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NonSerialSuperExample.javaAPI DocExample2643Wed Apr 19 11:21:20 BST 2000None

NonSerialSuperExample

public class NonSerialSuperExample extends Object
This example shows how to serialize a subclass whose superclass is not serializable. When a superclass of a particular is not serializable, the subclass is responsible for saving the state of its supertype (in its writeObject) Compiled and Tested on JDK1.1 & JDK1.2 How to run this example: Compile this file: javac NonSerialSuperExample.java Then run: java NonSerialSuperExample This will print out a book object before and after serialization.

Fields Summary
Constructors Summary
Methods Summary
public static voidmain(java.lang.String[] args)
Creates a book object, serializes it, deserializes it and then prints out to test that the serialization did work.


	// create a Book object 
	Book bookorg = new Book(100, "How to Serialize", true, "R.R", "Serialization", 1997);
	Book booknew = null;
	
	// serialize the Book
	try {
	    FileOutputStream fo = new FileOutputStream("tmp");
	    ObjectOutputStream so = new ObjectOutputStream(fo);
	    so.writeObject(bookorg);
	    so.flush();
	} catch (Exception e) {
	    System.out.println(e);
	    System.exit(1);
	}
	
	// deserialize the Book
	try {
	    FileInputStream fi = new FileInputStream("tmp");
	    ObjectInputStream si = new ObjectInputStream(fi);  
	    booknew = (Book) si.readObject();
	}catch (Exception e) {
	    System.out.println(e);
	    System.exit(1);
	}
	
    // The books should be the same if we did everything correctly!
	System.out.println();
	System.out.println("Printing original book...");
	System.out.println(bookorg);
	System.out.println("Printing new book... ");
	System.out.println(booknew);
	System.out.println("The original and new should be the same!");
	System.out.println();