暑假学习第三天

面向对象：类 对象

package com.yang.www.base.objectproject;

public class Dog {
    String name;
    int age;
    float weight;
    public static void main(String[] args) {
        Dog duoduo = new Dog();
        duoduo.name = "多多";
        duoduo.age = 6;
        duoduo.weight = 13.5f;
        Dog lucky = new Dog();
        lucky.name = "lucky";
        lucky.age = 3;
        lucky.weight = 12.2f;
        System.out.println(duoduo.name+"今天"+duoduo.age+"岁了");
        System.out.println(lucky.name+"体重"+lucky.weight+"kg");
    }
}
Method

package com.yang.www.base.objectproject;

public class Method01 {
    public String isOddNumber(int num){
        System.out.println("原始数字为:" + num);
        if (num % 2 == 0){
            return "偶数";
        }
        else{
            return "奇数";
        }

    }
    public static void main(String[] args) {
        int a = 10;
        Method01 method01 = new Method01();
        String r1 = method01.isOddNumber(a);
        System.out.println(a + "是" + r1);
        int b = 5;
        String r2 = method01.isOddNumber(b);
        System.out.println(b + "是" + r2);
    }
}
三元运算符：x ？ y : z
如果x==true 则结果为y 否则结为z
包机制
倒置域名为包名
引用包为import

标签：System,String,第三天,duoduo,lucky,学习,暑假,public,out
来源： https://www.cnblogs.com/lyy-599/p/16434975.html