【JAVA面向对象编程】--- 探索子类如何继承父类

package Inherit;
class Animal {
      public String name;
      public int age;
      public void eat() {
          System.out.println(name+" 正在吃饭！");
      }
}
  class Dog extends Animal{
      public int count;
      public void wangwang() {
        System.out.println(name+"正在叫！");
      }
  }
  class Cat extends Animal{
      public void miaomiao() {
          System.out.println(name+ "正在苗苗叫！");
      }
  }
  public class Test3 {
      public static void main(String[] args) {
          Dog dog = new Dog();
          dog.name = "坦克";
          dog.eat();
          dog.wangwang();
          Cat cat = new Cat();
          cat.name = "小咪";
          cat.eat();
          cat.miaomiao();
      }
  }

package Inherit;
class Ani {
  public String name;
  public int age;
  public void eat(){
    System.out.println(name + "吃饭!");
  } 
}
class HotDog extends Ani{
  //傻狗 是狗的属性
  public String silly; 
  public String name = "hello";
  public void houseGuard() {
    System.out.println(super.name+"正在看家护院!");
  }
}
//1.this 会优先访问子类自己的,若子类无 ,才会访问父类的.
//2.super 只是一个关键字,在代码层面上,能够达到易读效果,可以用来访问父类的内容及地址但是不能说成`是`引用
class Miao extends Ani{
  public void catchMouse(String name) {
    System.out.println(name + "抓杰瑞!");
  }
@Override
  public String toString() {
    return "miao 抓老鼠";
  }
  public Miao() {
    System.out.println(name + "抓老鼠!");
  }
  public Miao(String name) {
    this.name = name;
    System.out.println(name + "抓老鼠!");
  }
}
public class Test2{
  public static void main(String[] args) {
  Miao miao = new Miao();
  Miao miao1 = new Miao("喵喵");
  new Miao("Tom"). catchMouse("🐱");
  HotDog hotdog = new HotDog();
  System.out.println(hotdog);
  }
}

package Inherit;
class Animal {
      public String name;
      public int age;
//      public Animal() {
//        
//      }
      //父类调用含参的构造方法--->
      //报错信息：Implicit super constructor Animal()
      //is undefined for default constructor. 
      //Must define an explicit constructor
      public Animal(String name , int age) {
        this.name = name;
        this.age = age;
        System.out.println("Animal(String,int)");
      }
      public void eat() {
          System.out.println(name+" 正在吃饭！");
      }
      public static void staticFunc() {
      }
}
  class Dog extends Animal{
      public int count;
      public void wangwang() {
        System.out.println(this.name+"正在叫！");
        //super.eat();--->利用super调用父类方法
        staticFunc();
      }
      public Dog(String name , int age,int count) {
        //1.先帮助父类部分初始化  必须放到第一行
        super(name,age);
        //2.再初始化自己
        this.count = count; 
        System.out.println("Dog(String,int,int)");
      }
  }
  class Cat extends Animal{
    public Cat() {
      super("mmi", 10);
    }
    public Cat(String name,int age) {
      super(name,age);
    }
    public void miaomiao() {
          System.out.println(name+ "正在苗苗叫！");
      }
  }
  public class Test3 {
      public static void main(String[] args) {
          Dog dog = new Dog("hello",10,3);
          dog.wangwang();
  }