jlabel

问题 I have an array of JLabels which I want to add to a JTable. I tried using myJTable.add(myJLabelArray); Hoping it would work, but it doesn't (Obviously, otherwise I wouldn't be here). Can somebody please help? 回答1: Using add method is not the way to add components to a JTable . Components should never be added directly to a JTable or its TableModel . JLabels are just Swing components that render text. You can use a TableCellRenderer . Have a look at Editors & Renderers 回答2: You cannot just add

问题 In the project I am currently working on I have several pieces of information that I would like to make visible via Jlabel. There are a few buttons and textfields elsewhere in the GUI that allow for altering said information I would like to update the JLabel but the text never changes, or updates upon startup. I have attempted to use concurrency to update the labels, as suggested in other questions on this site, but I have had no luck with the labels updating. The concurrency does work with

问题 When spending a few minutes tweaking my desktop clock, I discovered a problem that I seem unable to resolve without help... I read some posts with similar problem but solutions did not work for me. The clock (in typical java form with an Action Listener and Calendar) works just fine. The intended tweak: To set the Frame, ContentPane and Label backgrounds to transparent so only the time/text shows . What happens is this: When the label background is transparent (or until it's opaque enough by

问题 I am using both JLabel s and JTextField s, and need to be able to truncate my doubles to two decimal places when they are displayed by the application. How can I perform this truncation, preferably without switching to JFormattedTextField s? 回答1: You can use DecimalFormat class. Here is an explanation 回答2: Prefer the Swing JFormattedTextField instead; see the Java Tutorial. 来源： https://stackoverflow.com/questions/2525492/how-can-i-output-only-a-certain-number-of-digits-after-a-decimal-place

问题 Hello World, Am kinda new to java and i am trying to create a method that changes a JLabel's text to some text stored in an array when an action happens, somthing like this : JLabel one = new JLabel("Hello World"); JButton b1 = new JButton("Next"); JButton b2 = new JButton("Prev"); String[] main = ["LoveLace","Dynamics","Creed","Main"]; b1.addActionListsner(new ActionListener() { actionPerformed(ActionEvent e) { //In here it will load the first indexed string which is "Lovelace" //This is

问题 I would like to display an image in an area in my Jframe but the image takes up much space. I would like to take it fair precise dimensions. How can I do this in Java This is my simple code : I am open to any proposal if I did not use the right method or the right class to instantiate the image. import java.awt.*; import javax.swing.*; public class ExempleDeplace extends JFrame{ private JLabel myLabel; public ExempleDeplace(){ setLayout(new FlowLayout()); setTitle("Fenetre, modele Duchi");

问题 I am trying to make one image display multiple times. Here's part of my code: JFrame window = new JFrame(); window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); window.setBounds(30, 30, 800, 600); JLabel blue = new JLabel(new ImageIcon("blue.jpg")); JLabel green = new JLabel(new ImageIcon("green.jpg")); window.add(blue); window.add(green); window.add(blue); window.setLayout(new GridLayout(3, 3)); window.setVisible(true); Unfortunately what is created is just one image of each kind. What am

问题 I´m currently working on a little programm witch displays pictures from a website in a little Swing GUI. The Problem is, that every time the picture changes a new frame pops up instead of refreshing the JLable. I have no idea how to realize this after trying a few attempts with different methods. It would be nice if you could give me a little hint. import java.awt.BorderLayout; import java.awt.Image; import java.io.*; import java.net.MalformedURLException; import java.net.URL; import javax

问题 I have a timer with a delay of 5 seconds. I am trying to change the label named lblTimer after a second passes to act as a countdown. I am having issues with it as currently it only works at 5 seconds. Do you have any suggestionsuggestions? protected void Addition() { //addition function final int delay = 5000; //milliseconds ActionListener taskPerformer = new ActionListener() { @SuppressWarnings("unused") public void actionPerformed(ActionEvent evt) { //...Perform a task... frame

问题 I have a form that set a input verifier to it. I want when a user type a correct value for a text field and want to go to other text field, a check icon should be display besides of text field. But now in my code, when user type a correct value on first text field an go to other, Two icons displayed together! public class UserDialog extends JDialog { JButton cancelBtn, okBtn; JTextField fNameTf, lNameTf; JRadioButton maleRb, femaleRb; ButtonGroup group; JLabel fNameLbl, fNamePicLbl, lNameLbl,