问在rum time中拖放java中的jcomponent

EN

public class Customize extends JFrame {

    private JPanel panelSx, panelCx, panelMobile;
    private JButton buttonSave;
    private TabbedPaneComponents tpc;

    public Customize(){
    Container c = getContentPane();
    c.setLayout(new BorderLayout());
    setResizable(true);
    setTitle("Design Preview");
    setSize(800, 650);
    setLocation(250,50);

    panelSx = new JPanel();
    panelSx.setPreferredSize(new Dimension(300, 200));
    panelSx.setOpaque(true);
    panelSx.setBackground(Color.RED.darker());

    panelCx = new JPanel();
    panelCx.setPreferredSize(new Dimension(200, 200));
    panelCx.setOpaque(true);
    panelCx.setBackground(Color.BLUE);

    // display panel
    panelMobile = new JPanel();
    panelMobile.setPreferredSize(new Dimension(300,500));
    panelMobile.setOpaque(true);
    panelMobile.setBackground(Color.PINK.darker());
    panelMobile.setFocusable(false);

    buttonSave = new JButton("Save");

    panelCx.add(panelMobile);

    c.add(panelSx, BorderLayout.WEST);
    c.add(panelCx, BorderLayout.CENTER);

    tpc = new TabbedPaneComponents();
    panelSx.add(tpc);
}


}


public class TabbedPaneComponents extends JTabbedPane{

    private JPanel panel1,panel2,panel3;

    public TabbedPaneComponents(){

    panel1 = new JPanel(); 
    panel1.setPreferredSize(new Dimension(200,300));
    addTab("Form Widgets", panel1); 

    panel1 = new JPanel(); 
    panel1.setPreferredSize(new Dimension(200,300));
    addTab("Text Field", panel2); 

    panel1 = new JPanel(); 
    panel1.setPreferredSize(new Dimension(200,300));
    addTab("Other", panel3); 

    }
}