visual basic 6.0 barcode generator The Art of Java in Java

Draw PDF417 in Java The Art of Java

The Art of Java
PDF417 Reader In Java
Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications.
Printing PDF417 In Java
Using Barcode drawer for Java Control to generate, create PDF 417 image in Java applications.
// Switch search button back to "Search." searchButton.setText("Search"); // Return to default cursor. setCursor(Cursor.getDefaultCursor());
Recognize PDF417 In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
Bar Code Creation In Java
Using Barcode maker for Java Control to generate, create bar code image in Java applications.
First, the Crawling field is updated to display Done. Second, each of the search controls is reenabled. Third, the Stop button is reverted back to displaying Search. Finally, the cursor is reverted back to the default application cursor. If the search did not yield any matches, the following code displays a dialog box to indicate this fact:
Bar Code Reader In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
PDF-417 2d Barcode Creation In Visual C#
Using Barcode maker for VS .NET Control to generate, create PDF-417 2d barcode image in VS .NET applications.
// Show message if search string not found. if (table.getRowCount() == 0) { JOptionPane.showMessageDialog(SearchCrawler.this, "Your Search String was not found. Please try another.", "Search String Not Found", JOptionPane.WARNING_MESSAGE); }
Creating PDF 417 In .NET
Using Barcode creator for ASP.NET Control to generate, create PDF417 image in ASP.NET applications.
PDF417 Encoder In .NET
Using Barcode generator for .NET Control to generate, create PDF417 image in .NET framework applications.
The search( ) method wraps up with the following lines of code:
PDF417 Creation In Visual Basic .NET
Using Barcode drawer for .NET framework Control to generate, create PDF-417 2d barcode image in Visual Studio .NET applications.
EAN 128 Generator In Java
Using Barcode generation for Java Control to generate, create USS-128 image in Java applications.
} }); thread.start();
Generating UCC - 12 In Java
Using Barcode drawer for Java Control to generate, create EAN 128 image in Java applications.
Bar Code Printer In Java
Using Barcode creation for Java Control to generate, create barcode image in Java applications.
After the Runnable implementation s run( ) method has been defined, the search thread is started with a call to thread.start( ). Upon the thread s execution, the Runnable instance s run( ) method will be invoked.
Printing USD - 8 In Java
Using Barcode generator for Java Control to generate, create Code11 image in Java applications.
Printing Code 128A In Objective-C
Using Barcode encoder for iPad Control to generate, create Code 128 Code Set B image in iPad applications.
The showError( ) Method
Barcode Generation In None
Using Barcode drawer for Word Control to generate, create barcode image in Word applications.
Bar Code Generation In None
Using Barcode creation for Font Control to generate, create barcode image in Font applications.
The showError( ) method, shown here, displays an error dialog box on the screen with the given message. This method is invoked if any required search options are missing or if there are any problems opening, writing to, or closing the log file.
Scan Code39 In C#
Using Barcode scanner for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
EAN 128 Creator In None
Using Barcode generation for Microsoft Word Control to generate, create EAN 128 image in Microsoft Word applications.
// Show dialog box with error message. private void showError(String message) { JOptionPane.showMessageDialog(this, message, "Error", JOptionPane.ERROR_MESSAGE); }
Print EAN-13 In Java
Using Barcode drawer for Android Control to generate, create GS1 - 13 image in Android applications.
Data Matrix Decoder In C#
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in .NET applications.
The updateStats( ) Method
The updateStats( ) method, shown here, updates the values displayed in the Stats section of the interface:
6: Crawling the Web with Java
// Update crawling stats. private void updateStats( String crawling, int crawled, int toCrawl, int maxUrls) { crawlingLabel2.setText(crawling); crawledLabel2.setText("" + crawled); toCrawlLabel2.setText("" + toCrawl); // Update progress bar. if (maxUrls == -1) { progressBar.setMaximum(crawled + toCrawl); } else { progressBar.setMaximum(maxUrls); } progressBar.setValue(crawled); matchesLabel2.setText("" + table.getRowCount()); }
First, the crawling results are updated to reflect the current URL being crawled, the number of URLs crawled thus far, and the number of URLs that are left to crawl. Take note that the URLs to Crawl field may be misleading. It displays the number of links that have been aggregated and put in the To Crawl queue, not the difference between the specified maximum URLs and the number of URLs that have been crawled thus far. Notice also that when setText( ) is called with crawled and toCrawl, it is passed an empty string (" ") plus an int value. This is so that Java will convert the int values into String objects, which the setText( ) method requires. Next, the progress bar is updated to reflect the current progress made toward finishing crawling. If the Max URLs to Crawl text field was left blank, which specifies that crawling should not be capped, the maxUrls variable will have the value 1. In this case, the progress bar s maximum is set to the number of URLs that have been crawled plus the number of URLs left to crawl. If, on the other hand, a Max URLs to Crawl value was specified, it will be used as the progress bar s maximum. After establishing the progress bar s maximum value, its current value is set. The JProgressBar class uses the maximum and current values to calculate the percentage shown in text on the progress bar. Finally, the Search Matches label is updated to reflect the current number of URLs that contain the specified search string.
The addMatch( ) Method
The addMatch( ) method is called by the crawl( ) method each time a match with the search string is found. The addMatch( ) method, shown here, adds a URL to both the matches table and the log file:
// Add match to matches table and log file. private void addMatch(String url) {
The Art Of Java
// Add URL to matches table. DefaultTableModel model = (DefaultTableModel) table.getModel(); model.addRow(new Object[]{url}); // Add URL to matches log file. try { logFileWriter.println(url); } catch (Exception e) { showError("Unable to log match."); } }
This method first adds the URL to the matches table by retrieving the table s data model and calling its addRow( ) method. Notice that the addRow( ) method takes an Object array as input. In order to satisfy that requirement, the url String object is wrapped in an Object array. After adding the URL to the matches table, the URL is written to the log file with a call to logFileWriter.println( ). This call is wrapped in a try-catch block; and if an exception is thrown, the showError( ) method is called to alert the user that an error has occurred while trying to write to the log file.
Copyright © OnBarcode.com . All rights reserved.