Vector manipulation for the Thread Class

Question

Hello everyone,
Trying to create a producer consumer class
Please help with consumer method.
Here is my code:
// Class
import java.util.*;
public class ProducerConsumer
     // A private Vector field.
      Vector vector = new Vector();     
           Object element;
     // A flag to indicate completion.
     private boolean produceFlag=false;
     // A method setDone() to indicate completion.
     public void setDone()
          produceFlag=true;
     // A method isDone()  to check completion.
      public boolean isDone()
           if (produceFlag)
                return false;
           else
                return true;
          // A produce() method  - The produce method checks if the vector is empty.
          // If it is, it will get a random number 'x' between 1 and 10.
          // The produce method then gets 'x' number of random numbers between 20 and 30,
          // displays the number on your screen and inserts them into the vector and notify
          // other threads that it is done. If the vector, is not empty then the produce method
          // just waits. You can use the following formula
          // to get random numbers between a range:
     public  synchronized void produce()
     try
          if (vector.isEmpty())                
               int range =1;
               range = (int) (Math.random() * 10);                
               System.out.println("hello" + range);
               for(int i=0;i<range;i++)
                    // convert int to Integer Object.
                    Integer I=new Integer((int) ( ( i - i + 1) * Math.random() + i ));                    
                    vector.addElement(I);                                                            
               //loop thought the elements in a vector to print
               for (int j=0; j < vector.size(); j++)
                    // set reference to each element inside the vector as Object.               
                    element=vector.elementAt(j);
                    /* cast the object variable to Integer.
                    ** call intValue() method of Integer
                    ** object that returns the int
                    ** inside an Integer Object.
                    // print the int just extracted.
                    System.out.println("Integer Found: " + ((Integer) element).intValue());
                    notifyAll();
                    setDone() ;
               else
                    // Vector is not empty - it waits
                    wait();
                    System.out.println("i am not empty");                    
          }          // exception throws by wait().
          catch (InterruptedException e)
               System.out.println(e.toString());
     // A consume method - The consume() method checks
     // if the vector is empty.
     // If it is, it checks if the producer is done.
     // If it is - the program exits.
     // If the producer is not done the consumer just waits. 
     // If the vector is not empty, the consume method
     // retrieves at most three items in FIFO
     // (First In First Out)
     // order from the vector, displays the numbers on your screen
     // and
     //  removes them from the vector.
     // If there are less then three items -
     // the consumer consumes all. If there are more than or
     // equal to three items, the
     // consumer consumes three items.
      public  synchronized void consume()
          try
               if (vector.isEmpty())
                 if (isDone() )
                                System.out.println("Done");
                                System.exit(0);
                      else
                                System.out.println("wait");
                                wait();
               else
                    // Consume retrives at most three items (1in,out)
                    // from vector, display the number on the screen
                    // removes from items from vector
                    // if less then 3 delete them all
                    for (int j=0; j < vector.size(); j++)
                         System.out.println("Integer Found: " + ((Integer) element).intValue());
                         vector.removeElementAt(j);      
          catch (InterruptedException e)
               System.out.println(e.toString());
// exception throws by wait().
}THANKS A LOT FOR YOUR HELP:)

Answer 1

How do I implement the logic to retrieves at most
three items in (First In First Out) and removes them
from the vector.
If there are less then three items - the consumer
consumes all. If there are more than or equal to
three items, the consumer consumes three items.You start by looking at the javadocs for Vector to determine which methods on it might help you....
http://java.sun.com/j2se/1.4.2/docs/api/java/util/Vector.html