SHA-1 em Java

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
 
public class sha1it {
    public static void main(String[] args) throws NoSuchAlgorithmException {
        if (args.length==0) return;
 
        MessageDigest md = MessageDigest.getInstance("SHA1");
        md.update(args[0].getBytes());
        byte[] newHash = md.digest();
        StringBuffer newHashStringBuffer = new StringBuffer();
        for ( int i = 0; i < newHash.length; i++ )
            newHashStringBuffer.append(Integer.toHexString(newHash[i]&0xff));
        System.out.println(newHashStringBuffer.toString());
    }
}