如何限制 java 列表中的条目数？

Question

I know how to limit size in Map ( like this ,using LinkedHashMap.removeEldestEntry method does exactly that)

I want to know how to limit size in a List,what is a best way to implement?

thanks for help:)

Answer 1

You could try create a new list with streams. If are only 10 don't should be a performance problem create a new list.

list = list.stream().limit(10).collect(Collectors.toList());

Answer 2

I would look at the java.util.Collections class source and develop a SizeLimitedList similar to how they do a checkedList. Then on add I would delete the first entry from the list if the list was full.

Answer 3

List b = new ArrayList<>(a.subList(0, 10));