Ich habe hier ein Beispiel zu DragAndDrop gefunden. Folgende Zeile verstehe ich nicht:
JList list = SampleComponents.list();
Kann mir jemand sagen was dieses SampleComponents ist und was es macht?
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
/**
* This program demonstrates the basic Swing support for drag and drop.
* @version 1.10 2007-09-20
* @author Cay Horstmann
*/
public class SwingDnDTest
{
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
JFrame frame = new SwingDnDFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
}
class SwingDnDFrame extends JFrame
{
public SwingDnDFrame()
{
setTitle("SwingDnDTest");
JTabbedPane tabbedPane = new JTabbedPane();
JList list = SampleComponents.list();
tabbedPane.addTab("List", list);
JTable table = SampleComponents.table();
tabbedPane.addTab("Table", table);
JTree tree = SampleComponents.tree();
tabbedPane.addTab("Tree", tree);
JFileChooser fileChooser = new JFileChooser();
tabbedPane.addTab("File Chooser", fileChooser);
JColorChooser colorChooser = new JColorChooser();
tabbedPane.addTab("Color Chooser", colorChooser);
final JTextArea textArea = new JTextArea(4, 40);
JScrollPane scrollPane = new JScrollPane(textArea);
scrollPane.setBorder(new TitledBorder(new EtchedBorder(), "Drag text here"));
JTextField textField = new JTextField("Drag color here");
textField.setTransferHandler(new TransferHandler("background"));
tabbedPane.addChangeListener(new ChangeListener()
{
public void stateChanged(ChangeEvent e)
{
textArea.setText("");
}
});
tree.setDragEnabled(true);
table.setDragEnabled(true);
list.setDragEnabled(true);
fileChooser.setDragEnabled(true);
colorChooser.setDragEnabled(true);
textField.setDragEnabled(true);
add(tabbedPane, BorderLayout.NORTH);
add(scrollPane, BorderLayout.CENTER);
add(textField, BorderLayout.SOUTH);
pack();
}
}