Mega Code Archive
JList
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import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
public class List {
public static void main(String[] args) {
final DefaultListModel model = new DefaultListModel();
final JList list = new JList(model);
JFrame f = new JFrame();
f.setTitle("JList models");
model.addElement("A");
model.addElement("B");
model.addElement("C");
model.addElement("D");
model.addElement("E");
JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
JPanel leftPanel = new JPanel();
JPanel rightPanel = new JPanel();
leftPanel.setLayout(new BorderLayout());
rightPanel.setLayout(new BoxLayout(rightPanel, BoxLayout.Y_AXIS));
list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
list.setBorder(BorderFactory.createEmptyBorder(2, 2, 2, 2));
list.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
if (e.getClickCount() == 2) {
int index = list.locationToIndex(e.getPoint());
Object item = model.getElementAt(index);
String text = JOptionPane.showInputDialog("Rename item", item);
String newitem = "";
if (text != null)
newitem = text.trim();
else
return;
if (!newitem.isEmpty()) {
model.remove(index);
model.add(index, newitem);
ListSelectionModel selmodel = list.getSelectionModel();
selmodel.setLeadSelectionIndex(index);
}
}
}
});
leftPanel.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
leftPanel.add(new JScrollPane(list));
JButton removeall = new JButton("Remove All");
JButton add = new JButton("Add");
JButton rename = new JButton("Rename");
JButton delete = new JButton("Delete");
add.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String text = JOptionPane.showInputDialog("Add a new item");
String item = null;
if (text != null)
item = text.trim();
else
return;
if (!item.isEmpty())
model.addElement(item);
}
});
delete.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
ListSelectionModel selmodel = list.getSelectionModel();
int index = selmodel.getMinSelectionIndex();
if (index >= 0)
model.remove(index);
}
});
rename.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
ListSelectionModel selmodel = list.getSelectionModel();
int index = selmodel.getMinSelectionIndex();
if (index == -1)
return;
Object item = model.getElementAt(index);
String text = JOptionPane.showInputDialog("Rename item", item);
String newitem = null;
if (text != null) {
newitem = text.trim();
} else
return;
if (!newitem.isEmpty()) {
model.remove(index);
model.add(index, newitem);
}
}
});
removeall.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
model.clear();
}
});
rightPanel.add(add);
rightPanel.add(rename);
rightPanel.add(delete);
rightPanel.add(removeall);
rightPanel.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 20));
panel.add(leftPanel);
panel.add(rightPanel);
f.add(panel);
f.setSize(350, 250);
f.setLocationRelativeTo(null);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
}
}
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