JSON and Generics in Java - Type safety warning

Question

I have some data stored in Java elements and I need to return it in a given format - JSONObject. While my implementation works fine, I\'m still getting a warning message fro

Answer 1

What is your JSONObject, does it inherit from HashMap? If does, the warn probably means that your should declare the JSONObject instance as follows:

JSONObject obj=new JSONObject();

Updated: Look at the definition of the JSONObject:

public class JSONObject extends HashMap

it extends HashMap but doesn't support parameter type, if its definition is

public class JSONObject extends HashMap

then we could write

JSONObject obj=new JSONObject();

and the put method will no longer generate the warning