java - Executor.submit not working as expected -

code snippet :

//   mainclass  public class datastreamhandler {         future<string> future =  executor.submit(new jobconsumer());                                 try {                            system.out.println("start future " );             string str = (string) future.get();           } }     //thread class public class jobconsumer implements callable  {    public string call() {       //this logic listens stream , return.       return "jobconsumer done"; } 

here, after listening stream, call() returns.

but main thread prints "start future" without call() finishing. how can make sure "start future" printed after call() done?

do know future.get() , returns?

well, first waits task complete , returns value returned task's call method. in case, future.get() return "jobconsumer done".

after these 2 statements:

system.out.println("start future " ); string str = (string) future.get(); 

you can judge why starts future prints first.