Thread: How to use the same instance of an object in two methods

My issue is that in my code, I create a new JFrame object called frame. In another method I want to close that frame. Any suggestions?

// Non-relevant code
private static class oddbutton implements ActionListener{
    public void actionPerformed(ActionEvent e) {
 
 
      }
}
//More Non-relevant code
 public void run(){
        NewGame.setoddnumber();
        NewGame.setevennumber();
        NewGame.separate();
        JFrame frame = new JFrame("Button Game!");
              addComponentsToPane(frame.getContentPane());
                 Insets insets = frame.getInsets();
        frame.setSize(200, 300);
        frame.setVisible(true);
    }

As of now, I have nothing in my oddbutton class. I don't know how to close the frame.