How to save object to url

I want to save some objects from my program. I have the url (getClass().getResource("resources/state.ser")) but can't find how to create a writer from a url that can write an object.

Ruskin wrote:
I want to save some objects from my program. I have the url (getClass().getResource("resources/state.ser")) but can't find how to create a writer from a url that can write an object.If the resource is in a Jar you're out of luck. It cannot be written.
The general approach is to..
1) If the resource exists at a known path(a) use that resource path. If not, get the URL from the Jar, read the bytes, and store it at the known path.
2) Gain a File object to the resource on the known path.
3) Get an InputStream to read from the File object.
4) Get an OutputStream to write to the File object.
a) Something like ${user.home}/com/your/resources/state.ser
There are other options that can be used for sand-boxed code. Depending on the contents of the ser (is that a serialised object?) you might write the data to other places than a file.
BTW - these questions are much more easily and better answered if you can put aside what you are trying to do, and instead tell us what you are trying to achieve. An example of the latter is "I want to offer the end user the program ability to save/restore the application state between runs".

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