ibooklend.java

Java面向对象编程(随书配套源代码) 阐述了面向对象编程的思想

package chapter7.book.booklend;
public interface IBooklend 
{
    int BOOKSTAT_SUBSCRIBE =1;
    int BOOKSTAT_LEND =2;
    int BOOKSTAT_RETURN =3;
    
	//检查读者是否可以借这本书
	public boolean checkLend();
	//检查读者是否可以预订这本书
	public boolean checkSubscribe();
    //	借书登记
	public boolean lend();
	//还书登记
	public boolean returnBook();
	//订阅登记
	public abstract boolean subscribe();
	//续借登记
	public boolean continueLend();
}