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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.lang.reflect.*;
  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. 	private static Method tryFindInterfaceMethod(Method m) throws Exception {
  12. 	    Class dc = m.getDeclaringClass();
  13. 	    for (Class bc : dc.getInterfaces()) {
  14. 	        try {
  15. 		return bc.getMethod(m.getName(), m.getParameterTypes());
  16. 	        } catch (NoSuchMethodException ignore) {
  17. 	        }
  18. 	    }
  19. 	    return m;
  20. 	}
  21. 	public static void main (String[] args) throws java.lang.Exception
  22. 	{
  23.  
  24. Map<String,Object> someMap = new LinkedHashMap<>();
  25. someMap.put("someKey", "someValue");
  26. Map.Entry<String,Object> entry = someMap.entrySet().iterator().next();
  27.  
  28. System.out.println(entry.getValue()); // normal access is fine
  29.  
  30. Method getter = tryFindInterfaceMethod(entry.getClass().getMethod("getValue"));
  31. System.out.println(getter.invoke(entry)); //2 
  32.  
  33.  
  34. 	}
  35. }
Success #stdin #stdout 0.1s 27808KB
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stdin
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Standard input is empty
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someValue
someValue
https://ideone.com/EJGomR
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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