Compute SHA-1 of byte array

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What about:

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Formatter;

public static String SHAsum(byte[] convertme) throws NoSuchAlgorithmException{
    MessageDigest md = MessageDigest.getInstance("SHA-1"); 
    return byteArray2Hex(md.digest(convertme));
}

private static String byteArray2Hex(final byte[] hash) {
    Formatter formatter = new Formatter();
    for (byte b : hash) {
        formatter.format("%02x", b);
    }
    return formatter.toString();
}

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