What is Thread getUncaughtExceptionHandler() in Java?

The Thread.getUncaughtExceptionHandler() function from the java.lang.Thread class is used to return the handler. It is invoked when the thread is terminated because of an uncaught exception.

It is used for exception handling in threads.

Syntax

Thread.UncaughtExceptionHandler getUncuaghtExceptionHandler()

Parameters

This function does not take any argument values.

Return value

Thread.UncaughtExceptionHandler: This function returns an object of the UncaughtExceptionHandler type.

Example

We can understand the working of Thread.getUncaughtExceptionHandler() through the following code.

// Load library
import java.lang.Thread;
public class Thread_example implements Runnable {
   Thread thrd;
   public Thread_example() {
      thrd = new Thread(this);
      // calling run() method
      thrd.start();
   }
   public void run() {
      // printing the name of thread
      System.out.println("Thread :" + thrd.getName());
      /* will return the handler invoked when the thread is stopped because of an uncaught exception. */
      Thread.UncaughtExceptionHandler handler = 
      thrd.getUncaughtExceptionHandler();
      System.out.println(handler);
   }
   public static void main(String[] args) {
      new Thread_example();
      new Thread_example();
   }
}

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