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/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		SomeObjectType result;
		String urlString;
		// works
		Type returnType = new TypeToken<SomeObjectType>() {
		}.getType();
		result = (SomeObjectType) Utils.urlToGson(urlString,returnType);
 
		// fails, unable to cast someInternalListType to SomeObjectType
		result =  Utils.urlToGson(urlString);
	}
 
	public static <T> T urlToGson(String urlString) {
		CloseableHttpClient httpclient = HttpClients.createDefault();
			HttpGet httpGet = new HttpGet(urlString);
			CloseableHttpResponse response1 = httpclient.execute(httpGet);
 
				Type returnType = new TypeToken<T>() {
				}.getType();
 
				HttpEntity entity1 = response1.getEntity();
 
				Gson gson = new Gson(); // Or use new GsonBuilder().create();
				return (T)gson.fromJson(EntityUtils.toString(entity1), returnType); // deserializes
	}
 
	public static Object urlToGson(String urlString, Type returnType) {
		CloseableHttpClient httpclient = HttpClients.createDefault();
			HttpGet httpGet = new HttpGet(urlString);
			CloseableHttpResponse response1 = httpclient.execute(httpGet);
				HttpEntity entity1 = response1.getEntity();
 
				Gson gson = new Gson(); // Or use new GsonBuilder().create();
				return gson.fromJson(EntityUtils.toString(entity1), returnType); // deserializes
	}
 
}

Main.java:7: error: package com.google.gson does not exist
import com.google.gson.Gson;
                      ^
Main.java:8: error: package com.google.gson.reflect does not exist
import com.google.gson.reflect.TypeToken;
                              ^
Main.java:39: error: cannot find symbol
	public static Object urlToGson(String urlString, Type returnType) {
	                                                 ^
  symbol:   class Type
  location: class Ideone
Main.java:14: error: cannot find symbol
		SomeObjectType result;
		^
  symbol:   class SomeObjectType
  location: class Ideone
Main.java:17: error: cannot find symbol
		Type returnType = new TypeToken<SomeObjectType>() {
		^
  symbol:   class Type
  location: class Ideone
Main.java:17: error: cannot find symbol
		Type returnType = new TypeToken<SomeObjectType>() {
		                      ^
  symbol:   class TypeToken
  location: class Ideone
Main.java:17: error: cannot find symbol
		Type returnType = new TypeToken<SomeObjectType>() {
		                                ^
  symbol:   class SomeObjectType
  location: class Ideone
Main.java:19: error: cannot find symbol
		result = (SomeObjectType) Utils.urlToGson(urlString,returnType);
		          ^
  symbol:   class SomeObjectType
  location: class Ideone
Main.java:19: error: cannot find symbol
		result = (SomeObjectType) Utils.urlToGson(urlString,returnType);
		                          ^
  symbol:   variable Utils
  location: class Ideone
Main.java:22: error: cannot find symbol
		result =  Utils.urlToGson(urlString);
		          ^
  symbol:   variable Utils
  location: class Ideone
Main.java:26: error: cannot find symbol
		CloseableHttpClient httpclient = HttpClients.createDefault();
		^
  symbol:   class CloseableHttpClient
  location: class Ideone
Main.java:26: error: cannot find symbol
		CloseableHttpClient httpclient = HttpClients.createDefault();
		                                 ^
  symbol:   variable HttpClients
  location: class Ideone
Main.java:27: error: cannot find symbol
			HttpGet httpGet = new HttpGet(urlString);
			^
  symbol:   class HttpGet
  location: class Ideone
Main.java:27: error: cannot find symbol
			HttpGet httpGet = new HttpGet(urlString);
			                      ^
  symbol:   class HttpGet
  location: class Ideone
Main.java:28: error: cannot find symbol
			CloseableHttpResponse response1 = httpclient.execute(httpGet);
			^
  symbol:   class CloseableHttpResponse
  location: class Ideone
Main.java:30: error: cannot find symbol
				Type returnType = new TypeToken<T>() {
				^
  symbol:   class Type
  location: class Ideone
Main.java:30: error: cannot find symbol
				Type returnType = new TypeToken<T>() {
				                      ^
  symbol:   class TypeToken
  location: class Ideone
Main.java:33: error: cannot find symbol
				HttpEntity entity1 = response1.getEntity();
				^
  symbol:   class HttpEntity
  location: class Ideone
Main.java:35: error: cannot find symbol
				Gson gson = new Gson(); // Or use new GsonBuilder().create();
				^
  symbol:   class Gson
  location: class Ideone
Main.java:35: error: cannot find symbol
				Gson gson = new Gson(); // Or use new GsonBuilder().create();
				                ^
  symbol:   class Gson
  location: class Ideone
Main.java:36: error: cannot find symbol
				return (T)gson.fromJson(EntityUtils.toString(entity1), returnType); // deserializes
				                        ^
  symbol:   variable EntityUtils
  location: class Ideone
Main.java:40: error: cannot find symbol
		CloseableHttpClient httpclient = HttpClients.createDefault();
		^
  symbol:   class CloseableHttpClient
  location: class Ideone
Main.java:40: error: cannot find symbol
		CloseableHttpClient httpclient = HttpClients.createDefault();
		                                 ^
  symbol:   variable HttpClients
  location: class Ideone
Main.java:41: error: cannot find symbol
			HttpGet httpGet = new HttpGet(urlString);
			^
  symbol:   class HttpGet
  location: class Ideone
Main.java:41: error: cannot find symbol
			HttpGet httpGet = new HttpGet(urlString);
			                      ^
  symbol:   class HttpGet
  location: class Ideone
Main.java:42: error: cannot find symbol
			CloseableHttpResponse response1 = httpclient.execute(httpGet);
			^
  symbol:   class CloseableHttpResponse
  location: class Ideone
Main.java:43: error: cannot find symbol
				HttpEntity entity1 = response1.getEntity();
				^
  symbol:   class HttpEntity
  location: class Ideone
Main.java:45: error: cannot find symbol
				Gson gson = new Gson(); // Or use new GsonBuilder().create();
				^
  symbol:   class Gson
  location: class Ideone
Main.java:45: error: cannot find symbol
				Gson gson = new Gson(); // Or use new GsonBuilder().create();
				                ^
  symbol:   class Gson
  location: class Ideone
Main.java:46: error: cannot find symbol
				return gson.fromJson(EntityUtils.toString(entity1), returnType); // deserializes
				                     ^
  symbol:   variable EntityUtils
  location: class Ideone
30 errors

Standard output is empty