title: JPanel said to be opaque what does that mean?
body: <p>In Swing JPanel said to be opaque, what does that mean?</p>
  
  <p>Also how JPanel VS JComponent compared in relation to opaque?</p>
  
  <p>Please explain if possible in simple terms, hence i am not very experienced in GUI programming.</p>
  
  <p>Thanks in advance for your help</p>