public void setField() {
			if (currentInput.equals("0") && !operating) {
				currentInput = "";
				currentInput += number;
				returnField.setText(currentInput);
			}
			else if (!currentInput.equals("0") && !operating) {
				currentInput += number;
				returnField.setText(currentInput);
			}
			else if (operating && tracker == 0) {
				currentInput = "" + number;
				returnField.setText(currentInput);
				tracker++;
				newInput = true;
			}
			else if (operating && tracker > 0) {
				currentInput += number;
				returnField.setText(currentInput);
			}
		}