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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.lang.reflect.*;
  4. import java.util.*;
  5. import java.util.stream.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone {
  9.   static String simpleTypeName(Type t) {
  10.     if (t instanceof ParameterizedType) {
  11.       ParameterizedType p = (ParameterizedType) t;
  12.       return simpleTypeName(p.getRawType())
  13.           + Stream.of(p.getActualTypeArguments())
  14.               .map(Ideone::simpleTypeName)
  15.               .collect(Collectors.joining(", ", "<", ">"));
  16.     } else if (t instanceof Class) {
  17.       Class<?> c = (Class<?>) t;
  18.       return c.getSimpleName();
  19.     } else {
  20.       throw new AssertionError();
  21.     }
  22.   }
  23.  
  24.   static List<String> list() {
  25.     throw new AssertionError();
  26.   }
  27.  
  28.   public static void main(String[] args) throws java.lang.Exception {
  29.     Method m = Ideone.class.getDeclaredMethod("list");
  30.     System.out.println(simpleTypeName(m.getGenericReturnType()));
  31.   }
  32. }
  33.  
Success #stdin #stdout 0.16s 2184192KB
comments (?)
stdin 
Standard input is empty
stdout 
List<String>
https://ideone.com/6ubXQI
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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