public void mainMenu()
    {
        JPanel menuDisplay=new JPanel();
        menuDisplay.setLayout(new BoxLayout(menuDisplay,BoxLayout.Y_AXIS));
        menuDisplay.setBackground(Color.white);

        JLabel menuTitle=new JLabel("Property Rental Appliance Inventory");
        menuTitle.setAlignmentX(Component.CENTER_ALIGNMENT);
        menuTitle.setFont(new Font("Calibre", Font.BOLD, 45));

        JLabel subTitle=new JLabel("Main Menu");
        subTitle.setAlignmentX(Component.CENTER_ALIGNMENT);
        subTitle.setFont(new Font("Calibre", Font.BOLD, 30));

        int buttonSizeHeight=70;
        int buttonSizeWidth=400;
        int buttonFontSize=25;

        JButton navByLoc=new JButton("Navigate By Location");
        navByLoc.setAlignmentX(Component.CENTER_ALIGNMENT);
        navByLoc.setFont(new Font("Title", Font.BOLD, buttonFontSize));
        size(navByLoc,buttonSizeWidth,buttonSizeHeight);

        JButton advSearch=new JButton("Advanced Search");
        advSearch.setAlignmentX(Component.CENTER_ALIGNMENT);
        advSearch.setFont(new Font("Title", Font.BOLD, buttonFontSize));
        size(advSearch,buttonSizeWidth,buttonSizeHeight);

        JButton genStats=new JButton("General Statistics");
        genStats.setAlignmentX(Component.CENTER_ALIGNMENT);
        genStats.setFont(new Font("Title", Font.BOLD, buttonFontSize));
        size(genStats,buttonSizeWidth,buttonSizeHeight);

        JButton backOpt=new JButton("Backup Options");
        backOpt.setAlignmentX(Component.CENTER_ALIGNMENT);
        backOpt.setFont(new Font("Title", Font.BOLD, buttonFontSize));
        size(backOpt,buttonSizeWidth,buttonSizeHeight);

        fill(menuDisplay,15);
        menuDisplay.add(Box.createVerticalGlue());
        menuDisplay.add(menuTitle);
        fill(menuDisplay,10);
        menuDisplay.add(subTitle);
        fill(menuDisplay,40);
        menuDisplay.add(navByLoc);
        fill(menuDisplay,80);
        menuDisplay.add(advSearch);
        fill(menuDisplay,80);
        menuDisplay.add(genStats);
        fill(menuDisplay,80);
        menuDisplay.add(backOpt);
        fill(menuDisplay,200);

        mainFrame.add(menuDisplay,BorderLayout.NORTH);
        showFrame();
    }

public void fill(JPanel k, int x) //creates a vertical fill space for box layout
    {
        k.add(Box.createRigidArea(new Dimension(1, x)));
    }