I am using threading in my code and initializing it inside a while loop.
it executed successfully for 31 iterations, however after that for 5 remaining iterations it throws null pointer exception.

Consider the below code:-

This question does not account for Java21 virtual threads.
Yo guys, are the following assumptions true? >>

I am learning about threads in Java and trying to understand what wait() does.

I hope getting helped, because I have been trying to understand this program for 3 days. The essence of the program is the implementation of methods for pausing, resuming and stopping the flow. Code taken from Herbert Schildt’s Beginner’s Book, 9th Edition. Chapter 12. I didn’t write it exactly, but I think the essence is clear.

I have a tomcat instance with a Spring web application.
It starts a scheduled job with this code:

Problem: Use Multithreading to create two threads ‘Fibonacci’ and ‘prime’. ‘Fibonacci’ thread will display the series for n terms with 6000ms delay. And ‘prime’ thread will display prime numbers in a given range with 3000ms delay.

I’m learning java and wrote a recursive function search to find the best move in a simple board game for one player using brute force.

As far as I know, Threads share all of the memory segment except for stack. Let’s look example of this code.

I couldn’t find the right answer for my question.
I have a webservice that create an object and return its ID to a user but I would like to do another thing after the return statement.
I have used a new thread but due to that my function takes time, at first return statement is called, as a result the new thread (firstThread) never finishes! I appreciate any advice.
I don’t want to use join() for my thread because it will stop user from getting result from webservice until my job is done!
here are sample code: