Example: Lookup enum by string value
enum class TextStyle {
BOLD, ITALICS, UNDERLINE, STRIKETHROUGH
}
fun main(args: Array<String>) {
val style = "Bold"
val textStyle = TextStyle.valueOf(style.toUpperCase())
println(textStyle)
}
When you run the program, the output will be:
BOLD
In the above program, we've an enum TextStyle which represents the different styles a block of text can have, i.e. Bold, Italics, Underline, Strikethrough.
We also have a string named style which holds the current style we want. However, it is not in all-caps.
We then use the enum TextStyle's valueOf() method to pass the style and get the enum value we require.
Since, valueOf() takes case-senstitive string value, we had to use toUpperCase() method to convert the given string to upper case.
If, instead, we'd used:
TextStyle.valueOf(style)
the program would've thrown an exception No enum constant EnumString.TextStyle.Bold.
Here's the equivalent Java code: Java program to lookup enum by string value.