Jlist not appearing in jpanel

Question

I'm just messing around trying to get a JList to show work, but it won't show up. I've been going off the JList tutorial at http://java.sun.com/docs/books/tutorial/uiswing/components/list.html
but I don't know what I'm doing wrong.
     private class FileListPanel extends JPanel{
          public FileListPanel(){
               String[] arr = {";laskdfj","asdf"};
               JList fileList = new JList(arr);
               add(fileList);
               fileList.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
               fileList.setLayoutOrientation(JList.HORIZONTAL_WRAP);
               fileList.setVisible(true);
               fileList.setVisibleRowCount(-1);
               fileList.setSelectedIndex(1);
               JScrollPane listScroller = new JScrollPane(fileList);
               listScroller.setPreferredSize(new Dimension(100,100));
               listScroller.setAlignmentX(LEFT_ALIGNMENT);
     }and I'm calling that from the constructor for the class using
Container gcp = getContentPane();
gcp.setLayout(new BorderLayout());
gcp.add(new FileListPanel(), BorderLayout.CENTER);
...

Answer 1

In situations like this, you're shooting yourself in the foot if you don't post a SSCCE. Demo:
import java.awt.*;
import javax.swing.*;
public class JListExample {
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable(){
            public void run() {
                launch();
    static void launch() {
        String[] data = {"aaa","bbb","ccc","ddd","eee",
            "fff","ggg","hhh","iii","jjj"};
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(new JScrollPane(new JList(data)));
        f.setSize(100,100);
        f.setLocationRelativeTo(null);
        f.setVisible(true);
}And in the future, please post Swing questions to the Swing forum.