multithreading - Having Some Problems with Threads on Java -

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I've got this program of computing the primary numbers. When the stoppage is stopped, the program stops computing the major numbers, but when I go and press, I need the program to continue its computation, but I did not know that I myself How can I start yarn again? I tried to make it a new example but nothing happened here: My code is: 

  PublicApp PrimeApp1 JFrame {JTextArea Output Protected; Protected pocket go; Protected Jebton Stop; Secured counter = 2; Protected boolean stop computation = false; Public boolean run = true; Protected Boolean isPrime (long number) {long max = (long) Math.sqrt (number) + 1; (Long I = 2; i   
}   
 
 
 I think your problem is That you are trying to start a thread that has already finished the process. You can start only one thread at a time, see for details.  
 Instead of going action to start the thread in the audience, you may want to create a new thread object that Akshnlistnr and start it  
 something like this:  
  go.addActionListener (new Akshnlistr) (public void action executed (ActionEvent e) {PrintPrimes print = new Printprims (); print.start ();}});   
 Instead of creating the last thread object in your constructor.

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