The Fourth Dimension Space

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JAVA學習筆記

package hw2;

abstract class Book

{

String title;

String author;

float price;

int cat, subCat;

public Book (String t, String a, int c1, int c2, float p)

{

title = t;

author = a;

price = p;

cat = c1;

subCat = c2;

}

public String details ()

{

return title+", "+author+" Category "+cat+"."+subCat+" value $"+price;

}

public String toString()

{

return "Title <"+title+"> Author <"+author+"> cat:"+cat+" subCat:"+subCat+" price:"+price;

}

package hw2;

public class Library

{

public static void main(String[] args)

{

// Book b1 = new Book ("Java I/O Programming","E.R.Harrold",123,45,18.99F);

// Book b2 = new Book ("Java in a Nutshell","D.Flanagan",123,25,12.99F);

// System.out.println(b1.details());

// System.out.println(b2.details());

Person james = new Person ("James Gosling",new Membership(Membership.OAP));

Video v = new Video("Bat Man");

System.out.println(james.canBorrow(v));

// System.out.println(james.canBorrow());

//Loan l1 = new Loan(b1,james);

//System.out.println(l1.details());

/*

LoanableBook b3 = new LoanableBook ("Java I/O Programming","E.R.Harrold",123,45,18.99F);

ReferenceBook b4 = new ReferenceBook ("Java in a Nutshell","D.Flanagan",123,25,12.99F);

System.out.println(b3.details());

System.out.println(b4.details());

Person p1 = new Person("Mike", new Membership(Membership.JUNIOR));

System.out.println(p1.details());

*/

//LoanableBook b3 = new LoanableBook ("Java I/O Programming","E.R.Harrold",123,45,18.99F);

// System.out.println(b3.canLoan());

// ReferenceBook b4 = new ReferenceBook ("Java in a Nutshell","D.Flanagan",123,25,12.99F);

// System.out.println(b4.canLoan());

}

package hw2;

import java.util.Date;

class Loan

{

Book book;

Person person;

Date date = new Date();

public Loan (Book b, Person p)

{

book = b;

person = p;

p.borrow(b);

}

public String details ()

{

return book.details()+" loaned on "+date+" to "+person.details();

}

public String toString()

{

return "book "+book+" -> person"+person+" @date "+date;

}

package hw2;

public interface Loanable {

public boolean canLoan();

}

package hw2;

public class LoanableBook extends Book implements Loanable

{

public LoanableBook(String t, String a, int c1, int c2, float p)

{

super(t, a, c1, c2, p);

}

public boolean canLoan()

{

return true;

}

public String details ()

{

return "canLoan: " + canLoan() + " " + super.details();

}

package hw2;

public class Membership {

int mShip;

int nBook;

public final static int JUNIOR =1;

/* 綠燈 */

public final static int STANDARD =2;

/* 黃燈 */

public final static int OAP =3;

public Membership(int mShip)

{

this.mShip = mShip;

if(mShip == Membership.STANDARD)

nBook = 1;

else if(mShip == Membership.JUNIOR)

nBook = 6;

else

nBook = Integer.MAX_VALUE;

}

public String toString()

{

if(mShip == 1) return "JUNIOR";

if(mShip == 2) return "STANDARD";

else return "OAP";

}

public int getCap()

{

return nBook;

}

package hw2;

import java.util.ArrayList;

import java.util.Calendar;

import java.util.List;

class Person

{

String name;

Membership mShip;

List<Book> books = new ArrayList<Book>();

List<Video> videos = new ArrayList<Video>();

public void borrow(Book b)

{

books.add(b);

}

public void borrow(Video v)

{

videos.add(v);

}

public boolean canBorrow(Book b)

{

Calendar cal = Calendar.getInstance();

int week = cal.get(Calendar.DAY_OF_WEEK)-1;

if(week==2)//設置為星期二不能借書(寫程序當日)

return false;

if(books.size()<mShip.getCap())

return true;

else

return false;

}

public boolean canBorrow(Video v)

{

if(mShip.mShip == Membership.JUNIOR)

return false;

if(videos.size()==0) return true;

else return false;

}

public Person (String n, Membership m)

{

name = n;

mShip = m;

}

public String details ()

{

return name +" " + mShip;

}

public String toString()

{

return "name <"+name+">" + " " + mShip;

}

package hw2;

public class ReferenceBook extends Book

{

public ReferenceBook(String t, String a, int c1, int c2, float p)

{

super(t, a, c1, c2, p);

}

public boolean canLoan()

{

return false;

}

public String details()

{

return "canLoan: " + canLoan() + " " + super.details();

}

package hw2;

public class Video {

String name;

public Video(String n)

{

name = n;

}

public String toString()

{

return name;

}

posted on 2014-09-16 18:22 abilitytao 閱讀(279) 評論(0) 編輯收藏引用

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The Fourth Dimension Space

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JAVA學習筆記