Android Kotlin Statement to Java Convert

Question

I am building an App using CameraX API. I'm following android codelab example. In Codelab, The project is written on Kotlin, but in my project, I am using Java. I can't understand how do I convert these statements to java? Even I don't know, what is this line does.

// Get a stable reference of the modifiable image capture use case
val imageCapture = imageCapture ?: return

@dominicoder No, I just want to know how is it works. I am not familiar with ```?:```. Thank you. — Abu Sufian Shawon, Sep 19 '21 at 09:17
@AbuSufianShawon - "No, I just want to know how is it works. I am not familiar with ?:. Thank you." - The only question in your post is literally "I can't understand how do I convert these statements to java?", but OK. — dominicoder, Sep 20 '21 at 04:26

score 1 · Accepted Answer · answered Sep 19 '21 at 06:57

Koltin's null-safety: https://kotlinlang.org/docs/null-safety.html

The ?: in Kotlin is called elvis-operator and it replaces Java's:

if (imageCapture == null) {
    return
}

The code is checking if imageCapture is null and if so it returns and does not continue to the code below.

Android Kotlin Statement to Java Convert

1 Answers1