Call Docx From Source Folder To Open In Microsoft Word?

I created a src folder called doc within my jar, and have several word documents stored there. When a button is clicked I request a document from this src folder to be opened in Microsoft Word. Right now I am using the following code:

JButton btnUn3E1 = new JButton("Unit 3 Ex 1");
btnUn3E1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Desktop desktop = Desktop.getDesktop();
try{
File f = new File("docs/UNIT 3 EX 1.docx");
desktop.open(f);
}
catch(Exception ex){
}
}
});

When my program is run within the ide, all works well, but when compiled and converted to .exe it doesn't work. I have also tried the complete file path and still a no go.