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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.util.concurrent.Callable;
  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 Exception
  12. 	{
  13. 		RunAndCall<RunnableAndCallable> instance = new RunAndCall<>();
  14. 		instance.invoke(new RunnableAndCallable());
  15. 	}
  16.  
  17. 	public static class RunAndCall<T extends Runnable & Callable<Integer>> {
  18.  
  19. 		public void invoke(T input) throws Exception {
  20. 			input.run();
  21. 			Integer result = input.call();
  22. 			System.out.println(result);
  23. 		}
  24. 	}
  25.  
  26. 	public static class RunnableAndCallable implements Runnable, Callable<Integer> {
  27.  
  28. 		public void run() {
  29. 			System.out.println("I can be run!");
  30. 		}
  31.  
  32. 		public Integer call() {
  33. 			return 12;
  34. 		}
  35. 	}
  36. }
Success #stdin #stdout 0.1s 320512KB
comments (?)
stdin 
Standard input is empty
stdout 
I can be run!
12
https://ideone.com/BaJCBV
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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