Hello everyone! I need help. I can’t convert my ja...

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[lazexe]

Hello everyone!
I need help. I can’t convert my java utils class to kotlin. Let me show an example:
Java

public class Ut {
    public static String sha256(String input) throws NoSuchAlgorithmException {
        MessageDigest mDigest = MessageDigest.getInstance("SHA-256");
        byte[] result = mDigest.digest(input.getBytes());
        StringBuilder sb = new StringBuilder();
        for (byte aResult : result) {
            sb.append(Integer.toString((aResult & 0xff) + 0x100, 16).substring(1));
        }
        return sb.toString();
    }
}

Kotlin auto converter

@Throws(NoSuchAlgorithmException::class)
fun String.sha256(): String {
    val mDigest = MessageDigest.getInstance("SHA-256")
    val result = mDigest.digest(this.toByteArray())
    val sb = StringBuilder()
    for (aResult in result) {
        sb.append(Integer.toString((aResult and 0xff) + 0x100, 16).substring(1))
    }
    return sb.toString()
}

And I got error: http://prntscr.com/j1lw9b
Autofix fixed it: http://prntscr.com/j1lwkr

And test do not pass well 😞 http://prntscr.com/j1lx30

Please suggest me how to fix this line sb.append(Integer.toString((aResult and 0xff) + 0x100, 16).substring(1))