SHA1 Hash fuction - JAVA

Sha1Hash.java

public class Sha1Hash {
    
    /** Creates a new instance of Sha1Hash */
    public Sha1Hash() {
    }

    /**
     * @param inputData
     * @return
     */
    public String getHashedValue(String inputData) {
        String sResp = null;
        try {
            byte byteHash[];
            MessageDigest sha1 = MessageDigest.getInstance("SHA-1");
            sha1.update(inputData.getBytes("utf-8"));
            byteHash = sha1.digest();
            sha1.reset();
            

    // see code snippet below..
            String hash = Base64Util.encode(byteHash);
            
            return hash.substring(0, (hash.length()/2));
        } catch (Exception e) {
            System.err.println("getHashedValue failed: " + e.getMessage());
            return null;
        }
    }
    
    private String toHexString(byte[] array) {
        StringBuilder sb = new StringBuilder ();
        
        for (int i=0; i< array.length; i++) {
            String hex = "0"+Integer.toHexString(array[i]);
            String end = hex.substring(hex.length()-2);
            sb.append(end.toUpperCase());
        }
        System.err.println("HASH:"+sb.toString());        
        return sb.toString();
    }       
}