Java IO Error when writing but not when reading

So the problem is I try to read the configuration file that is packed inside the .jar which works fine but then when it comes to writing to the file the file can not be found yet they are using the same

getClass().getResource(Path);

it only seems to work with the input stream.

Here is all the code of my IO class.

package com;

public class IO {

public boolean CheckStream () {
    String LineRead;

    try {

        InputStream IS = getClass().getResourceAsStream("Config.txt");

        InputStreamReader ISR = new InputStreamReader (IS,Charset.forName("UTf-8"));
        BufferedReader BR = new BufferedReader(ISR);

        if ((LineRead = BR.readLine()) != null) {
            BR.close();
            return true;
        }

        IS.close();

    } catch (IOException e) {
        e.printStackTrace();
    }

    return false;
}

public void Write (String Path, String [] ThingsToWrite) throws FileNotFoundException {
    OutputStream Out = new FileOutputStream (getClass().getResource(Path).getPath());
    PrintStream PS = new PrintStream (Out);

    for (int i = 0; i < ThingsToWrite.length; i ++) {
        PS.print(ThingsToWrite[i]);
    }

    PS.close();
}

}

Any Help is greatly appreciated thanks.