import java.util.Base64; String data = "Hello, World!"; String encodedData = Base64.getEncoder().encodeToString(data.getBytes()); System.out.println("Encoded Data: " + encodedData); String encodedData = "SGVsbG8sIFdvcmxkIQ=="; byte[] decodedData = Base64.getDecoder().decode(encodedData); String data = new String(decodedData); System.out.println("Decoded Data: " + data);