putting a Date into a JSONObject about json-simple HOT 4 CLOSED

Here's the mapping between JSON and Java entities:
http://code.google.com/p/json-simple/wiki/MappingBetweenJSONAndJavaEntities

Basically, you need to follow the mapping to get valid JSON strings.

I disagree with the current behaviour. The library should either automatically 
quote
what toString() returns or not accept unrecognized objects at all. Silently 
producing
broken JSON is the worst option of all IMHO.

writeJSONString(Object) writing an unquoted toString() is a disaster.  I agree 
with martin, silently producing broken JSON is the worst option, and the 
default behavior.