73 lines
1.8 KiB
Java
73 lines
1.8 KiB
Java
Serialize an Object to a File
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import java.util.Vector;
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import java.io.*;
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public class Queue extends Vector {
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/*
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** FIFO, first in first out
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*/
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Queue() {
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super();
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}
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void put(Object o) {
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addElement(o);
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}
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Object get() {
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if (isEmpty()) return null;
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Object o = firstElement();
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removeElement(o);
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return o;
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}
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Object peek() {
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if (isEmpty()) return null;
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return firstElement();
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}
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}
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//To serialize (save the Queue state to a file) :
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public static void main(String args[]) {
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Queue theQueue;
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theQueue = new Queue();
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theQueue.put("element 1");
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theQueue.put("element 2");
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theQueue.put("element 3");
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theQueue.put("element 4");
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System.out.println(theQueue.toString());
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// serialize the Queue
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System.out.println("serializing theQueue");
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try {
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FileOutputStream fout = new FileOutputStream("thequeue.dat");
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ObjectOutputStream oos = new ObjectOutputStream(fout);
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oos.writeObject(theQueue);
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oos.close();
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}
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catch (Exception e) { e.printStackTrace(); }
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}
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//To unserialize (to load a previously saved Queue) :
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public static void main(String args[]) {
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Queue theQueue;
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theQueue = new Queue();
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// unserialize the Queue
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System.out.println("unserializing theQueue");
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try {
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FileInputStream fin = new FileInputStream("thequeue.dat");
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ObjectInputStream ois = new ObjectInputStream(fin);
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theQueue = (Queue) ois.readObject();
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ois.close();
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}
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catch (Exception e) { e.printStackTrace(); }
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System.out.println(theQueue.toString());
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}
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