Creating sideBar in a class

Question

Hi, I'm currently laying out my screen in swing and am having a few problems.
I have created a class for a sidebar as follows:
public class sideBar extends JPanel{
     public sideBar(){
          setLayout(new BoxLayout(sideBar, BoxLayout.Y_AXIS));
          String[] labels = {"First Name", "Initial", "Surname"};
          int[] size = {10, 1, 20};
          textForm nodeDetails = new textForm(labels, size);
          viewZoom = new JPanel();
          viewZoom.setSize(400,200);
          viewZoom.setBorder(BorderFactory.createLineBorder(Color.black));
          test = new JButton ("THIS");
          add(viewZoom);
          add(nodeDetails);
          add(test);
          setBorder(BorderFactory.createLineBorder(Color.black));
I then create the sidebar and add it to the main layout as follows:
sideBar side = new sideBar();
     // create content pane
contentPane.add(side, BorderLayout.EAST);
This compiles fine but I get a run time error stating:
exception in thread "main" java.awt.AWTError BoxLayout can't be shared
Any ideas why this is?????

Answer 1

You try to add the BoxLayout to the class in general and to the concrete Object sideBar in particular. That is a conflict.
Try to exchange sideBar by this
  setLayout( new BoxLayout( this, BoxLayout.Y_AXIS ) );Hope this helps, Rommie.