zoukankan      html  css  js  c++  java
  • Java中类体的构成

    class 类名{    类体的内容  }

                         /\

              (成员变量和  方法){定义类的成员变量时可以赋初值,注意:对成员变量的操作只能放在方法中}例如::class A{

                                 /\                                                                                                                                 int a=9;

                             (构造方法和对象调用)                                                                                                             float b=12.6f;

                                    |                                                                                                                                     void f(){a=12;b=12.56f}

                  (构造方法,它的名字必须与它的所在类的名字完全相同,而且没有返回型)                                                                                         }

      类所创建对象的调用首先要创建对象:

    类创建对象::(创建对象就是只为它分配成员变量)

    1:对象声明 (类的名字  对象名字)

    2:为声明的对象分配成员变量(用new运算符和类的构造方法)    

    Rect rectangleOne;

    rectangle=new Rect(10,20);         或者    Rect rectangleOne=new rect(10,20);

                                                                                                                     

                                                                                                                                                                                                                                                                                                         

  • 相关阅读:
    (4.7)怎么捕获和记录SQL Server中发生的死锁?
    SQLSERVER排查CPU占用高的情况
    (4.6)sql server索引缺失提示
    (4.14)向上取整、向下取整、四舍五入取整的实例
    mysql大致学习路径
    (2)linux未使用eth0,未使用IPV4导致无法连接
    (4.13)sql server参数嗅探(parameter sniffing)
    完美女人
    关于box-sizing
    什么是担当
  • 原文地址:https://www.cnblogs.com/wangchunmeix/p/2970107.html
Copyright © 2011-2022 走看看