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package basic;

public class Test1 {

public static void main(String[] args) {

People people = new People();

//people.eat();

people.drink();

int a = 18 & 2;

System.out.println("a is:" + a);

}

}

class Animal {

public void eat() {

System.out.println("动物吃东西");

}

public void drink() {

System.out.println("动物喝东西");

eat();//todo 执行的是 子类的方法

}

}

class People extends Animal {

@Override

public void eat() {

System.out.println("人在吃饭");

}

}