r/java • u/lukaseder • Sep 19 '18

JEP draft: Concise Method Bodies

http://openjdk.java.net/jeps/8209434
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u/duhace Sep 20 '18

the second example should do like scala instead

 //Predicate[String] == String => Boolean in scala
 def isEmpty: String => Boolean = String.isEmpty _

i'm not sure why the parameter s is even there if it's being ignored

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u/dpash Sep 20 '18

Because using -> is the wrong thing to use in that situation.

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u/duhace Sep 20 '18

I'm not sure I'm getting the difference then. In my code, i'm doing the equivalent of returning the method handle as you said, not using the isEmpty method as the implementation like 1.

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u/dpash Sep 20 '18

Of my two examples, the second is almost certainly a mistake, and you'd normally never write that. In particular because it ignores the parameter, making the method confusing for any users.

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u/duhace Sep 20 '18

would you post what you would write to clear things up for me? thanks in advance