Java: how to convert a List<?> to a Map<String,?> [duplicate]

Answer 1

Using reflection and generics:

public static  Map MapMe(Class clz, Collection list, String methodName)
throws Exception{
  Map map = new HashMap();
  Method method = clz.getMethod(methodName);
  for (T el : list){
    map.put((String)method.invoke(el), el);
  }
  return map;
}

In your documentation, make sure you mention that the return type of the method must be a String. Otherwise, it will throw a ClassCastException when it tries to cast the return value.