Handling unexpected runtime exception inside Thread. thread.setUncaughtExceptionHandler

Create and set UncaughtExceptionHandler before starting new thread to catch unexpected runtime exception in Multithreading application.

package demo;

public class ExceptionHandler {

    public static void main(String[] args) {

        Thread thread = new Thread(new Runnable() {

            @Override

            public void run() {

                throw new RuntimeException("Critical Error");

            }

        });

        System.out.println("Starting new thread " + Thread.currentThread().getName());

        //Throw this exception if any exception has occurred inside running thread but was not caught anywhere else

        //This should be set before starting the new thread

        thread.setUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {

            @Override

            public void uncaughtException(Thread thread, Throwable throwable) {

                System.out.println("Error occurred on thread: " + thread.getName() + ". Reason : " + throwable.getMessage());

            }

        });

        thread.setName("Bad Thread");

        thread.start();

    }

}