Reputation: 37
I am new to Kotlin and mainly programmed Java before. The Problem is I have this:
private fun createUrl(stringUrl: String): URL? {
try {
return URL(stringUrl)
} catch (e: MalformedURLException) {
return null
}
}
That is just the style I was used to in Java. I would just check if the URL is null in the next method, but what is the Kotlin equivalent? What would I return in Kotlin?
Greetings
Upvotes: 0
Views: 1844
Reputation: 5392
You already wrote this in Kotlin, so not entirely sure of your whole question. However, returning URL? is perfect.
Then you can do
mWebURL.set(createUrl(myString))
or
mWebURL.set(createUrl(myString)?: "alternativeURL")
if you have an observable that is ok accepting null.
Or if you need to take an action on it, you can simply do
createUrl(myString)?.nextAction() //only occurs if not null
or you can use
createURL(myString)?.let{
//will happen if not null
}
or
createURL(myString)?.apply{
//will happen if not null
}
or of course simple
if(createUrl(myString) == null){
//will happen if not null
}
Upvotes: 4