In this source code example, we show you how to encode (Base64) any arbitrary text in Java using the Base64 API that was introduced in Java 8.

Base64 is a binary-to-text encoding scheme that represents binary data in a printable ASCII string format.

Java Base64 Encode Example

import java.io.UnsupportedEncodingException;
import java.nio.charset.StandardCharsets;
import java.util.Base64;

class Base64EncodeExample {

    private static String base64Encode(String value) {
        try {
            return Base64.getEncoder()
                    .encodeToString(value.getBytes(StandardCharsets.UTF_8.toString()));
        } catch(UnsupportedEncodingException ex) {
            throw new RuntimeException(ex);
        }
    }

    public static void main(String[] args) {
        String data = "sourcecode:examples!?$*&()'-=@~";

        String encodedData = base64Encode(data);

        System.out.println("encodedData -> " + encodedData);
    }
}

Output:

encodedData -> c291cmNlY29kZTpleGFtcGxlcyE/JComKCknLT1Afg==

References

https://docs.oracle.com/javase/8/docs/api/java/util/Base64.html