java中的继承

package java151218;

public class ExtendsDemo {

public static void main(String[] args) {

Zi zi = new Zi();

zi.show();

}

}

class Fu {

int num = 4;

public int getNum() {

return num;

}

public void setNum(int num) {

this.num = num;

}

void show() {

System.out.println("Fu show");

}

}

class Zi extends Fu {

// int num=5;

//覆盖重写父类的show()

@Override

void show() {

System.out.println("Zi show");

}

}