Question

The following is my java code snippet:

static String sortChars(String s) {
    char[] chars = s.toCharArray();
    Arrays.sort(chars);
    return chars.toString();
}

I invoke above function by using:

String result = sortChars(s);

But the result does not meet my expectation:for example,the s=”are”, the result=”aer”. However, when I use:

return new String(chars)

It works.
Could somebody tell me the reason of it. Thanks

Answer 1

Since char[] class does not override the default Object‘s toString() implementation, it does not return a string composed by the characters in the char array, but the char[] class name + hash code. For example: arr[C@19821f.