Can we make the main() thread a daemon thread?

 No, the main thread in Java cannot be made a daemon thread. A daemon thread is a thread that runs in the background and does not prevent the JVM from exiting. Daemon threads are typically used to perform tasks such as cleaning up resources or performing other maintenance tasks.

The main thread is the thread that is created when the program starts and is responsible for executing the main method. It is not possible to make the main thread a daemon thread because the JVM will not exit as long as the main thread is still running.

If you want to create a daemon thread in your Java program, you can use the setDaemon method of the Thread class to mark the thread as a daemon thread. For example:

Thread t = new Thread(new Runnable() { public void run() { // code for the thread goes here } }); t.setDaemon(true); t.start();

This will create a new daemon thread that will run in the background. However, the main thread will still be a non-daemon thread and will continue to run until the program completes.