Quicksort algorithm displaying strange behaviour

Code :

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public void quickSort(int[] items, int left, int right){
		System.out.println(count);
		count++;
		int pivot = (left + right) / 2;
		int tmp;
		int i = left, j = right;
		while(items[i] <= items[pivot] && items[j] >= items[pivot]){
			while(items[i] < items[j]){
				i++;
				j--;
			}
 
			tmp = items[i];
			items[i] = items[j];
			items[j] = tmp;
		}
 
		if((left + pivot) > 1){
		quickSort(items, left, pivot);
		}
 
		if((right + pivot) > 1){
		quickSort(items, pivot, right);
		}
	}

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I have set up a counter to count how many times this method recurses. It gets to 4 and then nothing happens - the program doesn't exit but nothing else is printed and it doesn't finish sorting.