java重写

public class ClassExtends {
    public static void main(String[] args) {
        Animal w = new Wolf();
        try {
            w.getAge();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

class Animal{
    private String name;
    private int age;
    public Animal(String name){
        System.out.print("Animal 带一个参数的构造函数：动物名字叫："+name+",");
    }
    public Animal(String name,int age){
        this(name);
        System.out.println("今年："+age+"岁了！");
    }
//    private void getAge(){
//        System.out.println("My age is 6!");
//    }
    public Object getAge() throws IOException{
        getAge();
　　　　return null;
    }
}

class Wolf extends Animal{
    public Wolf() {
        super("灰太狼",6);
        System.out.println("Wolf 的无参构造函数!");
    }
　　@Override
    public String getAge()throws Exception{
        System.out.println("My age is "+2);
　　　　 return null;
    }
}