Java Swing中JList选择事件监听器ListSelectionListener用法示例

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IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package awtDemo;/* * ListSelectionDemo.java requires no other files. */import javax.swing.*;import javax.swing.event.*;import java.awt.*;import java.awt.event.*;@SuppressWarnings("serial")public class ListSelectionDemo extends JPanel {  JTextArea output;  @SuppressWarnings("rawtypes") JList list;   JTable table;  String newline = "/n";  ListSelectionModel listSelectionModel;  @SuppressWarnings({ "unchecked", "rawtypes" }) public ListSelectionDemo() {    super(new BorderLayout());    String[] listData = { "one", "two", "three", "four",               "five", "six", "seven" };    @SuppressWarnings("unused") String[] columnNames = { "French", "Spanish", "Italian" };    list = new JList(listData);    listSelectionModel = list.getSelectionModel();    listSelectionModel.addListSelectionListener(        new SharedListSelectionHandler());    JScrollPane listPane = new JScrollPane(list);    JPanel controlPane = new JPanel();    String[] modes = { "SINGLE_SELECTION",              "SINGLE_INTERVAL_SELECTION",              "MULTIPLE_INTERVAL_SELECTION" };    final JComboBox comboBox = new JComboBox(modes);    comboBox.setSelectedIndex(2);    comboBox.addActionListener(new ActionListener() {      public void actionPerformed(ActionEvent e) {        String newMode = (String)comboBox.getSelectedItem();        if (newMode.equals("SINGLE_SELECTION")) {          listSelectionModel.setSelectionMode(            ListSelectionModel.SINGLE_SELECTION);        } else if (newMode.equals("SINGLE_INTERVAL_SELECTION")) {          listSelectionModel.setSelectionMode(            ListSelectionModel.SINGLE_INTERVAL_SELECTION);        } else {          listSelectionModel.setSelectionMode(            ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);        }        output.append("----------"               + "Mode: " + newMode               + "----------" + newline);      }    });    controlPane.add(new JLabel("Selection mode:"));    controlPane.add(comboBox);    //Build output area.    output = new JTextArea(1, 10);    output.setEditable(false);    JScrollPane outputPane = new JScrollPane(output,             ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,             ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);    //Do the layout.    JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);    add(splitPane, BorderLayout.CENTER);    JPanel topHalf = new JPanel();    topHalf.setLayout(new BoxLayout(topHalf, BoxLayout.LINE_AXIS));    JPanel listContainer = new JPanel(new GridLayout(1,1));    listContainer.setBorder(BorderFactory.createTitledBorder(                        "List"));    listContainer.add(listPane);  topHalf.setBorder(BorderFactory.createEmptyBorder(5,5,0,5));    topHalf.add(listContainer);    //topHalf.add(tableContainer);    topHalf.setMinimumSize(new Dimension(100, 50));    topHalf.setPreferredSize(new Dimension(100, 110));    splitPane.add(topHalf);    JPanel bottomHalf = new JPanel(new BorderLayout());    bottomHalf.add(controlPane, BorderLayout.PAGE_START);    bottomHalf.add(outputPane, BorderLayout.CENTER);    //XXX: next line needed if bottomHalf is a scroll pane:    //bottomHalf.setMinimumSize(new Dimension(400, 50));    bottomHalf.setPreferredSize(new Dimension(450, 135));    splitPane.add(bottomHalf);  }  /**   * Create the GUI and show it. For thread safety,   * this method should be invoked from the   * event-dispatching thread.   */  private static void createAndShowGUI() {    //Create and set up the window.    JFrame frame = new JFrame("ListSelectionDemo - www.VeVB.COm");    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    //Create and set up the content pane.    ListSelectionDemo demo = new ListSelectionDemo();    demo.setOpaque(true);    frame.setContentPane(demo);    //Display the window.    frame.pack();    frame.setVisible(true);  }  public static void main(String[] args) {    //Schedule a job for the event-dispatching thread:    //creating and showing this application's GUI.    javax.swing.SwingUtilities.invokeLater(new Runnable() {      public void run() {        createAndShowGUI();      }    });  }  class SharedListSelectionHandler implements ListSelectionListener {    public void valueChanged(ListSelectionEvent e) {       ListSelectionModel lsm = (ListSelectionModel)e.getSource();      //System.out.printf("LeadSelectionIndex is %s%n",lsm.getLeadSelectionIndex());      output.append("LeadSelectionIndex is " + lsm.getLeadSelectionIndex() + "/n");      int firstIndex = e.getFirstIndex();      int lastIndex = e.getLastIndex();      boolean isAdjusting = e.getValueIsAdjusting();       output.append("Event for indexes "             + firstIndex + " - " + lastIndex             + "; isAdjusting is " + isAdjusting             + "; selected indexes:");      if (lsm.isSelectionEmpty()) {        output.append(" <none>");      } else {        // Find out which indexes are selected.        int minIndex = lsm.getMinSelectionIndex();        int maxIndex = lsm.getMaxSelectionIndex();        for (int i = minIndex; i <= maxIndex; i++) {          if (lsm.isSelectedIndex(i)) {            output.append(" " + i);          }        }      }      output.append(newline);      output.setCaretPosition(output.getDocument().getLength());    }  }}