英文:
How to get enum value from string if value doesn't match
问题
我有枚举：
public enum Enumz{FIRST_VALUE(0, "one"),SECOND_VALUE(1, "two"),THIRD_VALUE(2, "three")private int id;private String name;}
如果我的字符串值与枚举字符串名称匹配，我该如何找到枚举值？例如：如果我有 String = "two"，我需要获得 ENUMZ.SECOND_VALUE。
英文:
I have enum:
public enum Enumz{FIRST_VALUE(0, "one"),SECOND_VALUE(1, "two"),THIRD_VALUE(2, "three")private int id;private String name;}
How can I find enum value if my String value match with enum string name? For example: if I have String = "two" I need to get ENUMZ.SECOND_VALUE.
答案1
得分: 1
public enum Enumz {FIRST_VALUE(0, "one"),SECOND_VALUE(1, "two"),THIRD_VALUE(2, "three");private int id;private String name;Enumz(int id, String name) {this.id = id;this.name = name;}public static Enumz fromString(String text) {for (Enumz b : Enumz.values()) {if (b.name.equalsIgnoreCase(text)) {return b;}}return null;}}class Sample {public static void main(String[] args) {System.out.println(Enumz.fromString("two"));}}
OUTPUT
SECOND_VALUE
英文:
public enum Enumz {FIRST_VALUE(0, "one"),SECOND_VALUE(1, "two"),THIRD_VALUE(2, "three");private int id;private String name;Enumz(int id, String name) {this.id = id;this.name = name;}public static Enumz fromString(String text) {for (Enumz b : Enumz.values()) {if (b.name.equalsIgnoreCase(text)) {return b;}}return null;}}class Sample{public static void main(String[] args) {System.out.println(Enumz.fromString("two"));}}
You can implement your own method inside enum and call that method every time you want enum using String.
Above code will printing an output as below
OUTPUT
SECOND_VALUE
答案2
得分: 1
你可以使用Java 8的stream替代for循环。
String serachValue = "two";Enumz enumz = Arrays.stream(Enumz.values()).filter(v -> serachValue.equalsIgnoreCase(v.name)).findFirst().orElse(null);
良好的做法是将它作为静态方法放入ENUM本身，正如其他人@Sagar Gangwal所解释的那样。
英文:
You can use Java 8 stream alternative to for loop
String serachValue = "two";Enumz enumz = Arrays.stream(Enumz.values()).filter(v -> serachValue.equalsIgnoreCase(v.name)).findFirst().orElse(null);
Good practice is always put it as a static method into the ENUM itself as explained by other @Sagar Gangwal.
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