DES.java

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;

class DesEncrypter {
    Cipher ecipher, dcipher;
    DesEncrypter(SecretKey key) throws Exception {
        ecipher = Cipher.getInstance("DES");
        dcipher = Cipher.getInstance("DES");
        ecipher.init(Cipher.ENCRYPT_MODE, key);
        dcipher.init(Cipher.DECRYPT_MODE, key);
    }
}
public class Main {
    public static void main(String[] argv) throws Exception {
        DesEncrypter encrypter = new DesEncrypter(KeyGenerator.getInstance("DES").generateKey());
        System.out.println(new sun.misc.BASE64Encoder().encode(encrypter.ecipher.doFinal("secret".getBytes("UTF8"))));
        byte[] utf8 = encrypter.dcipher.doFinal(new sun.misc.BASE64Decoder().decodeBuffer(new sun.misc.BASE64Encoder().encode(encrypter.ecipher.doFinal("secret".getBytes("UTF8")))));
        System.out.println(new String(utf8, "UTF8"));
    }
}

|SampleOutput

1k2SZ1ltr2k=
secret