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  1. import java.util.ArrayList;
  2. import java.util.List;
  3. import java.util.concurrent.Callable;
  4. import java.util.concurrent.ExecutorService;
  5. import java.util.concurrent.Executors;
  6. import java.util.concurrent.Future;
  7.  
  8. public class Main {
  9.  
  10.     private static final ExecutorService EXECUTOR = Executors.newCachedThreadPool();
  11.  
  12.     private static Callable<String> STAGE_1 = new Callable<String>() {
  13.         @Override
  14.         public String call() throws Exception {
  15.             Thread.sleep(1000);
  16.             return "Step1";
  17.         }
  18.     };
  19.  
  20.     private static class Stage2 implements Callable<String> {
  21.         private final Future<String> step1;
  22.         private final int subType;
  23.  
  24.         public Stage2(Future<String> step1, int subType) {
  25.             this.step1 = step1;
  26.             this.subType = subType;
  27.         }
  28.  
  29.         @Override
  30.         public String call() throws Exception {
  31.             return step1.get() + " " + subType;
  32.         }
  33.     }
  34.  
  35.  
  36.     public static void main(String[] args) throws Exception {
  37.         Future<String> step1Result = EXECUTOR.submit(STAGE_1);
  38.         List<Stage2> list = new ArrayList<Stage2>(5);
  39.         for (int i = 0; i < 5; i++) {
  40.             list.add(new Stage2(step1Result, i));
  41.         }
  42.         List<Future<String>> step2Results = EXECUTOR.invokeAll(list);
  43.         for (Future<String> result : step2Results) {
  44.             System.out.println(result.get());
  45.         }
  46.     }
  47. }
  48.  
Time limit exceeded #stdin #stdout 5s 382144KB
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Standard input is empty
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Step1 0
Step1 1
Step1 2
Step1 3
Step1 4
https://ideone.com/ql0848
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
secret

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