面向对象Demo01

面向对象

什么是面向对象

回顾方法的定义

package oop;
​
import java.io.IOException;
​
public class Demo01 {public static void main(String[] args) {}//public String sayHello() {return "hello, world!";}public void sayHi() {return;}public int max(int a, int b) {return a > b ? a : b;//三元运算符}public void readFile(String fileName) throws IOException {}
}

打卡！打卡！打卡！打卡！打卡！

狂神链接