JList to JList Selection Exchange

Question

I'm trying to build a GUI for a project where
Selectable Values can be transfered from one list to
another. I cant explaine what I mean to well so an ASCII picture may come in handy:
From: --> To:
JList <-- JList
Note: --> and <-- are Buttons to do the swaping.
I cant seem to Lay this out I've tried GridBag Grid, Box,
Border as type of ways of laying it out Can someone please help.

Answer 1

Ok new Quandry!
How do I transfere JList Data to annother JList and remember avery & gt; is supposed to be > and any <x> are really [x];
Here is my code I've tried but it doesn't work.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.*;
class LtoL extends JFrame implements ActionListener
     public LtoL()
          String listtest[] = {"one","two","three","four","five","Six"};
          JList rightList = new JList();
          JLabel rightLabel = new JLabel("Selected Processes");
          JList leftList = new JList(listtest);
          JLabel leftLabel =  new JLabel("Available Processes");
          JPanel buttonPanel = new JPanel();
          JPanel buttonPanelNorth =  new JPanel();
          JPanel buttonPanelSouth =  new JPanel();
          JPanel rightSide = new JPanel();
          JPanel leftSide = new JPanel();
          JButton toRight = new JButton("Add Process");
          JButton froRight =  new JButton("Remove Process");
          JButton nextPage =  new JButton("Continue");
          toRight.addActionListener(this);
          froRight.addActionListener(this);
          rightSide.setLayout(new BorderLayout());
          leftSide.setLayout(new BorderLayout());
          rightSide.add(rightLabel,BorderLayout.NORTH);
          rightSide.add(rightList,BorderLayout.CENTER);
          leftSide.add(leftLabel,BorderLayout.NORTH);
          leftSide.add(leftList,BorderLayout.CENTER);
          buttonPanelNorth.setLayout(new BorderLayout());
          buttonPanelSouth.setLayout(new BorderLayout());
          buttonPanel.setLayout(new GridLayout(2,0));
          buttonPanelSouth.add(toRight,BorderLayout.NORTH);
          buttonPanelSouth.add(nextPage,BorderLayout.SOUTH);
          buttonPanelNorth.add(froRight,BorderLayout.SOUTH);
          buttonPanel.add(buttonPanelNorth);
          buttonPanel.add(buttonPanelSouth);
          JPanel mainPanel =  new JPanel();
          mainPanel.setBorder(new EmptyBorder(new Insets(5,5,5,5)));
          mainPanel.setLayout(new GridLayout(0,3));
          mainPanel.add(leftSide);
          mainPanel.add(buttonPanel);
          mainPanel.add(rightSide);
          this.getContentPane().add(mainPanel);
          //Placement 
          Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
          setLocation(dim.width/4-this.getWidth()/2, dim.height/4-this.getHeight()/2);
          //Actions
          setDefaultCloseOperation(EXIT_ON_CLOSE);
          //Show it
          setSize(640,480);
          setResizable(true);
          setVisible(true);
     public void actionPerformed(ActionEvent e)
          if( e.getActionCommand().equals("Add Process"))
               //on button Add :
          rightList.setSelectedIndices(leftList.getSelectedIndices());
          else
               //on button remove
          leftList.setSelectedIndices(rightList.getSelectedIndices());
     public static void main(String args[])
          LtoL l = new LtoL();
}I here are the errors i get as well when i try to compile it.
cannot resolve symbol leftList or rightList why?