目录 宏定义(#define) 概念 无参宏定义 举个例子 #define 用法的几点说明 带参数的宏定义 带参宏定义的说明 枚举类型(enum 关键字) 概念 过度 类型创建 类型定义,初始化 赋值 作为函数即返回值 typedef 存在的意义 用法 typedef 和 #define 的区别 宏定义(#define) 概念 #define 叫做宏定义命令,它也是 C ...
Enum 枚举: 1. 只能取特定值中的一个 2. 使用enum关键字 3. 所有枚举类隐性继承java.lang.Enum(枚举本质还是类,每个被枚举的成员实质就是一个枚举类型的实例,默认都是public static final的) 可以直接通过枚举类型名直接点出他们. 4. 强烈建议当需要定义一组常量时,使用枚举类型 5. 尽量不要使用枚举... ...
C中通常用#define,,C++就像上所说.用const 了.. 或是枚举enum方法.. #define命令也就是宏定义命令.. 1.作变量说明: #definePI 3.1415926 2.宏嵌套,一个宏名也可以出现在另一个宏定义的宏替换体中.. #defineRAD PI/180 3.作符号替换用 #defineERROR "error!!" 4.宏定义还可以作为语句..或是带参数....
public enum DatabaseMessage implements IMessage { CONNECTION_FAILURE(DatabaseCode.CONNECTION_FAILURE, ...); } Now you have several options to turn those into Strings. You can compile the strings into your code (using annotations or enum constructor parameters) or you can read them from a con...
While I realize that Java 8 resolves this issue, I thought I'd chime in with a scenario I am currently working on (locked into using Java 7) where being able to specify static methods in an interface would be helpful. I have several enum definitions where I've defined "id" and "displ...
计算机术语define 定义 计算机术语define 定义 abstract 抽象的 抽象的 abstraction 抽象体、抽象物、抽象性 抽象体、抽象物、抽象性 access 存取、取用 存取、访问 access function 存取函式 存取函数 activate active adapter 配接器 适配器 address 位址 地址 address space 位址空间，定址空间 address-of operator ...
public enum ColorType { Green,// 绿色 Hong,// 红色 } 写第一个程序,包名叫java,然后各种报错…… 自减原来是这么用的 本世纪最强函数没有之一 真的可以完美破封(不信你试试) #define private public try-catch的妙用 try{ //这段代码是有错的,可这家伙不debug ...
What are some algorithms we use in everyday life? Write them out in a clear notation, and explain how they meet all criteria for algorithms. What is meant by encryption and decryption? Define hard drive Define hard disk drive In Java, what is the String constant pool? Explain the enum da...
Version: grpc-protobuf 1.14.0 Language: Java OS: Windows 7 Steps to reproduce the behavior: Define the following two enum in the same proto file, both TestEnum1 and TestEnum2 have a enum constant named UNKNOWN. enum TestEnum1 { IDLE = 0;...
ScopedProxyMode scopedProxyMode = componentScan.getEnum("scopedProxy"); if (scopedProxyMode != ScopedProxyMode.DEFAULT) { scanner.setScopedProxyMode(scopedProxyMode); } else { Class<? extends ScopeMetadataResolver> resolverClass = componentScan.getClass("scopeResolver"); ...