Java sorting an String Array by a Substring of characters

Question

I need to sort an array of strings like the following, by a substring of characters:

[0] = \"gtrd3455\";
[1] = \"wsft885\";
[2] = \"ltzy96545\";
[3] = \"scry         


        

Answer 1

You can use a Comparator, and use Array#sort method with it, to sort it according to your need: -

String[] yourArray = new String[3];
yourArray[0] = "gtrd3455";
yourArray[1] = "ltzy96545";
yourArray[2] = "lopa475";

Arrays.sort(yourArray, new Comparator<String>() {
    public int compare(String str1, String str2) {
        String substr1 = str1.substring(4);
        String substr2 = str2.substring(4);

        return Integer.valueOf(substr2).compareTo(Integer.valueOf(substr1));
    }
});

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

OUTPUT: -

[ltzy96545, gtrd3455, lopa475]