import java.util.Arrays;
import java.util.List;

public class Display
{

    protected List<String> nameList = Arrays.asList("Peter","Juli","Dave");

    public List<String> getNameList()
    {
        return this.nameList;
    }
}

import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

/**
 * How to get Generic return Type of the method
 */
public class ReflectionDemo
{
    public static void main(String[] args)
    {
        try
        {
            Class<Display> classObj = Display.class;
            Method method = classObj.getMethod("getNameList", null);
            Type type = method.getGenericReturnType();
            System.out.println("type = "+type);

            if (type instanceof ParameterizedType)
            {
                ParameterizedType parameterizedType = (ParameterizedType) type;
                Type[] typeArguments = parameterizedType.getActualTypeArguments();
                for (Type typeArgument : typeArguments)
                {
                    Class typeArgClass = (Class) typeArgument;
                    System.out.println("typeArgClass = " + typeArgClass);
                    System.out.println("typeArgClass Name = " + typeArgClass.getName());
                }
            }
        }
        catch (NoSuchMethodException | SecurityException e)
        {
            e.printStackTrace();
        }

    }

}

type = java.util.List<java.lang.String>
typeArgClass = class java.lang.String
typeArgClass Name = java.lang.String