List selection event : List « Swing JFC « Java

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Java » Swing JFC » List Screenshots  List selection event import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Vector; import javax.swing.JComboBox; import javax.swing.JLabel; import javax.swing.JList; import javax.swing.ListModel; import javax.swing.event.ListSelectionEvent; import javax.swing.event.ListSelectionListener; public class SelectionHandler implements ActionListener, ListSelectionListener {   private JLabel direction;   private JList source, destination;   public SelectionHandler(JLabel d, JList left, JList right) {     direction = d;     source = left;     destination = right;   }   public void actionPerformed(ActionEvent a) {     JComboBox cb = (JComboBox) a.getSource();     String selected = (String) cb.getSelectedItem();     String current = direction.getText();     if (!selected.equals(current)) {       direction.setText(selected);       JList temp = source;       source = destination;       destination = temp;       source.clearSelection();       destination.clearSelection();     }   }   public void valueChanged(ListSelectionEvent e) {     JList list = (JList) e.getSource();     String item = (String) source.getSelectedValue();     System.out.println(item);     if (item != null && !item.equals("")) {       removeFromSource(item);       addToDestination(item);     }   }   private void removeFromSource(String item) {     ListModel model = source.getModel();     Vector listData = new Vector();     for (int i = 0; i < model.getSize(); i++) {       listData.addElement(model.getElementAt(i));     }     listData.removeElement(item);     source.setListData(listData);   }   private void addToDestination(String item) {     ListModel model = destination.getModel();     Vector listData = new Vector();     for (int i = 0; i < model.getSize(); i++) {       listData.addElement(model.getElementAt(i));     }     listData.addElement(item);     destination.setListData(listData);   } }   Related examples in the same category 1.  Use JList component to display custom objects with ListCellRenderer 2.  An example of JList with a DefaultListModel 3.  Create JList from array of string value 4.  A graphical list selection monitor 5.  Test of the DragGesture classes and JList to see if we can recognize a simple drag gesture 6.  Dual JList with buttons in between 7.  extends ListCellRenderer to display icons 8.  Add JList to Scroll pane 9.  Dual Sample: JList and ComboBox 10.  JList selection changed listener 11.  Triple List from same data array 12.  List with and without ScrollPane 13.  Set visible row count and fixed cell height and width 14.  List: Shared Data Sample 15.  List Data Event Demo 16.  How to use the list component 17.  Create list from list model 18.  How to create list cell renderer 19.  React to list selection action 20.  Construct the list component 21.  Tab list renderer 22.  List with textfield input 23.  Sharing a Model between a JList and JComboBox 24.  Demonstrate Swing ScrollingList 25.  Demonstrate Swing JList ListModel 26.  Weak ListModel 27.  ListModel Demo 28.  ModifyModelSample: ListModel Demo 29.  ArrayList with a ListModel for ease of use 30.  Drag and Drop:JList and List 31.  JList is a component that displays a list of objects: It allows the user to select one or more items. 32.  A JTextArea is a multi-line text area that displays plain text. 33.  JTextPane component is an advanced component for working with text. 34.  Model for a JButton: manage only the state of the button 35.  A default button model 36.  JList: ListModel and ListSelectionModel. The ListModel handles data. ListSelectionModel works with the GUI. 37.  A single-selection JList. 38.  Listening for Changes to the Items in a JList Component 39.  Listening for Changes to the Selection in a JList Component 40.  Detecting Double and Triple Clicks on an Item in a JList Component 41.  Arranging Items in a JList Component 42.  changes the layout orientation so that its items are displayed top-to-bottom and left-to-right. 43.  Make the number of visible rows dependent on the height of the list, the visibleRowCount property must be set to 0: 44.  Setting the Selection Mode of a JList Component 45.  The selected items must be in a contiguous range 46.  Multiple ranges of selected items are allowed 47.  Setting the Selected Items in a JList Component 48.  import javax.swing.JList; 49.  Select all the items 50.  Clear all selections 51.  Select the first item 52.  Add another selection - the third item 53.  Deselect the first item 54.  Select a single item 55.  Getting the Selected Items in a JList Component 56.  Get the index of the last selected item 57.  Determine if the third item is selected 58.  Determine if there are any selected items 59.  Return the selected item objects: 60.  Adding and Removing an Item in a JList Component 61.  Append an item 62.  Insert an item at the beginning 63.  Create a list that allows adds and removes 64.  Set method replaces an item 65.  Methods are used to remove items 66.  Getting the Items in a JList Component 67.  Methods are used to find an item: 68.  These methods can be used to find the range of visible items: 69.  Get index of first visible item 70.  Get index of last visible item 71.  Setting a Tool Tip for an Item in a JList Component 72.  Setting the Dimensions of an Item in a JList Component 73.  It is also possible to set the item dimensions using a sample value: 74.  Creating a JList Component 75.  The items can be arbitrary objects. The toString() method of the objects is displayed in the list component. 76.  Determining the Selected JRadioButton in a Button Group 77.  A spinner that rolls from the end of a list to beginning