?? mybook.java~4~
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package mediasystem.media;import java.util.Date;public class MyBook extends MyMedia { private Date publishDate; private String bookISBN; public String getPublishDate(){ String year = publishDate.getYear()%100 + ""; String month = publishDate.getMonth() + ""; String day = publishDate.getDay() + ""; return year+month+day; } public void setPublishDate(Date publishDate){ this.publishDate = publishDate; } public String getBookISBN(){ return bookISBN; } public void setBookISBN(String bookISBN){ this.bookISBN = bookISBN; }}?? 快捷鍵說明
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