I have the following class structure:
public Class A{
private int a;
private String b;
private B binst;
}
public Class B{
private int x;
private String y;
}
All the getters and setters are defined. I use Java reflection to invoke as follows :
method.invoke(ClassAObj, ClassBObj);
Now, before invoking this, I had only set y
and not x
. I convert this ClassAObj into JSON and find that the default value of 0
is set for x
, and it appears in the JSON. I don't want x
field to appear in the JSON. How should I avoid this?
Interestingly, if I set x
and not y
, the tag y
doesn't appear in the JSON.
Because int
is a primitive, ie: not nullable, and usually Json
parsers discard null values. You can use the reference
type Integer
and its default will be null
.
public Class B{
private Integer x;
private String y;
}
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