# 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:

  • Oracle OpenJDK.
  • AdoptOpen JDK.
  • Azul Zulu.

• 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);
  

• 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...)