polytester.java

Java程序设计技巧与开发实例附书源代码。

public class PolyTester
{
   public static void main(String args[])
   {
      SuperClass array[] = new SuperClass[2];
      array[0] = new SubClassA();
      array[1] = new SubClassB();
      for (int i = 0; i < array.length; i++)
      {
         array[i].display();
      }
   }
}