Hello I'm having a problem with dates received from a web service. when I try to call toString: startDate.toString("EE dd, MMM: HH:mm") it throws this exception: java.lang.NullPointerException: ...

// df2 = DateTimeFormatter.ofPattern("ddd,MMMM,yy"); // more than two d causes error // df2 = DateTimeFormatter.ofPattern("ddd,MMMMM,yy"); // more than four M causes ...

DateTimeFormatter class in Java 8 can be used for both of these purposes. Below methods try to provide the solution to these issues.

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When entering a scheduled date like "2025-10-07", even if the number of digits is correct, we do not want to accept dates that do not exist. In this exercise, we will receive a date string and return ...

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