Question

I have a threadpool executor with several threads which are running concurrently. I want to execute some code after all threads have completed. How can I achieve this?

      for(String x : mList){
        mExecutor.execute(new Runnable(){

            @Override
            public void run() {
                //Do Stuff
                            }

        });

       //after all threads finish
       doOtherStuff();

Answer 1

This should achieve what you need:

for(String x : mList) {
   mExecutor.execute(new Runnable() {    
        @Override
        public void run() {
            //Do Stuff
        }    
   });
 }

 mExecutor.shutdown();
 mExecutor.awaitTermination(Long.MAX_VALUE, TimeUnit.DAYS);

 //after all threads finish
 doOtherStuff();