread(CountDownLatch c) { latch = c; new Thread(this)start(); } public void run() { for(int i = 0; i<5; i++) { Systemoutprintln(i); latchcountDown(); // decrement count } } } vb.net ean 13 reader VB . NET Image: VB Code to Read and Recognize EAN - 13 Barcode from ...
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