I\'m not sure if i\'m doing this right and don\'t know what values do these meth

Question

I'm not sure if i'm doing this right and don't know what values do these methods return so I have placed null there for now so I won't have any errors. I also don't have the enqueue method filled out cause i was unsure what should go there. Please help me fill out the returns and the enqueue method.

public class ObjectQueue extends LinkedList implements Queue
{
private int size;

public int size()
{
return size;
}

public boolean isEmpty()
{
return false;
}

public Object front() throws EmptyQueueException
{
if(isEmpty())
{
throw new EmptyQueueException("Queue is empty!");
}
return null;
}

public Object dequeue() throws EmptyQueueException
{
if(isEmpty())
{
throw new EmptyQueueException("Queue is empty!");
}
return null;
}

public void enqueue(Object item)
{

}


}

Explanation / Answer

PS: Please rate the answer You are having couple of errors. If you try to use this queue in multi-threaded program, you will have race conditions. Here is a correct implementation which works for single threaded and multi threaded. If you dont want multithreaded, just use the enqueue and dequeue functions without using synchronized keyword. import java.util.*; public class ObjectQueue implements Queue { Object data; LinkedList queues[]; int mx; int nq; public synchronized void setData(Object o) { data = o; } public synchronized Object getData() { return data; } public ObjectQueue(int _nq, int _mx) { nq = _nq; mx = _mx; queues = new LinkedList[nq]; for (int n = 0; n

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