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 createenumwhen we have a fixed set of related constants.Enums are inherently singleton,...
然后就不需要考虑它了-- toString和fromString完成了所有的工作：
*/ public E make(String value, int ordinal, Class[] additionalTypes, Object[] additional) { try { undoStack.push(new Memento()); ConstructorAccessor ca = findConstructorAccessor( additionalTypes, clazz); return constructEnum(clazz, ca, value, ordinal, additional); } catch (Exception e) { ...
String name) {//enumType.enumConstantDirectory()获取到的是一个map集合,key值就是name值,value则是枚举变量值//enumConstantDirectory是class对象内部的方法,根据class对象获取一个map集合的值T result =enumType.enumConstantDirectory().get(name);if(result !=null)returnresult;if(name ==null)thrownewNullPo...
package Chapter10; public class AnonymousInternal { public static void main(String[] args) { // java程序主入口处 // 所有方法的调用 createIinterface().showMess(); createAbstract().showMess(); createClass().showMess(); } public static A_interface createIinterface() { A_interface inter = ...
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...
enumReturnAddress{MISSING,OK1,OK2,OK3,OK4,OK5} GeneralDelivery generalDelivery; Scannability scannability; Readability readability; Address address; ReturnAddress returnAddress; staticlongcounter=0; longid=counter++; @OverridepublicStringtoString(){ ...
(1, "查询任务"),UPDATE(2, "更新任务");private final Integer code;private final String value;TaskTypeEnum(Integer code, String value) {this.code = code;this.value = value;}@Overridepublic Integer getCode() {return this.code;}@Overridepublic String getValue() {return this.value;}}复制...
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].ordinal());}System.out.pri...
创建人 */ private String createBy; /** * Update人;Update人 */ private String updateBy; /** * 是否Delete;是否Delete */ @LogicDelete(strategy = LogicDeleteStrategyEnum.BOOLEAN) private Boolean deleted; } @Data @Table("t_topic") @EntityProxy //or @EntityFileProxy @ToString public class ...