jcheckbox | 易学教程

How to create a JTree with JCheckbox to Show Systems All drives and its Folders/Files

阅读更多关于 How to create a JTree with JCheckbox to Show Systems All drives and its Folders/Files

问题 I am beginner in java. I am creating a file chooser that can select multiple drives, folders or files at a time for worm scanning purpose. I have written the code to work fine for a single drive (e.g. c:\ or e:\ etc). I am trying to create a tree for all drives in system. Please tell me how to accomplish this. Code import javax.swing.*; import javax.swing.event.*; import javax.swing.tree.*; import java.io.File; import java.util.Collections; import java.util.Vector; public class FileTreeDemo {

Setting the color for a JCheckBox cell in a JTable

阅读更多关于 Setting the color for a JCheckBox cell in a JTable

问题 I have a JCheckBox working in the last column in a JTable. But when I set the color to the cells in that column, it seem to overwrite the rendered object (JCheckBox). The snippet of code below is what I am trying to do: //Overriding these methods using the DefaultTableModel constructor works . DefaultTableModel model = new DefaultTableModel(data, columnNames) { @Override public Class getColumnClass(int col) { return getValueAt(1, col).getClass(); } @Override public boolean isCellEditable(int

Creating dcheckbox dynamically in Java-NetBeans

阅读更多关于 Creating dcheckbox dynamically in Java-NetBeans

问题 I am developing a simple "To-do List" application which involves obtaining 'things to do' for a particular day from the database and displaying them as checkbox text on a panel resting on a frame.There is a button "done" which can be used to remove the ticked checkboxes after a task is complete. The code that I used for the dynamic creation of the checkboxes is shown below: //cnt-variable used to store the number of tasks for a day //rs1-ResultSet variable into which the task description is

JCheckBoxMenuItem only one selected

阅读更多关于 JCheckBoxMenuItem only one selected

问题 So I want to have a JMenu Level with three JCheckBoxMenuItem like Easy, normal and expert. Of course, only one can be checked and if one is checked, it can't be unchecked (enabled(false)) because it's the only one. I want when one JCheck is checked, all others are unchecked. So it seems easy, but the only solution I found is to do it with a lot of "if" conditions. Is there a way to do it with a better algorithm ? 回答1: It sounds like you'd be better off using a JRadioButton since check boxes

Implementation of switch case for check box

阅读更多关于 Implementation of switch case for check box

问题 Is there any way to implement switch case for checkbox? Example: I have 4 checkboxes, if I selected 2 checkboxes, how to trigger the case to the output I want? double exam = 0.0, assign = 0.0, quiz = 0.0, ct = 0.0; if (examchkbox.isSelected()) { exam = Double.parseDouble(examtextfield.getText()); } if(ctchkbox.isSelected()) { ct = Double.parseDouble(cttextfield.getText()); } if(quizchkbox.isSelected()) { quiz = Double.parseDouble(quiztextfield.getText()); } if(asschkbox.isSelected()) { assign

Delete checkboxes in swings

阅读更多关于 Delete checkboxes in swings

问题 i am doing one project related to swings in this i am facing one problem like some 5 check boxes are there in this if i delete two non immediate check boxes (or) single check box i am able to delete but if i delete two immediate check boxes i am not able to delete i.e i have check boxes like 1,2,3,4,5 if i delete 1 and 3 , 1 and 4 , or 3 and 5 etc... (or) 1,2,3 etc.. if i delete using this combination i am able to delete but if i delete 1 and 2 or 2 and 3 or 4 and 5 like immediate check boxes

how to create jcombobox with jcheck box and multiple selection

阅读更多关于 how to create jcombobox with jcheck box and multiple selection

问题 I want to create JComboBox with checkboxes and multiple selection . i have created a list with check box after rendering the jlist . I dont know how to render it with jcombobox . Or is it possible to make jlist as drop down list like combo box . for jlist rendering i am using the following code DefaultListModel listModel = new DefaultListModel(); ListCheckBox li= new ListCheckBox(listModel); JScrollPane jsp= new JScrollPane(li); add(jsp); listModel.add(0,new JCheckBox("Other Court"));

Dynamically create jCheckBox and add to a jScrollPane

阅读更多关于 Dynamically create jCheckBox and add to a jScrollPane

问题 EDIT: Using the solutions presented below, I have changed the code to have a JPanel inside a JScrollPane. Using a JButton i add JCheckBoxes to the JPanel inside the JScrollPane. This was one problem solved, as the a JScrollPanecan only take one JComponent. The rest of the issues were solved setting a gridlayout to the JPanel inside JScrollPane. I have kept my original question here for the sake of posterity: ORIGINAL QUESTION: I'm trying to dynamically create JCheckBox and add them to a

How do I add a JCheckBox to DefaultTableModel by adding a Boolean column?

阅读更多关于 How do I add a JCheckBox to DefaultTableModel by adding a Boolean column?

I am trying to add a jcheckbox to the first column of a JTable, which uses a DefaultTableModel . I tried returning a Boolean.class for that column, but it doesn't work. I already have a jcombobox in the last column, but using the same method I used to add that in order to add a jcheckbox doesn't work. I read online that java automatically returns a checkbox for you if you render a Boolean.class in a column, but using it also doesn't work. I think this might be a problem in the way I am ordering the components. //import statements. public class CourseSelection extends GUIDesign implements

JTree rendering with JCheckBox nodes

阅读更多关于 JTree rendering with JCheckBox nodes

问题 I am attempting to modify the standard Swing JTree to intermingle nodes with and without checkboxes. This is an example: When I attempt to check/uncheck one of the checkboxes (the 'User 01' node in this example), the tree loses nodes: I my code is an adaptation of this example: http://forums.sun.com/thread.jspa?threadID=5321084&start=13. Instead of embedding a JCheckBox in a DefaultMutableTreeNode like this: new DefaultMutableTreeNode(new CheckBoxNode("Accessibility", true)); I thought it