java教師類

ID:408941 · 發(fā)表于 2018-10-13 11:22

package zuoye;

public class Book {
      public static void main(String[] args) {
            book1 book=new book1();
            book.setTitle("java");
            book.setPageNum(210);
            System.out.println(book.detall());
      }
}
      class book1 {
      private String title;
      private int pageNum;
      public int getPageNum() {
            return pageNum;
      }
      public void setPageNum(int pageNum) {
            if(pageNum<200) {
                     System.out.println("頁數(shù)不能少于200頁！");
                     this.pageNum=pageNum;
            }else
                     this.pageNum=pageNum;
      }
      public String getTitle() {
            return title;
      }
      public void setTitle(String title) {
            this.title=title;
      }
      String detall() {
            return "書名："+title+",頁數(shù)："+pageNum;
      }

      }

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java教師類