jlist

问题 I have been doing research on here and have been searching for a solution to the problem. I am new to java so I don't know all of the syntax. I am trying to get my code to transfer items from create methods for the save and load menu items. The save event handler should call a method save() and save the list of parts in the right panel to an XML file. The load event handler should call a method load() and it should display the unmarshalled data in the right panel. I am not familiar with JAXB

问题 How can i get the selected value from Jlist? I tried the following code, but all variables are displayed null. Why index variable is null? public class GetSelectedValueFromJList extends JFrame implements ActionListener { private JList list; private JButton checkButton; public GetSelectedValueFromJList() { String[] nameList = { "Value 1", "Value 2", "Value 3", "Value 4", "Value 5"}; list = new JList(data); checkButton = new Button("Check"); button.addActionListener(this); //add list to frame

问题 How to load a JList in horizontal fashion?? Here is my code,I am trying to display the JList similar to the screen shot provided. /* * To change this template, choose Tools | Templates * and open the template in the editor. */ import java.awt.BorderLayout; import java.io.File; import java.util.ArrayList; import javax.swing.DefaultListModel; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JPanel; public class Test extends JFrame{ private JList toolsList; private

问题 In my current swing project I have a JList displaying all active sockets, and each cell has a JButton to close that socket. But the JButton in the cell is not clickable: listener does not get fired. I have modified the code to minimal as follows. private class ConnectionListRenderer extends JButton implements ListCellRenderer { public Component getListCellRendererComponent(JList jlist, Object o, int i, boolean bln, boolean bln1) { addActionListener(new ActionListener() { public void

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 was googling for a solution to retrieve data back from a JList component, but didn't find any.So, is there a method of Jlist that return its items? I don't want just a selected one. I want the whole list. The reason is I have this method that updates all the components of a dialogbox base on the selected value of a list box. I want to update that list box from the same method. So to do that, the method should not update the list box whenever it gets called. It should compare the values in

问题 I was wondering if there is a way to retrieve a list of all the elements that have been added to a JList. For example I would like JList to return an array or list of Strings or JLabels from a custom cell renderer. 回答1: Yes of course. You getElementAt() with a loop. Example: import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.DefaultListModel; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JList;

问题 I was wondering if there is a way to retrieve a list of all the elements that have been added to a JList. For example I would like JList to return an array or list of Strings or JLabels from a custom cell renderer. 回答1: Yes of course. You getElementAt() with a loop. Example: import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.DefaultListModel; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JList;

问题 I have a java applet in which I have to display a large amount of items (dictionary entries). The user needs to be able to select individual items in the list, hence it is implemented as a JList. Generating the list was very quick until I decided to make the display more asthetically pleasing by formatting the individual items using HTML. Now the list looks pretty but it takes between 10 and 15 seconds to generate it each time the user accesses the dictionary (without formatting it occurs

问题 everytime i click on a JList item, i need to clear + refresh my current panel & load another panel, returned via method 'populateWithButtons()'. temp is an int variable that stores what was clicked at the JList. How do i rectify the following? list_1.addMouseListener(new MouseAdapter() { @Override public void mouseClicked(MouseEvent evt) { //refresh + populate JPanel Food food = new Food(); JPanel panel2 = new JPanel(); JPanel pane11 = new JPanel(); panel2.add(panel1); panel1.validate();