polytest.java

来自「java课件 java课件 java课件 java课件」· Java 代码 · 共 27 行

class Shape{
 void draw(){
System.out.println("Drawing Shape");
}
}
class Circle extends Shape{
   void draw(){
System.out.println("Drawing Circle");
}
}
class Triangle extends Shape{
  //void draw(){
//System.out.println("Drawing Triangle");
//}
}
public class PolyTest{
  static void doStuff(Shape s){
  	s.draw();
  }
  public static void main(String args[]){
    Circle c = new Circle();
    Shape s = new Triangle();
doStuff(c);
doStuff(s); 
  }
}