readingmaterial.java

来自「北京大学出版社的」· Java 代码 · 共 12 行

package questions.c5;
abstract class ReadingMaterial {
   private String title;
   public String getTitle() {
      return title;
   }
   public void setTitle( String t ) {
      title = t;
   }
   public abstract Object getContents();
   public abstract void setContents( Object contents );
}