关于Java中子类调用父类方法

Posted 2022-04-25 xiaoliu66007

当一个类继承于另一个类，当调用方法时，优先在子类中查找，再才是从父类。

class A 
    int x = 6;
    private int y = 2;

    public A(int a) 
        x = a;
    
    int getz() 
        int z;
        z = x / y;
        return z;
    
    void show() 
        System.out.println("x=" + x);
        System.out.println("y=" + y);
        System.out.println("z=" + getz());
    


class B extends A 
    int x = 3, y = 5, z;
    public B(int a) 
        super(a);
    
    int getz() 
        z = x + y;
        return z;
    


public class Temp 
    public static void main(String[] args) 
        A num1 = new A(10);
        B num2 = new B(9);
        num1.show();
        num2.show();