Java JFrame not showing in ouput when InternalFrames are added

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Guys! I have created a multipage image quiz in Java InternalFrames. I have instantiated the InternalFrame Class and added that to a JFrame. Although, I am not able to see any output. I am a rookie in Java and I am not able to find any resources to solve this issue. Below is the main function code.

    public static void main(String[] args) throws ClassNotFoundException, SQLException {    
        JFrame frame = new JFrame();
        JDesktopPane desktop = new JDesktopPane();
        CSYTest obj = new CSYTest("Nainoor");
        obj.setVisible(true);
        desktop.add(obj);
        frame.setContentPane(desktop);
        obj.setVisible(true);
        obj.setSize(new Dimension(300, 200));               
    }

My program gets terminated as soon as it runs. Java SE - 1.7

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