Sort ArrayList of Array in Java

Question

What is the best way to sort an ArrayList in Java?

Where String[] is...

String[] = new String[] { \"abc\", \"abc\", \"ab         


        

Answer 1

This is extremely easy to do with Java 8. Just write:

list.sort(Comparator.comparing(a -> a[1]));

For example, the following code:

List list = Arrays.asList(
    new String[] { "abc", "abc", "abc", "abc", "abc", "abc", "abc" },
    new String[] { "xyz", "xyz", "xyz", "xyz", "xyz", "xyz", "xyz" },
    new String[] { "fgh", "fgh", "fgh", "fgh", "fgh", "fgh", "fgh" });

list.sort(Comparator.comparing(a -> a[1]));
list.stream().map(Arrays::toString).forEach(System.out::println);

Will yield the wanted result:

[abc, abc, abc, abc, abc, abc, abc]
[fgh, fgh, fgh, fgh, fgh, fgh, fgh]
[xyz, xyz, xyz, xyz, xyz, xyz, xyz]