import org.apache.commons.codec.binary.Base64; public class Base64Example { public static void main(String[] args) { String originalString = "ABC"; byte[] encodedBytes = Base64.encodeBase64(originalString.getBytes()); String encodedString = new String(encodedBytes); byte[] decodedBytes = Base64.decodeBase64(encodedString.getBytes()); String decodedString = new String(decodedBytes); } }