title: Java swing radioButton with changing, clickable icon
body: <p>Designing a questionary, the scope of answer can be elected by radioButtons.
  To display a greater clickable area (the application is for touchscreen), I layed icon_1  over the radiobuttons.</p>
  
  <p>Every mouseclick can change the displayed icon to icon_2  and permantly vice versa.
  I am sorry, using </p>
  
  <pre><code>jRadioButtonActionPerformed 
  ImageIcon o_ButtonIcon = new ImageIcon ("....") 
  jRadioButton.setIcon(Icon m_ButtonIcon).
  </code></pre>
  
  <p>I get no changing, clickable image. 
  Can you please give me a helping hand? </p>