How do I create a message digest?

Creating a digest of a string message can be easily done using the general digester class Digester. First we need to get an instance of Digester, we call the class constructor and pass SHA-1 as the algorithm. After having a Digester instance we create the message digest by executing or calling the Digester.digest(byte[] binary) method of this class.

package org.kodejava.example.jasypt;

import org.jasypt.util.digest.Digester;

import java.util.Arrays;

public class DigesterDemo {
    public static void main(String[] args) {
        // Creates a new instance of Digester, using the SHA-1 algorithm.
        Digester digester = new Digester("SHA-1");

        byte[] message = "Hello World from Jasypt".getBytes();

        // Creates a digest from a array of byte message.
        byte[] digest = digester.digest(message);

        System.out.println("Digest = " + new String(digest));
        System.out.println("Digest = " + Arrays.toString(digest));
    }
}