I must sort each item in the array, in alphabatic order

in : [bcdef, dbaqc, abcde, omadd, bbbbb] out : [bcdef, abcdq, abcde, addmo, bbbbb]

I wrote the code below but i feel it verbose(long).

Could you please tell me an other way, with shorter code ?

Thanks.

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

import static java.lang.String.copyValueOf;

public class Main {

    public static void main(String[] args) {
        String[] stringsArray = { "bcdef", "dbaqc", "abcde", "omadd", "bbbbb"};

        System.out.println(Arrays.toString(stringsArray));

        List<String> list = Arrays.stream(stringsArray).map((String s)->{
            char[] charArray = s.toCharArray();
            Arrays.sort(charArray);
            return copyValueOf(charArray);
        }).collect(Collectors.toList());
        ArrayList<String> arrayList = new ArrayList<String>(list);
        stringsArray = Arrays.copyOf(arrayList.toArray(),arrayList.size(),String[].class);

        System.out.println(Arrays.toString(stringsArray));
    }

}

CodePudding user response：

It looks like you want to sort characters within each element, not the whole array.

You could simplify by having separate map() (and peek() since Arrays.sort() method is not returning a value) steps. You could also skip redundant List by collecting directly to a String array.

String[] sorted = Arrays.stream(stringsArray)
    .map(String::toCharArray)
    .peek(Arrays::sort)
    .map(String::new)
    .toArray(String[]::new);

CodePudding user response：

If you want to modify the original array in-place, then you can rely on Arrays.asList(), which creates a List wrapper around the array:

Arrays.asList(stringsArray)
        .replaceAll(s -> {
            char[] chars = s.toCharArray();
            Arrays.sort(chars);
            return new String(chars);
        });

System.out.println(Arrays.toString(stringsArray));

Arrays.asList() is really just a view on the original array. Any change to the returned list will actually be done on the array, and vice-versa. This is also why you cannot add/remove elements on the returned list.