子父类取值问题

package com.demo;

public class Demo5 {

public static void main(String[] args) {
// TODO Auto-generated method stub
Son son = new Son();
son.funcher();
}

}

class Father{
int num1 = 10;
int num2 = 30;
}

class Son extends Father{
int num2=20;
public void funcher(){
int num2=40;
System.out.println(num1);//10
System.out.println(num2);//40就近原则
System.out.println(this.num2);//20 类全局变量
System.out.println(super.num2);//30父类变量
}
}