How to concatenate Special symbol as colon after every 2 character in Android

Question

I want to concatenate or append special character as colon : after an every 2 character in String.

For Example: Original String are as follow:

String abc =AABBCCDDEEFF;

After concatenate or append colon are as follow:

  String abc =AA:BB:CC:DD:EE:FF;

So my question is how we can achieve this in android.

Thanks in advance.

Answer 1

You can try below code, if you want to do without Math class functions.

StringBuilder stringBuilder = new StringBuilder();
    for (int a =0; a < abc.length(); a++) {
        stringBuilder.append(abc.charAt(a));
        if (a % 2 == 1 && a < abc.length() -1)
            stringBuilder.append(":");
    }

Here

1. a % 2 == 1 ** ==> this conditional statement is used to append **":"
2. a < abc.length() -1 ==> this conditional statement is used not to add ":"

in last entry. Hope this makes sense. If you found any problem please let me know.