GenQDemo

public class GenQDemo {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Integer iStore[] = new Integer[10];
		GenQueue<Integer> q = new GenQueue<Integer>(iStore);
		
		Integer iVal;
		
		System.out.println("Demostrate a queue of Integers.");
		try {
			for(int i=0; i<5; i++) {
				System.out.println("Adding "+ i +" to q.");
				q.put(i);
			}
		}catch(QueueFullException e) {
			System.out.println(e);
		}
		System.out.println();
		
		try {
			for(int i=0; i<5; i++) {
				System.out.println("Getting next Integer from q: ");
				iVal = q.get();
				System.out.println(iVal);
			}
		} catch (QueueEmptyException e) {
			// TODO: handle exception
			System.out.println(e);
		}
		System.out.println();
		
		Double dStore[] = new Double[10];
		GenQueue<Double> q2 = new GenQueue<Double>(dStore);
		Double dVal;
		
		System.out.println("Demeonstrate a queue of Doubles.");
		try {
			for(int i=0; i<5; i++) {
				System.out.println("Adding "+ (double)i/2 + " to q2.");
				q2.put((double)i/2);
			}
		} catch (QueueFullException e) {
			// TODO: handle exception
			System.out.println(e);
		}
		System.out.println();
		
		try {
			for(int i=0; i<5; i++) {
				System.out.print("Getting next Double from q2 ");
				dVal = q2.get();
				System.out.println(dVal);
			}
		}catch(QueueEmptyException e) {
			System.out.println(e);
		}

	}

}

GenQueue

class GenQueue<T> implements IGENQ<T> {
	private T q[];
	private int putloc, getloc;
	
	public GenQueue(T[] aRef) {
		q = aRef;
		putloc = getloc = 0;
	}
	
	public void put(T obj) throws QueueFullException{
		if(putloc == q.length)
			throw new QueueFullException(q.length);
		q[putloc++] = obj;
	}
	
	public T get() throws QueueEmptyException{
		if(getloc == putloc)
			throw new QueueEmptyException();
		return q[getloc++];
	}

}

IGENQ

public interface IGENQ<T> {
	void put(T ch) throws QueueFullException;
	T get() throws QueueEmptyException;
}

QueueEmptyException

public class QueueEmptyException extends Exception {
    public String toString() {
    	    return "\nQueue is empty";
    }
}

QueueFullException

public class QueueFullException extends Exception {
    int size;
    public QueueFullException(int s) {
    	    size = s;
		// TODO Auto-generated constructor stub
	}
    public String toString() {
    	    return "\nQueue is full. Maximum size is " + size;
    }
}