英文:
Collect values from an enum with stream doesn't work
问题
以下是翻译好的部分：
我想要一个包含枚举几乎所有值的列表。我尝试使用流来实现，但我不知道为什么它不起作用。
例如，我试图这样做：
SortingType.stream() //.filter(d -> !d.getName().equals(SortingType.UNKNOWN.getName())).forEach(u -> {sortingList.add(createSortingBE(locale, u, u.name().equalsIgnoreCase(sortingType.name())));});
.stream() 部分显示为红色，并显示以下消息："无法解析方法 'stream' 在 'SortingType' 中"。
排序类型
public enum SortingType {DISTANCE("DISTANCE", 101, "按距离排序POI"),PRICE("PRICE", 104, "按价格排序POI"),UNKNOWN("UNKNOWN", 000, "未知排序选项");private String name;private Integer identifier;private String description;SortingType(final String name, final Integer identifier, final String description) {this.name = name;this.identifier = identifier;this.description = description;}public static SortingType getByName(final String name) {return Stream.of(values()).filter(u -> u.name.equalsIgnoreCase(name)).findFirst().orElse(SortingType.UNKNOWN);}public static SortingType getByIdentifier(final Integer identifier) {return Stream.of(values()).filter(u -> u.identifier.equals(identifier)).findFirst().orElse(SortingType.UNKNOWN);}public String getDescription() {return description;}public Integer getIdentifier() {return identifier;}public String getName() {return name;}
英文:
I want to have a list with almost all the values from an enum. I tried to do that with the help of stream but I don't know why it is not working.
For example I am trying to do like this:
SortingType.stream() //.filter(d -> !d.getName().equals(SortingType.UNKNOWN.getName())).forEach(u -> {sortingList.add(createSortingBE(locale, u, u.name().equalsIgnoreCase(sortingType.name())));});
.stream() appears with red and I receive this message : " Cannot resolve method 'stream' in 'SortingType' "
Sorting Type
public enum SortingType {DISTANCE("DISTANCE", 101, "Sorting POIs by distance"),PRICE("PRICE", 104, "Sorting POIS by price"),UNKNOWN("UNKNOWN", 000, "Unknown sorting option");private String name;private Integer identifier;private String description;SortingType(final String name, final Integer identifier, final String description) {this.name = name;this.identifier = identifier;this.description = description;}public static SortingType getByName(final String name) {return Stream.of(values()).filter(u -> u.name.equalsIgnoreCase(name)).findFirst().orElse(SortingType.UNKNOWN);}public static SortingType getByIdentifier(final Integer identifier) {return Stream.of(values()).filter(u -> u.identifier.equals(identifier)).findFirst().orElse(SortingType.UNKNOWN);}public String getDescription() {return description;}public Integer getIdentifier() {return identifier;}public String getName() {return name;}
答案1
得分: 1
你应该简单地像这样添加 stream() 方法。
public enum SortingType {// .....public static Stream<SortingType> stream() {return Stream.of(values());}}
英文:
You should simply add the stream() method like this.
public enum SortingType {// .....public static Stream<SortingType> stream() {return Stream.of(values());}}
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