Java concurrent Programming instance--11. Processing of unchecked exceptions in thread groups __java core

The 8th example tells how to catch unchecked exceptions in a thread, and this example describes how to handle unchecked exceptions in a thread group.

Task.java

Package com.dylan.thread.ch1.c11.task;

Import Java.util.Random;

/**
 * Class that implements the concurrent task * */public
Class Task implements Runnable {

	@Overrid E public
	void Run () {
		int result;
		Create a random number generator
		random random=new random (Thread.CurrentThread (). GetId ());
		while (true) {
			//Generate a random number a calculate 1000 divide from that random number
			result=1000/((int) (Rand Om.nextdouble () *1000));
			System.out.printf ("%s:%f\n", Thread.CurrentThread (). GetId (), result);
			Check if the Thread has been interrupted
			if (Thread.CurrentThread (). isinterrupted ()) {
				System.out.printf () %d:interrupted\n ", Thread.CurrentThread (). GetId ());
				return;}}}

Mythreadgroup.java

Package com.dylan.thread.ch1.c11.group;

/**
 * Class that extends the Threadgroup class to implement
 * A uncaught exceptions method 
 *
 /
Public Class Mythreadgroup extends Threadgroup {

	/**
	 * constructor of the class. Calls the parent class constructor
	 * @param name */public
	Mythreadgroup (String name) {
		super (name); c12/>}


	/**
	 * method for process The uncaught exceptions/
	 @Override public
	void  Uncaughtexception (thread T, Throwable e) {
		//prints the name of the thread
		System.out.printf ("The thread%s has Thrown an exception\n ", T.getid ());
		Print the stack trace of the exception
		E.printstacktrace (System.out);
		Interrupt the rest of the threads of the thread group
		System.out.printf ("terminating the rest of the threads\n"); C24/>interrupt ();
	}

Main.java

Package com.dylan.thread.ch1.c11.core;


Import Com.dylan.thread.ch1.c11.group.MyThreadGroup;
Import Com.dylan.thread.ch1.c11.task.Task;

/**
 * Main class of the example
 * * */public
class Main {

	/**
	 * Main method of the example. Creates a group of threads of
	 * Mythreadgroup class and two threads inside this group
	 * @param args
	* * public static void Main (string[] args) {

		//Create a Mythreadgroup object
		mythreadgroup threadgroup=new Mythrea Dgroup ("Mythreadgroup");
		Create a Taks Object
		task task=new task ();
		Create and start two thread objects for this Task for
		(int i=0; i<2; i++) {
			thread t=new thread (threadgroup , task);
			T.start ();}}

Run Result:

10:11:the thread has thrown an Exception
The thread has thrown an Exception
Java.util.illegalformatconversionexception:f!= Java.lang.Integer
At Java.util.formatter$formatspecifier.failconversion (formatter.java:4302)
At Java.util.formatter$formatspecifier.printfloat (formatter.java:2806)
At Java.util.formatter$formatspecifier.print (formatter.java:2753)
At Java.util.Formatter.format (formatter.java:2520)
At Java.io.PrintStream.format (printstream.java:970)
At java.io.PrintStream.printf (printstream.java:871)
At Com.dylan.thread.ch1.c11.task.Task.run (task.java:19)
At Java.lang.Thread.run (thread.java:745)
Java.util.illegalformatconversionexception:f!= Java.lang.Integer
At Java.util.formatter$formatspecifier.failconversion (formatter.java:4302)
At Java.util.formatter$formatspecifier.printfloat (formatter.java:2806)
At Java.util.formatter$formatspecifier.print (formatter.java:2753)
At Java.util.Formatter.format (formatter.java:2520)
At Java.io.PrintStream.format (printstream.java:970)
At java.io.PrintStream.printf (printstream.java:871)
At Com.dylan.thread.ch1.c11.task.Task.run (task.java:19)
At Java.lang.Thread.run (thread.java:745)
Terminating the rest of the Threads
Terminating the rest of the Threads