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


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Description

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.

Declaration

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

public static void setDefaultUncaughtExceptionHandler(Thread.UncaughtExceptionHandler eh)

Parameters

  • 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.

Exception

  • SecurityException -- if a security manager is present and it denies RuntimePermission

Example

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

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
   t.start();
   }
}

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

java_lang_thread.htm

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