jcheckbox

问题 Im making an application that lets me perform hashes, at the top I want to have a group of check boxes basically saying the four different hash types I have. When the check boxes are selected I want the labels to appear showing the hashed entered text. I've attached an image to hopefully make it easier to understand what I mean. The reason I'm doing this is so that when the final program is made with almost 10 rows of text boxes and labels it can be reduced only to show the ones that the user

问题 I need to create a Java Swing JList with three Components. Each JList row should have one JCheckBox, one ImageIcon and one JLabel. The problem is that JLabel could have only two elements. So i need a methode to add a JCheckBox... Jlist with three components:- 回答1: Without any real information, the best I can suggest is start by having a look at Concepts: Editors and Renderers and Writing a Custom Cell Renderer for how cell renders work. Based on you basic requirements, you need to start with

问题 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

问题 In my program, I want to uncheck all the checkboxes whenever this method is called. Can someone explain why it isn't working? Whenever I call this method the checkboxes are still selected. private void nextQuestionButtonActionPerformed(java.awt.event.ActionEvent evt) { clearOptions(); } public void clearOptions () { //Make sure the check boxes are not checked optionA.setSelected(false); optionB.setSelected(false); optionC.setSelected(false); optionD.setSelected(false); } 回答1: first of all you

问题 In my program, I want to uncheck all the checkboxes whenever this method is called. Can someone explain why it isn't working? Whenever I call this method the checkboxes are still selected. private void nextQuestionButtonActionPerformed(java.awt.event.ActionEvent evt) { clearOptions(); } public void clearOptions () { //Make sure the check boxes are not checked optionA.setSelected(false); optionB.setSelected(false); optionC.setSelected(false); optionD.setSelected(false); } 回答1: first of all you

问题 Please have a look at the following code import java.awt.GridLayout; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import javax.swing.Box; import javax.swing.BoxLayout; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JDialog; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; public class TestSend extends JFrame { private Box names, emails; private JButton ok; private Map

问题 I have a Problem with some icons and check-boxes in a JPopupMenu . The Check-boxes and Icons are not aligned The Items are created like: JMenuItem deleteAttributeMenuItem = new JMenuItem(locale.getString("TREE_AttrDelete"), iconDelete); JMenuItem primaryKeyAttributeMenuItem = new JCheckBoxMenuItem(locale.getString("TREE_AttrChkBoxPK")); Please take a look at the picture: Any tips? 回答1: Have a look at this, in order to achieve what you wanted, I did this, JCheckBoxMenuItem cbmi = new

问题 I have a Problem with some icons and check-boxes in a JPopupMenu . The Check-boxes and Icons are not aligned The Items are created like: JMenuItem deleteAttributeMenuItem = new JMenuItem(locale.getString("TREE_AttrDelete"), iconDelete); JMenuItem primaryKeyAttributeMenuItem = new JCheckBoxMenuItem(locale.getString("TREE_AttrChkBoxPK")); Please take a look at the picture: Any tips? 回答1: Have a look at this, in order to achieve what you wanted, I did this, JCheckBoxMenuItem cbmi = new

问题 My program compiles and runs, but here is my problem. I have a checkbox set up for each item, but I only need it to total the items that are checked and not all of the items. Instead its totalling all items regardless of whether or not they are checked. import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JCheckBox; import javax.swing.JPanel; import javax.swing.JTextField;

问题 Here is a simple graphics programs which adds some stars on the screen. import acm.graphics.*; import acm.program.*; import java.awt.event.*; import javax.swing.*; /** * This program creates a five-pointed star every time the * user clicks the mouse on the canvas. */ public class DrawStarMap1 extends GraphicsProgram { public void init() { /* Initializes the mouse listeners */ addMouseListeners(); /* The check box starts out in the "on" position */ fillCheckBox = new JCheckBox("Filled");