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");
}
}