类实例化oppdemo2

//学生类
public class Student {
    //属性：字段
    String name;//null
    int age;//0

    //方法
    public void study(){
        System.out.println(this.name+"在学习");
    }

}

/*
public class Application {
    public static void main(String[] args) {
        //类：抽象的，实例化的
        //类实例化后会返回一个自己的对象
        //student
        //student对象就是一个Student类的具体实例
        Student xm = new Student();
        Student xh = new Student();

        xm.name = "小明";
        xm.age = 10;
        System.out.println(xm.name);
        System.out.println(xm.age);

        xh.name = "小红";
        xh.age = 15;
        System.out.println(xh.name);
        System.out.println(xh.age);
    }
}
 */