Saving an Object array to a file

Wow, this has been tough!

There are companies where the use of the ternary operator in code is explicitly forbidden. I read it in an article written by a computer science teacher, who used to work as a developer for several software companies. Ternary is hard to understand, it makes difficult to review the code. And it's a very important aspect.

A hint for the ones about to start wokring on these tasks: have a look at Java Properties class

These were exceedingly hard to do. I would suggest that before anyone even tries them that you read all of the various comments and questions and answers for each task. I think a major part of why these are so hard is that they are not explained well. I find it all but impossible to figure out what it is they are looking for. The Conditions are so unclear, even to the point of being obtuse.

This has got exceedingly more difficult in a very short space of lessons. Enjoying it but have nearly thrown my mouse across the room on a couple occasions lol.

Objects.equals(o1, o2.param);

does anyone find this code a little odd? as if it was done backward!!! if (name != null ? !name.equals(human.name) : human.name != null) return false;

Help for : Stranger things 1. Look at the equals() and the hashCode() methods. 2. Try to understand what they do. 3. If you dont understand (like me) than look at the same methods in the previous 4 Tasks. Basically it should be almost the same code. 4. (Optional) If you found the errors, try to understand the code again.

Hard exercises, but most of all, some don´t make sense to me ;o(

Tip for the CodeGym task: The requirements are VERY HAZY. (1) In the SAVE, they want you to firstly check if there's anything in the users LIST. Only save if : if (!users.isEmpty()) { all your save code } (2) Before saving it, save the first line as the size of the users LIST outputStream.write(String.valueOf(users.size()).getBytes()); Also read this, to know how many times to load it, in the LOAD method (3)Then, for each field, save to lines. Line 1 = whether the field is null or not, Line 2 is the field value itself. (4) Remember to flush() when exiting your SAVE loop (for some stupid reason. Don't understand why the write in ANY language would need a flush afterwards. It's not supposed to be a toilet. When you READ/LOAD, do the same: Each statement that reads a value, should first read the line that says if the value is null or not (that you saved). Then after that, read the line after, which has the value, and set your user object's value by calling the corresponding method in User class. Remember to close the reader. This was not a very clear or nice task, to say the very least. I really enjoyed the course up to this level. This level can be improved a lot, but let's move on!

The 2002 task took me so much time. Ill give you a hint. If you want to convert a date.toString() to date, use this. Date date = new Date(); String s = date.toString(); DateTimeFormatter dtf = DateTimeFormatter.ofPattern("EEE MMM dd HH:mm:ss zzz yyyy", Locale.ROOT); Date birthDay = Date.from(ZonedDateTime.parse(s, dtf).toInstant()); Good luck ;)

                    printWriter.println(user.getBirthDate().getTime());
...
 user.setBirthDate(new Date(Long.parseLong(bufferedReader.readLine())));