如何在java中制作像枚举一样的键值
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How to make key value like enum in java
提问by Saqib Ahmed
I need to make an Enumcontaining some strings with spaces and their values in intlike:
我需要制作一个Enum包含一些带有空格和它们的值的字符串，int例如：
public enum status{
Active(1),
Inactive(2);
}
because I am using it with hibernate and also will convert it to JSON for alpaca js forms.
因为我将它与 hibernate 一起使用，并且还将其转换为 JSON 以用于 alpaca js 表单。
like:
喜欢：
[{"text": "Inactive", "value":"2"},{"text": "Active", "value":"1"}]
I'm stuck in making enum. how to make such type of enum?
我被困在制作enum. 如何制作这种类型的enum？
采纳答案by Chandana Kumara
You can not put space between strings. Instead of the you can use underscore as follows:
您不能在字符串之间放置空格。您可以使用下划线代替 ，如下所示：
In_Active
You can use this way:
你可以这样使用：
enum Status {
ACTIVE("Active", 1), IN_ACTIVE("In Active", 2);
private final String key;
private final Integer value;
Status(String key, Integer value) {
this.key = key;
this.value = value;
}
public String getKey() {
return key;
}
public Integer getValue() {
return value;
}
}
回答by Someone
You can't put a space in the middle of an identifier.
您不能在标识符中间放置空格。
Check out this link Is it possible to assign numeric value to an enum in Java?for assigning the value to an enum in java.
查看此链接是否可以在 Java 中为枚举分配数值？用于将值分配给 java 中的枚举。
回答by GameDroids
You can hold multiple values in one enumand even have getters to handle them. Here is an example I used once (I try to adapt it to your problem):
您可以在一个中保存多个值enum，甚至可以使用 getter 来处理它们。这是我曾经使用过的一个示例（我尝试使其适应您的问题）：
public enum Status{
ACTIVE(1, "Active"),
INACTIVE(2, "In Active");
private final Integer value;
private final String text;
/**
* A mapping between the integer code and its corresponding text to facilitate lookup by code.
*/
private static Map<Integer, Status> valueToTextMapping;
private Status(Integer value, String text){
this.value = value;
this.text = text;
}
public static Status getStatus(Integer i){
if(valueToTextMapping == null){
initMapping();
}
return valueToTextMapping.get(i);
}
private static void initMapping(){
valueToTextMapping = new HashMap<>();
for(Status s : values()){
valueToTextMapping.put(s.value, s);
}
}
public Integer getValue(){
return value;
}
public String getText(){
return text;
}
@Override
public String toString(){
final StringBuilder sb = new StringBuilder();
sb.append("Status");
sb.append("{value=").append(value);
sb.append(", text='").append(text).append('\'')
sb.append('}');
return sb.toString();
}
}
So in your code you can simply use Status.ACTIVEand it will represent an instance of your Enum, that holds valueand textthe way you want it
因此，在你的代码，你可以简单地使用Status.ACTIVE，这将代表您的枚举的实例，保存value和text你想要的方式
