necessary, and readers are advised not to create subclasses in Java

Encoding Code 3 of 9 in Java necessary, and readers are advised not to create subclasses
necessary, and readers are advised not to create subclasses
Create Code-39 In Java
Using Barcode creator for Java Control to generate, create Code 3 of 9 image in Java applications.
ObjectOutputStream (OutputStream output) throws javaio IOException creates an object output stream capable of serializing objects to the
Make Barcode In Java
Using Barcode drawer for Java Control to generate, create bar code image in Java applications.
specified output stream
Barcode Decoder In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
Methods Like the ObjectInputStream class, ObjectOutputStream offers extra methods that may be used by subclasses to implement object serialization However, this is a complex task and is rarely done For this reason, only the most important method, used for writing objects, is covered here for further in formation, the Java API documentation should be consulted Readers are reminded that the ObjectOutputStream class also provides method implementations for the DataOutput interface these methods are covered in Section 4332 on DataOutputStream, and may be used to write primitive data types to a stream
Printing Code 3 Of 9 In C#
Using Barcode encoder for VS .NET Control to generate, create Code39 image in .NET applications.
void writeObject (Object object) throws javaioIOException javaioInvalidClassException, javaioNotSerializableException writes the specified object to the output
Generate Code39 In .NET
Using Barcode generator for ASP.NET Control to generate, create Code 39 Extended image in ASP.NET applications.
stream, through object serialization All variables that are not marked as transient or
Code39 Drawer In Visual Studio .NET
Using Barcode maker for .NET Control to generate, create USS Code 39 image in VS .NET applications.
static will be written, providing the specified class is an instance of the javaioSerializable interface
Code 39 Full ASCII Printer In Visual Basic .NET
Using Barcode drawer for VS .NET Control to generate, create Code 39 Full ASCII image in VS .NET applications.
4543 Serialization Example Let's look at an example of an application that can save and restore state information by using the Java serialization classes Code for SerializationDemo
Generating EAN128 In Java
Using Barcode generator for Java Control to generate, create USS-128 image in Java applications.
import javaio*; import javautil*; // 4, Listing 5 public class SerializationDemo { public static void main(String args[]) { try { Vector list; // Create a buffered reader for easy input BufferedReader reader = new BufferedReader ( new InputStreamReader ( Systemin ) ); Systemoutprintln ("Checking for previous serialized list"); // Check to see if serialized list exists try { FileInputStream fin = new FileInputStream ("listout"); // Connect an object input stream to the // list ObjectInputStream oin = new ObjectInputStream ( fin ); try
Printing Barcode In Java
Using Barcode printer for Java Control to generate, create barcode image in Java applications.
{ // Read the vector back from the list Object obj = oinreadObject(); // Cast back to a vector list = (Vector) obj; } catch (ClassCastException cce) { // Can't read it, create a blank one list = new Vector(); } catch (ClassNotFoundException cnfe) { // Can't read it, create a blank one list = new Vector(); } finclose(); } catch (FileNotFoundException fnfe) { // Create a blank vector list = new Vector(); } // Repeat indefinitely for (;;) { // Now, display menu Systemoutprintln ("Menu :-"); Systemoutprintln ("1 Add item"); Systemoutprintln ("2 Delete item"); Systemoutprintln ("3 List items"); Systemoutprintln ("4 Save and quit"); Systemoutprint ("Choice : "); // Read choice String response = readerreadLine(); // Convert to an int int choice = IntegerparseInt (response); switch (choice) { case 1 : // Add the item to list Systemoutprint ("Enter item : "); String item = readerreadLine(); listaddElement(item); break; case 2 : // Delete the item from list Systemoutprint ("Enter item : "); String deadItem = readerreadLine(); listremoveElement(deadItem); break;
Generate EAN 13 In Java
Using Barcode printer for Java Control to generate, create EAN-13 image in Java applications.
case 3 : // List the elements of the list for (Enumeration e = listelements(); ehasMoreElements();) { Systemoutprintln (enextElement()); } break; case 4 : // Save list and terminate Systemoutprintln ("Saving list"); FileOutputStream fout = new FileOutputStream ( "listout" ); // Construct an object output stream ObjectOutputStream oout = new ObjectOutputStream ( fout ); // Write the object to the stream ooutwriteObject (list); foutclose(); Systemexit(0); } } } catch (IOException ioe) { Systemerrprintln ("I/O error"); } } }
Barcode Generation In Java
Using Barcode maker for Java Control to generate, create bar code image in Java applications.
How SerializationDemo Works This example is longer than other I/O programs from this chapter, as it presents a text-based user interface that allows items to be added to, or removed from, a javautilVector list Such code is fairly simple, but what is not so easy to understand is the serialization process The main difference between this example and other programs is that the list doesn't die when the application terminates it is serialized to a FileOutputStream for later access
Painting Code 128 Code Set B In Java
Using Barcode creation for Java Control to generate, create Code 128 image in Java applications.
// Save list and terminate Systemoutprintln ("Saving list"); FileOutputStream fout = new FileOutputStream ( "listout" ); // Construct an object output stream ObjectOutputStream oout = new ObjectOutputStream ( fout ); // Write the object to the stream ooutwriteObject (list); foutclose(); Systemexit(0);
Code 2 Of 7 Generator In Java
Using Barcode generator for Java Control to generate, create Rationalized Codabar image in Java applications.
When the application first starts, it checks to see whether the serialized file exists If so, the vector list is read back from the file, along with any object references by the vector list, by using an ObjectInputStream connected to a FileInputStream The
Bar Code Creator In VS .NET
Using Barcode generation for VS .NET Control to generate, create bar code image in VS .NET applications.
ObjectInputStreamreadObject() method returns an Object instance, and must be cast back to the original form of a Vector Just in case the object wasn't an actual vector (for example, if another application had modified the file), a ClassCastException is caught FileInputStream fin = new FileInputStream ("listout"); // Connect an object input stream to the list ObjectInputStream oin = new ObjectInputStream ( fin ); try { // Read the vector back from the list Object obj = oinreadObject(); // Cast back to a vector list = (Vector) obj; } catch (ClassCastException cce) { // Can't read it, create a blank one list = new Vector(); } catch (ClassNotFoundException cnfe) { // Can't read it, create a blank one list = new Vector(); }
Barcode Creator In Visual Studio .NET
Using Barcode generation for Visual Studio .NET Control to generate, create bar code image in .NET applications.
Running SerializationDemo This example demonstrates the use of serialization to save program state You can follow the menu prompts to add data, and then exit the program Run the program a second time, and you'll notice that it "remembers" the original state of the list Deleting the file listout will erase the program's memory again To run the example, the following command would be executed:
GTIN - 13 Generator In Visual Studio .NET
Using Barcode generation for VS .NET Control to generate, create UPC - 13 image in .NET framework applications.
Barcode Generation In .NET Framework
Using Barcode drawer for VS .NET Control to generate, create bar code image in Visual Studio .NET applications.
Draw ANSI/AIM Code 39 In Visual Basic .NET
Using Barcode generation for Visual Studio .NET Control to generate, create Code-39 image in VS .NET applications.