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```java import java.util.Base64; public class Base64Example { public static void main(String[] args) { String originalString = "Hello, World!"; // 編碼 String encodedString = Base64.getEncoder().encodeToString(originalString.getBytes()); System.out.println("Encoded String: " + encodedString); // 解碼 byte[] decodedBytes = Base64.getDecoder().decode(encodedString); String decodedString = new String(decodedBytes); System.out.println("Decoded String: " + decodedString); } } // Encoded String: SGVsbG8sIFdvcmxkIQ== // Decoded String: Hello, World! ```
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