Ricky :
I have a array and want to multiply the elements greater than 9 by 2 and lesser than or equal to 9 by 3.
List<Integer> list = Arrays.asList(3, 6, 9, 12, 15);
list.stream().map(number -> number * 3).forEach(System.out::println);
This one multiplies everything by 3 , where
list.stream().filter(number -> number>3).map(number -> number * 3).forEach(System.out::println);
this one multiplies but also filters.
I want 3 ,6 ,9 multiplied by 3 and 12, 15 multiplied by 2.
Any help is appreciated.
Amongalen :
In case someone don't like the ternary operator in Eran's answer, you could use a block instead, like this:
list.stream()
.map(n -> {
if (n > 9){
return n * 2;
}
else {
return n * 3;
}
})
.forEach(System.out::println);
I think the solution with ternary operator is cleaner in this specific case but this is an option as well. It might be useful if there are more conditions.
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