Gson.toJson not converting boolean values from object - json

Question

Google's Gson.toJson(Object src) not converting boolean values.
For example, My Java object is say:
class MyObj {
private String name;
private boolean teen;
//getter,setter ommitted...
}
MyObj obj = new MyObj();
obj.setName("Me");
obj.isTeen(false);
Gson.toJson(obj);
While converting this object it's writing like this
MyObj { "name" : "Me" }
boolean is missing even though there was a value.

Answer 1

Gson doesn't serialize the fields only if the field is defined as transient or static.
If you haven't defined the boolean field as static or transient, json should have that field.
I am not sure how you are setting the value to boolean field using isTeen() method. It should give compilation error unless you have non-trivial "is" method for boolean field. The "is" method is basically an equivalent of "get" method for String/other fields. Typically, it won't be used to set the value.
I have just provided the full code with getters and setters. Please check whether this works.
public class MyObj {
private String name;
private boolean teen;
public String getName() {
return name;
}
public boolean isTeen() {
return teen;
}
public void setName(String name) {
this.name = name;
}
public void setTeen(boolean teen) {
this.teen = teen;
}
}
Main Method:-
public static void main(String[] args) {
Gson gson = new Gson();
MyObj obj = new MyObj();
obj.setName("Me");
obj.setTeen(false);
System.out.println(gson.toJson(obj));
}
Output:-
{"name":"Me","teen":false}
The interesting point is that even if you don't set any value for boolean field. It will take the default as false and the generated JSON will have false.