Java Snippet: Calculate SHA-1 hash of a string

SHA1HashTest.java

import java.security.MessageDigest;

class SHA1Hash {
    
    public static String getHexDigest(String str) throws java.security.NoSuchAlgorithmException {
        MessageDigest md = MessageDigest.getInstance("SHA-1"); 
        return byteArrayToHex(md.digest(str.getBytes()));
    }

    public static String byteArrayToHex(byte[] bytes) {
        String result = "";
	for (int i = 0; i < bytes.length; i++) {
	    result += Integer.toString( ( bytes[i] & 0xff ) + 0x100, 16).substring( 1 );
	}
        return result;
    }
}

public class SHA1HashTest {

    public static void main(String args[]) throws Exception {
        System.out.println(SHA1Hash.getHexDigest("Hello World!"));
    } 
}