此代码我已经发布了一次Delete check-boxes in swings，我得到了答案。但很快我的项目要求发生了变化，所以我决定改变我的代码。而不是索引删除尝试直接从列表中删除值。
我在这个过程中遇到一个问题，即如果我一次删除一个复选框，但是如果我尝试一次删除一个以上的复选框，则不删除我不是没有我被卡住了。
这是我的代码。
import java.awt.*;
import java.util.List;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.border.TitledBorder;
@SuppressWarnings("serial")
public class DeleteMapSheets extends JDialog {
private JList list;
private JPanel rightPanel;
TitledBorder title;
// Adding for progress bar
JDialog dailog = new JDialog();
JPanel jContentPa;
JProgressBar jProgressBar;
// Add radio buttons
private final static JRadioButton vector = new JRadioButton("Vector", true);
private final static JRadioButton raster = new JRadioButton("Raster");
private final static JRadioButton elevator = new JRadioButton("Elevator");
private static ButtonGroup buttonGroup = new ButtonGroup();
private static Object dialog;
JButton cancel = new JButton("Cancel");
JButton delbtn = new JButton("Delete");
List<Integer> indexVal = new ArrayList<Integer>();
public DeleteMapSheets() {
}
public DeleteMapSheets(List<String> vectorMap, List<String> elevatorMap,
List<String> rastorMap) {
createList(createData(vectorMap));
createElevator(createData(elevatorMap));
createRastor(createData(rastorMap));
createButtons();
initUI();
}
private void createList(final List<CheckListItem> mappedList) {
vector.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent event) {
checklistModel mModel = (checklistModel) list.getModel();
if (event.getStateChange() == 1) {
mModel.setItems(mappedList);
list.validate();
list.repaint();
}
}
});
checklistModel gChecklist = new checklistModel(mappedList);
list = new JList(gChecklist);
// list.setModel(mModel);
list.setCellRenderer(new CheckListRenderer());
list.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
list.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent event) {
if (event.getClickCount() == 1) {
CheckListItem checkValue = (CheckListItem) list
.getSelectedValue();
if (checkValue != null) {
checkValue.setSelected(!checkValue.isSelected());
list.validate();
list.repaint(list.getBounds());
}
}
}
});
}
// Default
private List<CheckListItem> createData(List<String> list2) {
int n = list2.size();
List<CheckListItem> items = new ArrayList<DeleteMapSheets.CheckListItem>();
for (int i = 0; i < n; i++) {
items.add(new CheckListItem(list2.get(i)));
}
return items;
}
// Elevator
private List<String> createElevator(final List<CheckListItem> list2) {
elevator.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent event) {
if (event.getStateChange() == 1) {
checklistModel mModel = (checklistModel) list.getModel();
mModel.setItems(list2);
list.validate();
list.repaint();
}
}
});
return null;
}
// Create Vector
private List<String> createRastor(final List<CheckListItem> list2) {
raster.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent event) {
if (event.getStateChange() == 1) {
checklistModel mModel = (checklistModel) list.getModel();
mModel.setItems(list2);
list.validate();
list.repaint();
}
}
});
return null;
}
private void createButtons() {
rightPanel = new JPanel();
cancel.setMaximumSize(cancel.getMaximumSize());
delbtn.setMaximumSize(cancel.getMaximumSize());
// Cancel button taking the action
cancel.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
System.exit(0);
}
});
// Cancel
delbtn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
/*I am facing the problem here after i checked i am getting only one value */
final int dialogButton = JOptionPane.YES_NO_OPTION;
final int dialogResult = JOptionPane.showConfirmDialog(null,
"Are you sure you want to delete the selected map",
"Delete", dialogButton);
SwingWorker<?, ?> worker = new SwingWorker<Void, Integer>() {
protected Void doInBackground() throws InterruptedException {
checklistModel mModel = (checklistModel) list
.getModel();
if (dialogResult == JOptionPane.YES_OPTION) {
for (CheckListItem items : mModel.items) {
if (items.isSelected) {
mModel.removeAt(items);
}
}
}
return null;
}
protected void done() {
//RefreshProgressDailog.dispose();
}
};
if (dialogResult == 0) {
worker.execute();
//RefreshProgressDailog.setVisible(true);
}
}
});
rightPanel.setLayout(new BoxLayout(rightPanel, BoxLayout.LINE_AXIS));
rightPanel.setBorder(BorderFactory.createEmptyBorder(0, 4, 4, 4));
rightPanel.add(Box.createHorizontalStrut(60));
rightPanel.add(delbtn);
rightPanel.add(Box.createRigidArea(new Dimension(10, 0)));
rightPanel.add(cancel);
}
private void initUI() {
// JScroll Panel
JScrollPane listScroller = new JScrollPane(list);
listScroller.setPreferredSize(new Dimension(250, 80));
// listScroller.setAlignmentX(LEFT_ALIGNMENT);
// Lay out the label and scroll pane from top to bottom.
JPanel listPane = new JPanel();
listPane.setLayout(new BoxLayout(listPane, BoxLayout.Y_AXIS));
// Add all to the panel
listPane.add(Box.createRigidArea(new Dimension(0, 2)));
// listPane.add(listScroller);
listPane.setBorder(BorderFactory.createEmptyBorder(5, 10, 10, 10));
// Lay out the buttons from left to right.
JPanel buttonPane = new JPanel();
buttonPane.setLayout(new BoxLayout(buttonPane, BoxLayout.LINE_AXIS));
buttonPane.setBorder(BorderFactory.createEmptyBorder(0, 10, 10, 10));
buttonPane.add(Box.createHorizontalStrut(60));
buttonPane.add(delbtn);
buttonPane.add(Box.createRigidArea(new Dimension(10, 0)));
buttonPane.add(cancel);
JPanel radioPanel = new JPanel();
radioPanel.setLayout(new BoxLayout(radioPanel, BoxLayout.LINE_AXIS));
title = BorderFactory.createTitledBorder("Types Of Data");
// Add the radio buttons
buttonGroup.add(vector);
buttonGroup.add(raster);
buttonGroup.add(elevator);
radioPanel.setAlignmentX(Component.CENTER_ALIGNMENT);
radioPanel.add(vector);
radioPanel.add(raster);
radioPanel.add(elevator);
radioPanel.setBorder(title);
listPane.add(buttonPane);
listPane.add(radioPanel);
listPane.add(listScroller);
// listPane.add(setButton);
// Put everything together, using the content pane's BorderLayout.
Container contentPane = getContentPane();
contentPane.add(listPane, BorderLayout.CENTER);
contentPane.add(buttonPane, BorderLayout.PAGE_END);
add(listPane);
add(listPane);
setTitle("Delete Map");
setSize(300, 350);
setLocationRelativeTo(null);
}
class CheckListItem {
private String label;
private boolean isSelected = false;
public CheckListItem(String string) {
this.label = string;
}
public boolean isSelected() {
return isSelected;
}
public void setSelected(boolean isSelected) {
this.isSelected = isSelected;
}
public String toString() {
return label;
}
}
class CheckListRenderer extends JCheckBox implements ListCellRenderer {
public Component getListCellRendererComponent(JList list, Object value,
int index, boolean isSelected, boolean hasFocus) {
setEnabled(list.isEnabled());
setSelected(((CheckListItem) value).isSelected());
// System.out.println("i am checked "+((CheckListItem)
// value).isSelected());
setFont(list.getFont());
setBackground(list.getBackground());
setForeground(list.getForeground());
setText(value.toString());
return this;
}
}
class checklistModel extends AbstractListModel {
private List<CheckListItem> items;
public checklistModel(List<CheckListItem> list) {
super();
this.items = list;
}
public void setItems(List<CheckListItem> createData) {
this.items = createData;
fireContentsChanged(this, items.size() - 1, items.size());
}
public void setChecklistItems(List<CheckListItem> item2) {
this.items = new ArrayList<DeleteMapSheets.CheckListItem>();
for (CheckListItem item : item2) {
this.items.add(item);
}
}
public void add(CheckListItem item) {
items.add(item);
}
public CheckListItem getElement(CheckListItem items) {
return items;
}
@Override
public CheckListItem getElementAt(int index) {
if (index != -1 || index > 0) {
return items.get(index);
}
return null;
}
@Override
protected void fireIntervalRemoved(Object Source, int index0, int index1) {
super.fireIntervalRemoved(Source, index0, index1);
}
@Override
public int getSize() {
return items.size();
}
public void removeAt(CheckListItem item) {
items.remove(item);
fireIntervalRemoved(this, items.size(), items.size());
}
}
public static void main(String[] args) throws ClassNotFoundException,
InstantiationException, IllegalAccessException,
UnsupportedLookAndFeelException {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
List<String> vectorMap = new ArrayList<String>();
vectorMap.add("20");
vectorMap.add("21");
vectorMap.add("22");
vectorMap.add("23");
vectorMap.add("24");
vectorMap.add("25");
vectorMap.add("26");
vectorMap.add("27");
vectorMap.add("28");
List<String> elevatorMap = new ArrayList<String>();
elevatorMap.add("0elevator");
elevatorMap.add("1elevator");
elevatorMap.add("2elevator");
elevatorMap.add("3elevator");
elevatorMap.add("4elevator");
elevatorMap.add("5elevator");
elevatorMap.add("6elevator");
elevatorMap.add("7elevator");
List<String> rastorMap = new ArrayList<String>();
rastorMap.add("0r");
rastorMap.add("1r");
rastorMap.add("2r");
rastorMap.add("3r");
rastorMap.add("4r");
rastorMap.add("5r");
rastorMap.add("6r");
rastorMap.add("7r");
DeleteMapSheets ex = new DeleteMapSheets(vectorMap,
elevatorMap, rastorMap);
ex.setVisible(true);
}
});
}
}
答案 0 :(得分：1)
尝试使用此代码。阅读内联评论。
if (dialogResult == JOptionPane.YES_OPTION) {
// First collect all the selected CheckListItem
List<CheckListItem> removed = new ArrayList<CheckListItem>();
for (CheckListItem item : mModel.items) {
if (item.isSelected) {
removed.add(item);
}
}
// Finally remove the selected CheckListItem
for (CheckListItem item : removed) {
mModel.removeAt(item);
}
}
以下是您的代码，您在删除项目的同时迭代导致问题的项目。
if (dialogResult == JOptionPane.YES_OPTION) {
for (CheckListItem items : mModel.items) { // Iterating Items
if (items.isSelected) {
mModel.removeAt(items); // REMOVE Item
}
}
}