How do you exit an application :) very simple question

Question

Hi Everyone
how do you exit an application.
For example let's say I had something like this
public class MyClass implements Runnable{
public static void main(String[] ar){
MyClass mc = new MyClass();
Thread t = new Thread(mc);
t.start();
public MyClass(){
get a file
but if the file is not found Exit the application
public void run(){
while(true){
// do something interesting that depends on the properties of that file
now I can make the try catch(FileNotFoundException e ) block in constructor . I can return from the constructor BUT public static main(String[] arg) will continue to execute and start the new thread .
So the application will enter the run() method and throw some errors.
I know i could simply set a variable in the catch block and test it to determine if the various methods will return but that doesn't seem reasonable --- anyone have a suggestion -- especially if I have lot's of classes and threads working at the same time
thanks
stev
In the catch block
}

Answer 1

thank you. both of those answers sound great.
it seems that I should actually understand the correct use of the constructor.
Perhaps the constructor should just be used to set variable names -- and not to perform so many actions like loading property files .
it seems like loading property files can better organized and implemented as a separate method which is called by the run method.
When the exception is thrown then i think i can more gracefully exit the application in the run method. And this solution can be used for classes that extend Thread and classes that call start() from the outside of the class
stev