This question already has answers here:
Reverse a comparator in Java 8
(6 answers)
Java 8 stream reverse order
(30 answers)
Closed 4 years ago.
I would like to show the highest values first, but its showing me the lower first:
songs.entrySet()
.stream()
.sorted(Comparator.comparing(Map.Entry::getValue))
.forEach(songs -> System.out.println(songs.getKey() + " Rate:" + songs.getValue()));
Related
This question already has answers here:
Filter values only if not null using lambda in Java8
(6 answers)
Filter null values after map in Java 8 [duplicate]
(1 answer)
Closed 6 months ago.
Let's say I have a Java Stream that contains null values.
How do you remove them ?
Here's a few ways I can think of:
stream.filter(x -> x != null).
stream.filter(Objects::nonNull)
This question already has answers here:
Simple way to repeat a string
(32 answers)
Print character multiple times [duplicate]
(5 answers)
Closed 2 years ago.
How can I print this in java?
###############
I know in python it is like this:
print("#" * 15)
This question already has answers here:
What is the ellipsis (...) for in this method signature?
(5 answers)
What do 3 dots next to a parameter type mean in Java?
(9 answers)
Closed 5 years ago.
I'm looking at the Files class in java 7, and I see this method
copy(InputStream, Path, CopyOptions...)
How do I read "CopyOptions...". What's the ... mean?
This question already has answers here:
Is there a longer than int Java List?
(3 answers)
Using a long as ArrayList index in java
(7 answers)
Closed 7 years ago.
I want to have a big ArrayList, so its index would go beyond int, how or what can I use for that?
I already checked that Vector does have the same issue, any ideas?
This question already has answers here:
:: (double colon) operator in Java 8
(17 answers)
Closed 7 years ago.
What does "::" do in this code?
Files.walk(Paths.get("res")).forEach(System.out::println);
I know that we use ':' for an enhanced for loop but I never saw 2 of them together
Double colon :: is called Method Reference.