Answers for "list to json in java"

list to json python

import json
friends_list = [
    'John','Rambo','Sam',
]
json_format = json.dumps(friends_list)
print(json_format)
print(type(json_format))
#PYTHON OUTPUT
["John", "Rambo", "Sam"]
<class 'str'>

json array to List in java

List<Employee> list = mapper.readValue(jsonString,
TypeFactory.defaultInstance().constructCollectionType(List.class,  
   Employee.class));

convertir lista a Json en Java

List<String> foo = new ArrayList<String>();
foo.add("A");
foo.add("B");
foo.add("C");

String json = new Gson().toJson(foo );