練習在子類別中添加新的特性,並在子類別中覆寫(override)自父類別繼承下來的方法。- public class Ch70 {
- public static void main(String[] args) {
- Dog d1=new Dog("憨憨",2,1.28,"棕色");
- Dog d2=new Dog("球球",1,1.35,"白色");
- Cat c1=new Cat("咪咪",3,0.95);
-
- d1.showProfile();
- d1.makeSound(2);
- d2.showProfile();
- d2.makeSound(3);
- c1.showProfile();
- c1.makeSound(5);
- }
- }
- class Animal
- {
- String name;
- int age;
- double weight;
-
- Animal(String n,int a,double w)
- {
- name=n;
- age=a;
- weight=w;
- }
-
- void showProfile()
- {
- System.out.println(name+"今年"+age+"歲,體重"+weight+"公斤.");
- }
- }
- class Dog extends Animal
- {
- String color;
- Dog(String n,int a,double w,String c)
- {
- super(n,a,w);
- color=c;
- }
-
- void makeSound(int x)
- {
- for(int i=1; i<=x; i++)
- System.out.print("汪~");
- System.out.println();
- }
-
- void showProfile()
- {
- System.out.println(name+"今年"+age+"歲,體重"+weight+"公斤,毛色為"+color+".");
- }
- }
- class Cat extends Animal
- {
- Cat(String n,int a,double w)
- {
- super(n,a,w);
- }
-
- void makeSound(int x)
- {
- for(int i=1; i<=x; i++)
- System.out.print("喵~");
- System.out.println();
- }
- }
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