In thisguide to Javaenumwith string values, learn tocreate enum using strings, iterate over all enum values, get enum value and perform a reverse lookup tofind an enum by stringparameter. We should always create
When we create an enum class, the compiler will create instances (objects) of each enum constants. Also, all enum constant is alwayspublic static finalby default. Example 3: Java Enum Class enumSize{ SMALL, MEDIUM, LARGE, EXTRALARGE;publicStringgetSize(){// this will refer to the object ...
EnumMap<Color, String> enumStringEnumMap = new EnumMap<Color, String>(Color.class); enumStringEnumMap.put(Color.RED,"红色2"); enumStringEnumMap.put(Color.GREEN,"绿色2"); enumStringEnumMap.put(Color.BLUE,"蓝色2"); for(Map.Entry<Color,String> enumStringEntry : enumStringEnumMap.entrySet...
属性约束例抽象类Abstract 或者 Base 开头BaseUserService枚举类Enum 作为后缀GenderEnum工具类Utils 作为后缀StringUtils异常类Exception 结尾RuntimeException接口实现类接口名+ ImplUserServiceImpl领域模型相关/DO/DTO/VO/DAO正例:UserDAO 反例:UserDo, UserDao设计模式相关类Builder,Factory 等当使用到设计模式时,需要使...
众所周知,enum类型实例数量是固定的,甚至还被用来设计单例。但有时候仍然存在需要动态增加Enum实例的场景,这也并非一定是设计失败,也可能是增加灵活性的实际需求,比如一些web框架, 中的动态用户自定义词性。然而最大的障碍是switch语句生成的虚构类,本文参考Java Specialists第161期,提供一份可用的解决方案与实例代码...
enumReturnAddress{MISSING,OK1,OK2,OK3,OK4,OK5} GeneralDelivery generalDelivery; Scannability scannability; Readability readability; Address address; ReturnAddress returnAddress; staticlongcounter=0; longid=counter++; @OverridepublicStringtoString(){ ...
publicclassEnumDemo {publicstaticvoidmain(String[] args){//创建枚举数组Day[] days=newDay[]{Day.MONDAY, Day.TUESDAY, Day.WEDNESDAY, Day.THURSDAY, Day.FRIDAY, Day.SATURDAY, Day.SUNDAY};for(inti = 0; i <days.length ; i++) { System.out.println("day["+i+"].ordinal():"+days[i].or...
* 类名首字母小写 作为spring容器beanMap的key */publicstaticStringtransformName(String className){String tmpstr=className.substring(className.lastIndexOf(".")+1);returntmpstr.substring(0,1).toLowerCase()+tmpstr.substring(1);}}
Class类的实例表示java应用运行时的类(class ans enum)或接口(interface and annotation)(每个java类运行时都在JVM里表现为一个class对象,可通过类名.class、类型.getClass()、Class.forName("类名")等方法获取class对象)。数组同样也被映射为为class 对象的一个类,所有具有相同元素类型和维数的数组都共享该 Class...
final String aSimpleName ) { processingEnv.getMessager().printMessage( Diagnostic.Kind.NOTE, "Entered createEntity(Entity,AnnotationMirror,String)..." ); try { Map<? extends ExecutableElement, ? extends AnnotationValue> mirrorMap = aMirror.getElementValues(); ...