jlab0501.java

来自「java教程中的编程实例」· Java 代码 · 共 49 行

class Pet{
   protected String name;
   public Pet(String n){
         name=n;
              }
   public String getName(){
         return name;
         }
   public String move(){
          return "run";
          }
   public String speak(){
          return "";
           }
   public String toString(){
          return "My pet "+name;
           }
}
     class Dog extends Pet{
     protected int weight;
               public Dog(String s){
                   super(s);
                  }
}
    class JLab0501{
          public static void main(String[] args){
               Pet myPet=new Pet("George");
               Dog myDog=new Dog("Spot");
               System.out.println(myPet.toString()+"\n"+"Speak:"+
                                  myPet.speak()+"\n"+myPet.move()+" "+
                                  myPet.getName()+"\n");
               System.out.println(myDog.toString()+"\n"+"Speak:"+
                                  myDog.speak()+"\n"+myDog.move()+" "+
                                  myDog.getName()+"\n");
}
}