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POCan't stop ExecutorService in java
 

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    <p>I have a problem with ExecutorService. I have a button in GUI that calls Runnable class that contains ExecutorService. I tried everything to stop ExecutorService (or main thread) but I didn't find a way to end it. Here is my code. Please post your answers and advises. Best regards.</p> <pre><code>public void actionPerformed(ActionEvent e) { final FindGateWaysAndIps scanner = new FindGateWaysAndIps(); if (e.getActionCommand()=="Start Scan"){ scanner.start(); } if (e.getActionCommand()=="Stop Scan"){ scanner.interrupt(); scanner.stopScans(); } } </code></pre> <p>Class "FindGateWaysAndIps"</p> <pre><code>String ip = "192.168."; String sql =" "; static volatile boolean stop = false; PingResult AllResaults = new PingResult(); int [] AllGateWays = new int [256]; final int NUM_THREADS = Runtime.getRuntime().availableProcessors(); ExecutorService exec = Executors.newFixedThreadPool(NUM_THREADS*5); public void run() { stop=true; while(stop){ for (;GateWayKey&lt;=GateWayKeyStop;GateWayKey++){ if (!stop){ exec.shutdownNow(); Thread.currentThread().interrupt(); break; } ip="192.168."+GateWayKey+".1"; AllSQLs.add(exec.submit((new PingTask(ip,GateWayKey,true)))); } if (!stop) { exec.shutdownNow(); Thread.currentThread().interrupt(); break; } AllGateWays=GetVectorData.GiveMeGateWays(); for (int j=0; j&lt;= AllGateWays.length;j++){ System.out.println("stop je: "+stop); if (!stop){ exec.shutdownNow(); Thread.currentThread().interrupt(); break; } removeDuplicateinVectors(); //System.out.println("Sada je j"+j); for (;SubNetKey&lt;=SubNetKeyStop;SubNetKey++){ if (!stop){ exec.shutdownNow(); Thread.currentThread().interrupt(); break; } ip="192.168."+AllGateWays[j]+"."+SubNetKey; AllSQLs.add (exec.submit((new PingTask(ip,AllGateWays[j],false)))); } // Process the result here (this is where you insert into the DB) //WriteAllDataIntoDataBase(); } exec.shutdown(); //WriteAllDataIntoDataBase(); } public void stopScans(){ exec.shutdownNow(); stop=false; } </code></pre> <p>Sorry here is PingTask class</p> <pre><code>public class PingTask implements Callable &lt;String&gt; { String ips; String sql; PingResult PassDataToExternalClass = new PingResult(); //FindGateWaysAndIps DataProccesor = new FindGateWaysAndIps(); int GateWay; ScanFrame MonitorData = new ScanFrame(); boolean GateWayORSubNet; int [] AllGateWays = new int [256]; int i=0; public int[] GiveMeGateWays(){ return AllGateWays; } public PingTask (){ } public PingTask (String ip, int GateWayKey, boolean GateWayORSubNets){ ips=ip; GateWay=GateWayKey; GateWayORSubNet=GateWayORSubNets; } public String call(){ InetAddress address; try { address = InetAddress.getByName(ips);//ako nade gateway neka skoci u petlju u kojoj nade IP adrese pripadajuceg gatewaya System.out.println("PINGAM: "+ips); try { if (address.isReachable(2000)) { //pinga gatewaya s 1000ms (jeli je moguce ovo smanjiti da se ubrza proces)? System.out.println("Nasa sam IP: "+ips); AllGateWays[i]=GateWay; i++; MonitorData.WriteMonitorData(ips,address.getHostName().toString(),"2000","da"); if (GateWayORSubNet){ sql="REPLACE INTO `gateways` (`ID_GATEWAY` , `GATEWAY_IP` , `GATEWAY_NAME`) VALUES ('"+GateWay+"', '"+ips+"', '"+address.getHostName().toString()+"');"; return sql; } else{ sql="REPLACE INTO `subnets` (`IP` , `COMPUTER_NAME` , `GATEWAY_KEY`) VALUES ('"+ips+"', '"+address.getHostName().toString()+"', '"+GateWay+"');"; return sql; } } else { return ";"; } } catch (IOException e) { return ";"; } } catch (UnknownHostException e) { return ";"; } } } </code></pre>
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