Java - how to write own custom base64 util?

5 points
Asked by:

Can someone help me to write custom base64 util in java?

Two basic methods:

  • encode string
  • decode string

Without using internal java core methods or external library like apache.

It should be as simple as possible. I would like to learn how to build simple base64.

Thank you.

1 answer
2 points
Answered by:

Check this article:

Code from the article:

import java.util.Base64;

public class Example {

    public static void main(String[] args) {

        String text = "test123";

        // encode
        String encodedString = Base64.getEncoder().encodeToString(text.getBytes());
        System.out.println(encodedString); // dGVzdDEyMw==

        // decode
        String decodedString = new String(Base64.getDecoder().decode(encodedString));
        System.out.println(decodedString); // test123


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