CODEWITHSUNDEEP
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glen maxwell
glen maxwell

Reputation: 203

No Enum constant found for type in java

I am using enum in java, Here is the enum

public enum AbuseSectionType{

    MUSIC("Music"), DANCE("Dance"), SOLO("Solo"), ACT("Act")

    private String displayString;

    AbuseSectionType(String displayValue) {
        this.displayString = displayValue;
    }

    @JsonValue
    public String getDisplayString() {
        return displayString;
    }

    public void setDisplayString(String displayString) {
        this.displayString = displayString;
    }
}

I am trying to get value AbuseSectionType.valueOf("Music"). I am getting no enum constant and found no error. I am supposed to have value MUSIC.

Upvotes: 5

Views: 30456

Answers (3)

Ashutosh Jha
Ashutosh Jha

Reputation: 1513

use AbuseSectionType.valueOf("MUSIC") pass the name of enum. See java docs regarding use of valueOf

Upvotes: 0

Winter
Winter

Reputation: 4095

The name() of an enum is the name specified when declaring it, MUSIC in your case.

If we read the javadoc for valueOf():

Returns the enum constant of the specified enum type with the specified name.

valueOf() is using the name() of the enum. But what you want to achieve is different, so you cannot use this method. What you can do instead is to make your own method that finds the value from your own field (displayString).

Here's an example:

public static AbuseSectionType fromDisplayString(String displayString)
{
    for(AbuseSectionType type : AbuseSectionType.values())
        if(type.getDisplayString().equals(displayString)
            return type;

    return null; //not found
}

Upvotes: 6

Raven
Raven

Reputation: 3516

The default valuOf() method will only retrieve the respective enmum if the exact spelling of the enum-definition is used. In your case you have defined the enum MUSIC so in order to get that one you have to do it like this: AbuseSectionType.valueOf("MUSIC");

In order to achieve what you seem to want you have to implement a method in the enum class by yourself. For your example you could do somthing like this: 

public AbuseSectionType resolve(String name) {
    for(AbuseSectionType current : AbuseSectionType.values()) {
        if(current.displayString.equals(name)) {
            return current;
        }
    }

    return null;
}

Upvotes: 0

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