JSlider on Applet

Hello,

 

public void init() {
      Container content = getContentPane();
      content.setBackground(Color.white);
    content.setLayout(new BorderLayout());
    JPanel panel = new JPanel();
 panel.add(textField);
  //  panel.add(slider);
    panel.setBackground(Color.white);
    addButtons(panel);
    panel.add(stepButton);
    panel.add(resetButton);
    panel.add(slider);
    add(panel, "North");
}

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  I'm trying to add a JSlider component to java applet. Its not visible on load . when I click on the component its visible again. I tried everything.

I have a background color for the panel which is not visible.
I'm attaching the snaps and code . The class extends JApplet

-Abhi