Java multithreaded Callable,future,futuretask

We are usually exposed to multithreaded thread,runnable, both of which cannot return the results of a thread after execution.

Callable and the future, the former produces results, the latter gets results.

Callable and the future recommend a good blog: http://blog.csdn.net/ghsau/article/details/7451464

 Public classGreystartservletextendsHttpServlet {@Override Public voidInit ()throwsservletexception {Futuretask<String> task =NewFuturetask<string> (NewCallable<string>() {@Override PublicString Call ()throwsException {start ();//using another thread to execute the method avoids the use of Tomcat's boot time     return"Collection completed";     }     }); NewThread (Task). Start (); }  //methods that you want the tomcat to execute after the boot ends  Private Static voidStart ()throwsException {thread.sleep (1000);
}}

Java multithreaded Callable,future,futuretask