Wrong indexOf in String Array

Question

I want to sort a String array by second char, but index of char at position "1" is always -1 and so sort does not working. What is wrong? ``` String[] wordList = outString.toString().split(", "); for (int i = 0; i < wordList.length; i++) { int n =wordList[i].indexOf(wordList.toString().charAt(1)); } Arrays.sort(wordList, 1,0); for (String str : wordList) { System.out.println(str); } ```

Accepted Answer

This `wordList.toString().charAt(1)` gives you the `toString()` representation of a `String[]`, which is probably not what you want.

```
String [] test = new String [] {"a","b","c"};
System.out.println(test.toString());
```

Output

```
[Ljava.lang.String;@23fc4bec
```

You should find sorting by the second index easier if you use a custom Comparator and allow `Collections.sort()` to sort your wordList (after putting it into a `List` first).

Also note that your split contains a whitespace which can lead to some more confusion `split(", ");`.

Wrong indexOf in String Array

Solution

Problem