json string to map，int Type conversion Double

[lsm1998]

The cases are as follows：

`
**package test;

import com.google.gson.Gson;
import org.junit.Test;

import java.util.Map;

public class MyTest
{
private Integer id;
private String name;
private float number;

@Test
public void test()
{
    Gson gson=new Gson();

    MyTest test=new MyTest();
    test.number = 3.14f;
    test.id = 10;
    test.name = "lsm";
    System.out.println(gson.toJson(test));

    String str="{\"id\":10,\"name\":\"lsm\",\"number\":3.14}";
    Map map = gson.fromJson(str, Map.class);
    map.forEach((k,v)-> System.out.println(k+" type is"+v.getClass()));
}

}**
`

id type is int，but the print result is Double

[Marcono1234]

Relates to #968 and #1290

[komminen]

Hi, we will volunteer to work on this issue in October/November. For the project maintainer, please let us know if this is okay and if you want it fixed.

[Marcono1234]

I think this is partially resolved now with #1290 being merged. In the next version you can use ToNumberPolicy.LONG_OR_DOUBLE; this should give a long instead of a double as result.
The reporter wants an int, that would require adding a ToNumberPolicy.INT_OR_LONG_OR_DOUBLE (or similar), but I am not sure if that is worth it; the main issue #1290 tried to solve was that an integral JSON number was converted to a double.

Without more context regarding the use case of @lsm1998, the proper solution would be to use gson.fromJson(str, MyTest.class) instead of deserializing it as Map.

@lsm1998, could you please provide a bit more information about why you want to deserialize the data as Map instead of MyTest?

---

Note that I am not a member of this project.

[Marcono1234]

Closing because this is most likely solved (at least to some extent) with the introduction of ToNumberPolicy and the author did not provide more information about their use case.