枚举类型的每一个值都将映射到protected Enum(String name, int ordinal)构造函数中,在这里,每个值的名称都被转换成一个字符串,并且序数设置表示了此设置被创建的顺序。 public enum SizeEnum { SMALL,MEDIUM,LAGRE,EXTRA_LAGRE; } 1. 2. 3. 这段代码实际上调用了4次 Enum(
privatevoidwriteObject0(Object obj,boolean unshared)throws IOException{...//String类型 if (obj instanceof String) { writeString((String) obj, unshared); //数组类型 } else if (cl.isArray()) { writeArray(obj, desc, unshared); //枚举类型 } else if (obj instanceof Enum) { writeEnum((...
**66* 订单状态67*68* 实现带有抽象方法的枚举69*70*@authorjiqinlin71*72*/73publicenumOrderState {74/**已取消*/75CANCEL {publicString getName(){return"已取消";}},76/**待审核*/77WAITCONFIRM {publicString getName(){return"待审核";}},78/**等待付款*/79WAITPAYMENT {publicString getName(...
{returnmyEnums.value; } }return""; }/** * 枚举转List */publicstaticList<HashMap<String, String>> getAllTypeMap() { List<HashMap<String, String>> list =newArrayList<>();for(MyEnums myEnums : EnumSet.allOf(MyEnums.class)) { HashMap<String, String> map =newHashMap<>(); map....
enum全称为enumeration,中文意为枚举,枚举简单的说就是一种数据类型,只不过是这种数据类型只包含自定义的特定数据,它是一组有共同特性的数据的集合。 创建枚举类型是需要用到enum关键字,如: public enum Color{ RED, GREEN, BLUE, BLACK, PINK, WHITE; } 1. 2. 3. enum的语法看似与class...
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...
out.println("获取该枚举对象的Class对象引用,"+declaringClass);//javase.enumeration.Weekday //6、通过getEnumConstants()获取该枚举类型的所有元素,如果Class对象不是枚举类型,则返回null。 Object[] enumConstants = declaringClass.getEnumConstants(); //枚举类个数,Weekday.values().length) for (int i...
public enum State { Normal, Update, Deleted, Fired } 在Java中用enum来定义常量在语法上没有什么优势,但是enum枚举类型可以提供更多的操作功能。 3、在enum中实现接口 先来看下面一段代码: public interface ICanReadState { void read(); String getState(); ...
*/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(int i=0;i<days.length;i++){System.out.println("day["+i+"].ordinal():"+days[i].ordinal());}System.ou...
.getAllErrors() .stream() .map(DefaultMessageSourceResolvable::getDefaultMessage) .collect(Collectors.joining(",")); resp = R.builder() .code(ResultCodeEnum.BUSINESS_ERROR.getCode()) .message(errorMsg).success(false) .build(); } 参考:...