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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.util.concurrent.*;
  5. import java.lang.*;
  6. import java.io.*;
  7.  
  8. /* Name of the class has to be "Main" only if the class is public. */
  9. class Ideone
  10. {
  11. 	public static void main (String[] args) throws java.lang.Exception
  12. 	{
  13. 		Ideone obj = new Ideone();
  14. 		Future<Integer> res = obj.doCallable();
  15. 		System.out.println(res.get());
  16. 	}
  17. 	public Future<Integer> calculate(Integer input) {
  18. 		ExecutorService executor = Executors.newFixedThreadPool(1);
  19.         return executor.submit(() -> {
  20.         	long start = System.currentTimeMillis();
  21.             Thread.sleep(2000);
  22.             System.out.println("Sleep time in ms = "+(System.currentTimeMillis()-start));
  23.             return input * input;
  24.         });
  25.     }
  26.     public Future<Integer> doCallable() {
  27.     	int value = 99;
  28. 		try {
  29. 			Callable<Future> callable = () -> calculate(value);
  30. 			Future<Integer> future = callable.call();
  31. 			return future;
  32. 		} catch (final Exception e) {
  33. 			e.printStackTrace();
  34. 			throw new RuntimeException(e);
  35. 		}
  36.     }
  37. }
Time limit exceeded #stdin #stdout 5s 33684KB
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Standard input is empty
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Sleep time in ms = 2001
9801
https://ideone.com/NcL0YV
language:
Java (12.0.1)
created:
8 years ago
visibility:
public

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