Get generic type of class at runtime

Question

How can I achieve this?

public class GenericClass
{
    public Type getMyType()
    {
        //How do I return the type of T?
    }
}

Answer 1

Just in case you use store a variable using the generic type you can easily solve this problem adding a getClassType method as follows:

public class Constant {
  private T value;

  @SuppressWarnings("unchecked")
  public Class getClassType () {
    return ((Class) value.getClass());
  }
}

I use the provided class object later to check if it is an instance of a given class, as follows:

Constant constant = ...;
if (constant.getClassType().equals(Integer.class)) {
    Constant integerConstant = (Constant)constant;
    Integer value = integerConstant.getValue();
    // ...
}