Queue.java

class Queue
{
private final int SIZE = 8;
private int[] queArray;
private int front;
private int rear;
//-------------------------------------------------------------
public Queue()            // constructor
   {
   queArray = new int[SIZE];
   front = 0;
   rear = -1;
   }
//-------------------------------------------------------------
public void insert(int j) // put item at rear of queue
   {
   if(rear == SIZE-1)
      rear = -1;
   queArray[++rear] = j;
   }
//-------------------------------------------------------------
public int remove()       // take item from front of queue
   {
   int temp = queArray[front++];
   if(front == SIZE)
      front = 0;
   return temp;
   }
//-------------------------------------------------------------
public boolean isEmpty()  // true if queue is empty
   {
   return ( rear+1==front || (front+SIZE-1==rear) );
   }
//-------------------------------------------------------------
}  // end class Queue