T::class.java.newInstance() deprecated

Question

inline fun <reified T> blah(block: T.() -> Unit): Something {
    request = T::class.java.newInstance()

that newInstance() is deprecated, usually when you go to the source, it says why it's deprecated and what the alternative is, but this time i'm only seeing:

/** @deprecated */
@CallerSensitive
@Deprecated(
    since = "9"
)
public T newInstance() throws InstantiationException, IllegalAccessException {
    // ...
}

What is the new non-deprecated way to create an instance of a reified type in Kotlin?

Update: More information as requested:

JDK Version: 11 (not Android, just pure JVM)
Kotlin Version:1.3.61

the reason of deprecation is here

Eugene
– Eugene

2020-02-10 17:08:14 +00:00
Commented Feb 10, 2020 at 17:08 — Eugene
– Eugene, Commented Feb 10, 2020 at 17:08

Roland · Accepted Answer · 2020-02-10 08:09:52Z

3

Actually this comes from Java itself. The appropriate replacement is:

T::class.java.getDeclaredConstructor().newInstance()

You can also check the Class.newInstance()-Javadoc which states that too.

answered Feb 10, 2020 at 8:09

Roland

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1 Comment

Roland Over a year ago

getDeclaredConstructor (note the missing s) should work... it accepts a variable amount of parameter types...

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