I saw this in java code.
"anObject?.property" and
"anObject?.getProperty()".
I have tried look for it online. But could not find any. What does "?." mean here in Java?
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azro
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4This doesn't exist in Java. Are you sure it wasn't something else, like Kotlin or Scala? – Tom Mar 06 '19 at 21:53
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*If* it was actually Kotlin, then this has your answer: https://stackoverflow.com/questions/43826699/single-exclamation-mark-in-kotlin – Tom Mar 06 '19 at 22:04
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This isn't core Java, but it would be present in Groovy, Kotlin, or EL, among others. – chrylis -cautiouslyoptimistic- Mar 06 '19 at 22:09
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You guys are right. It is in groovy file. Since most groovy code are kinda in/similar to Java. So I was confused. – user11162261 Mar 07 '19 at 18:16
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Would you mind accepting an answer or comment to ask for more ? – azro Mar 21 '19 at 21:49
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This does not exists is Java
You may find this in Kotlin and this is called null safety
val a = "Kotlin"
val b: String? = null
println(b?.length)
println(a?.length)
azro
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