Compile Java File: ExecutorCallableExample2

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 ExecutorCallableExample2 implements Callable<String> {  
      
        @Override  
        public String call() throws Exception {  
            Thread.sleep(500);  
            return Thread.currentThread().getName();  
        }     
        public static void main(String args[]){  
      
            ExecutorService executor = Executors.newFixedThreadPool(20);  
            List<Future<String>> lst = new ArrayList<Future<String>>();  
            Callable<String> clbl = new ExecutorCallableExample1();  
               int i =0;
            while( i < 5){  
                Future<String> ftr = executor.submit(clbl);  
                lst.add(ftr);
                i++;
            }  
            for(Future<String> fut : lst){  
                try {  
                    System.out.println( "::"+fut.get());  
      
                } catch (InterruptedException | ExecutionException e) {  
                    e.printStackTrace();  
                }  
            }  
            executor.shutdown();  
        }  
      
    }

Output

Online Java Compiler By JavaTpoint.com