Java一个很基础的面试题【求助】

Question

 public class Apple extends Fruit  {
    private String name = "apple";
    public Apple () {
        tellName();
        printName();
    }
    public void tellName() {
        System.out.println("Apple tell name: " + name);
    }
    public void printName() {
        System.out.println("Apple print name: " + name);
    }
    public static void main(String[] args){
        new Apple();    
    }
}
class Fruit {
    private String name = "fruit";
    public Fruit () {
        tellName();
        printName();
    }
    public void tellName() {
        System.out.println("fruit tell name: " + name);
    }
    public void printName() {
        System.out.println("fruit print name: " + name);
    }
}

我想知道为什么会输出4行
以及什么原因
感谢各位

Answer 1

1.先走第三行代码进tellName()方法。打印输出 Apple tell name: null
2.进入Class Fruit 进入public Fruit()方法中的tellName
3.再走第三行代码进printName()方法。打印输出 Apple print name: null
4.进入Class Fruit 进入public Fruit()方法中的printName
5.走第二行代码 给name赋值apple
6.重复走1-打印输出 Apple tell name: apple -2-3 -打印输出 Apple print name:apple