All Questions
7 questions
8
votes
0
answers
822
views
What lambda function optimizations, if any, are planned for Java 9 and beyond? [closed]
I'm working on a high-performance project where Java 8's lambda functions are enormously useful. I've found, however, that they're memory inefficient when used en masse. For example, suppose I need to ...
- 349
0
votes
1
answer
85
views
How confusing is `new SomeCollection(values...)::contains` as a Predicate? [closed]
Traditionally, a function that want to skip certain items during processing will accept a Collection or var-args argument, but in the Java 8 world I think I should switch to Predicates.
Now, since ...
- 630
50
votes
4
answers
22k
views
Why should I use "functional operations" instead of a for loop?
for (Canvas canvas : list) {
}
NetBeans suggests me to use "functional operations":
list.stream().forEach((canvas) -> {
});
But why is this preferred? If anything, it is harder to read and ...
- 3,937
71
votes
3
answers
34k
views
Is there a performance benefit to using the method reference syntax instead of lambda syntax in Java 8?
Do method references skip the overhead of the lambda wrapper? Might they in the future?
According to the Java Tutorial on Method References:
Sometimes... a lambda expression does nothing but call an ...
- 14.9k
5
votes
3
answers
543
views
Does it make sense to split up an existing multi-method interface into several single method interfaces just to take advantage of lambdas?
Say I have an existing callback interface that has multiple methods. To illustrate my point I use a callback the likes that you would see in code that performs some HTTP client operations:
public ...
- 190
2
votes
2
answers
6k
views
How the Stream.filter() method works?
I know how the lambda expresion works and I know it is an argument for .filter() that establish the criteria to filter with. But I don't get how .filter() uses the argument, in this case a lambda ...
- 21
31
votes
1
answer
17k
views
Type inference in Java 8
Is the introduction of the new lambda notation (see e.g. this article) in Java 8 going to require some kind of type inference?
If so, how will the new type system impact the Java language as a whole?
- 19.8k