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Groups > comp.lang.java.programmer > #38961

Re: assign lambda to functional interface

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On Saturday, May 11, 2019 at 10:28:36 AM UTC+5:30, gk wrote:
> Can we assign a expression into an interface like this ?
> 
> import java.util.function.Predicate;
>  
> public class Main { 
> 	public static void main(String[] args) 
> 	{ 
> 		// Creating predicate 
> 		Predicate<Integer> lesserthan = i -> (i < 18); // is it valid?
> 
> 		// Calling Predicate method 
> 		System.out.println(lesserthan.test(10)); 
> 	} 
> }

Does lambda expression always have to return boolean ?  or lambda can return anything ?
most example shows boolean return by lambda expression. 

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assign lambda to functional interface gk <srcjnu@gmail.com> - 2019-05-10 21:58 -0700
  Re: assign lambda to functional interface Eric Sosman <esosman@comcast-dot-net.invalid> - 2019-05-11 06:31 -0400
    Re: assign lambda to functional interface gk <srcjnu@gmail.com> - 2019-05-11 05:57 -0700
      Re: assign lambda to functional interface Eric Sosman <esosman@comcast-dot-net.invalid> - 2019-05-11 09:38 -0400
  Re: assign lambda to functional interface gk <srcjnu@gmail.com> - 2019-05-12 06:28 -0700
    Re: assign lambda to functional interface Eric Sosman <esosman@comcast-dot-net.invalid> - 2019-05-12 10:22 -0400

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