Easiest way to get Enum in to Key Value pair

enums, java

Solution

Provided you need to map from the textual values to the enum instances:

Map<String, UserType> map = new HashMap<String, UserType>();
map.put(RESELLER.getName(), RESELLER);
map.put(SERVICE_MANAGER.getName(), SERVICE_MANAGER);
map.put(HOST.getName(), HOST);

or a more generic approach:

for (UserType userType : UserType.values()) {
    map.put(userType.getName(), userType);
}

Problem

I have defined my Enums like this. ``` public enum UserType { RESELLER("Reseller"), SERVICE_MANAGER("Manager"), HOST("Host"); private String name; private UserType(String name) { this.name = name; } public String getName() { return name; } } ``` What should be the easiest way to get a key-value pair form the enum values? The output map i want to create should be like this ``` key = Enum(example:- HOST) value = Host ``` The map I want do define is ``` Map<String, String> constansts = new HashMap<String, String>(); ``` Ans: What I Did I have created a Generic Method to access any enum and change values from that to a Map. I got this IDEA, form a code fragment found at here in any other thread. ``` public static <T extends Enum<T>> Map<String, String> getConstantMap( Class<T> klass) { Map<String, String> vals = new HashMap<String, String>(0); try { Method m = klass.getMethod("values", null); Object obj = m.invoke(null, null); for (Enum<T> enumval : (Enum<T>[]) obj) { vals.put(enumval.name(), enumval.toString()); } } catch (Exception ex) { // shouldn't happen... } return vals; } ``` Now, After this all I have to do is call this method with all the enum constructs and i am Done. One More thing To get This done i have to orverride the toString Method like this ``` public String toString() { return name; } ``` Thanks.

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