Java.lang.Thread.setDefault UncaughtExceptionHandler() Method Example


The java.lang.Thread.setDefaultUncaughtExceptionHandler() method set the default handler invoked when a thread abruptly terminates due to an uncaught exception, and no other handler has been defined for that thread.


Following is the declaration for java.lang.Thread.setDefaultUncaughtExceptionHandler() method

public static void setDefaultUncaughtExceptionHandler(Thread.UncaughtExceptionHandler eh)


eh − This is the object to use as the default uncaught exception handler. If null then there is no default handler.

Return Value

This method does not return any value.


SecurityException − if a security manager is present and it denies RuntimePermission


The following example shows the usage of java.lang.Thread.setDefaultUncaughtExceptionHandler() method.

Live Demo
package com.tutorialspoint;

import java.lang.*;

public class ThreadDemo {

   public static void main(String[] args) {
      Thread t = new Thread(new adminThread());
      t.setDefaultUncaughtExceptionHandler(new Thread.
      UncaughtExceptionHandler() {
         public void uncaughtException(Thread t, Throwable e) {
            System.out.println(t + " throws exception: " + e);
      // this will call run() function

class adminThread implements Runnable {

   public void run() {
      throw new RuntimeException();

Let us compile and run the above program, this will produce the following result −

Thread[Thread-0,5,main] throws exception: java.lang.RuntimeException