Long time no see, Java!

It has been 2 years since I came back to Java programming and there are many changes!

After 2 weeks, there are many notes I want to share with you:

Oracle JDK is not free of charge anymore for production.
You can consider some of alternative solutions:
Solution for Circular Dependencies Problem

Problem Encoded password does not look like BCrypt.

Why? StackOverflow topic.
My solution:

String hashedPassword = user.getPassword();
StringBuilder sb = new StringBuilder(hashedPassword);
sb.setCharAt(2, 'a');
final String patchedHashedPassword = sb.toString();
Boolean isMatchedPassword = passwordEncoder.matches(password, patchedHashedPassword);
String hashedPassword = user.getPassword();
StringBuilder sb = new StringBuilder(hashedPassword);
sb.setCharAt(2, 'a');
final String patchedHashedPassword = sb.toString();
Boolean isMatchedPassword = passwordEncoder.matches(password, patchedHashedPassword);

Problem while parsing OAuth2 JSON nested response.
- Why? GitHub Issue.
- My Solution (based on solution from an answer): OAuth2 Access Token Nested Json Response Http Message Converter.

(To be continued…)