@Override
	public void checkOut(String borrower, String date) {
		if(state == 0){
		this.borrower =borrower;
		this.checkOutDate = date;
		this.state =1;
		System.out.println("*"+bookTitle+"() Ǿϴ.");
		System.out.println(":"+ this.borrower);
		System.out.println(":"+ this.checkOutDate);
		
		
		} 
		else {
			System.out.println(" Ұ մϴ.");
		}
		
	}