Compile Java File: ExecutorCallableExample1

import java.util.ArrayList;  
    import java.util.Date;  
    import java.util.List;  
    import java.util.concurrent.Callable;  
    import java.util.concurrent.ExecutionException;  
    import java.util.concurrent.ExecutorService;  
    import java.util.concurrent.Executors;  
    import java.util.concurrent.Future;  
      
    public class ExecutorCallableExample1 implements Callable<String> {  
      
        @Override  
        public String call() throws Exception {  
            Thread.sleep(1000);  
            return Thread.currentThread().getName();  
        }  
          
        public static void main(String args[]){  
      
            ExecutorService executor = Executors.newFixedThreadPool(20);  
            List<Future<String>> list = new ArrayList<Future<String>>();  
            Callable<String> callable = new ExecutorCallableExample1();  
      
            for(int i=0; i< 10; i++){  
                Future<String> ftr = executor.submit(callable);  
                list.add(ftr);  
            }  
            for(Future<String> fut : list){  
                try {  
                    System.out.println(new Date()+ "::"+fut.get());  
      
                } catch (InterruptedException | ExecutionException e) {  
                    e.printStackTrace();  
                }  
            }  
            executor.shutdown();  
        }  
      
    }

Output

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