Question

类MyObject<T>,有个属性List<T> list, 不能用Gson将一个MyObject<User>类型的对象obj转成json的原因是?

代码如下：

public class MyObject<T>{
private List<T> list;
public List<T> getList(){ return list;}
public void setList(List<T> list) {this.list=list;}

}
public class User{
private String id;
private String name;
//.......getters/setters and constructors

}

public class Test{
public static void main(String[] args){
User user1 = new User("1","zhangsan1");
User user2 = new User("1","zhangsan2");
User user3 = new User("1","zhangsan2");
List<User> list = new ArrayList<>();
list.add(user1);
list.add(user2);
list.add(user3);
MyObject<User> obj = new MyObject<>();
obj.setList(list);
Gson gson = new Gson();
String json = gson.toJson(obj);//json 中list不包含任何信息？？？？为什么？？

System.out.println(json);//如果将MyObject的泛型去除，则list包含User的信息？？？？为什么？？

}

}
我自己解决了，方法如下：
最后几行代码改为
Gson gson = new Gson();
Type type = new TypeToken<MyObject<User>>(){}.getType();
String json = gson.toJson(obj,type);
System.out.println(json);

Answer 1

public static void SetPositionX(this Transform tran, float x)
{
tran.position = new Vector3(x, tran.position.y, tran.position.z);
}