jlabel | 易学教程

How to set Icon to a JLabel from an image from a folder?

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问题 I am trying to set an icon to a JLabel from a folder of images whenever an item is selected from a JComboBox. The name of items in the JComboBox and name of the images in the folder are same. So whenever an item is selected from the JComboBox, the corresponding image with the same name should be set as an icon to the JLabel. I am trying to do something like this. private void cmb_movieselectPopupMenuWillBecomeInvisible(javax.swing.event.PopupMenuEvent evt){ updateLabel(cmb_moviename

JLabel images array

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问题 I am trying to load the same jlabel stored image twice into a gridlayout panel, however instead of creating two instances of the image, the image is only displayed once then moved. How can I store the same JLabel position in the pieces array into more than one JLabel in the boardLabels array. Thanks :) public static JPanel boardPanel = new JPanel(new GridLayout(4, 0)); public static JLabel pieces[] = new JLabel[2]; private static JLabel[] boardLabels = new JLabel[4]; public MainFrame() {

Newline in JLabel

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问题 How can I display a newline in JLabel ? For example, if I wanted: Hello World! blahblahblah This is what I have right now: JLabel l = new JLabel(\"Hello World!\\nblahblahblah\", SwingConstants.CENTER); This is what is displayed: Hello World!blahblahblah Forgive me if this is a dumb question, I\'m just learning some Swing basics... 回答1: Surround the string with <html></html> and break the lines with <br/> . JLabel l = new JLabel("<html>Hello World!<br/>blahblahblah</html>", SwingConstants

Stretch a JLabel text

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问题 Is there a way to make a JLabel\'s text stretch to 100% height? I need the text to update when the component\'s size changes as well. I saw some solution that could work; It involved calculating and setting the font size so it appears the right height. I would have also have to add listeners for when the height changed to make it respond and I do not know exactly where I should do that. I am hoping for a better solution with layout managers, but couldn\'t find anything. Any ideas? 回答1: In the

How returns XxxSize from JComponent(s) added to the JLabel

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问题 how can I correctly returns XxxSize from JComponent(s) added to the JLabel 1st. figure >> lets LayoutManager works like as for JPanel, JLabel returns Size(0, 0) 2nd. figure >> added some PreferredSize to the JLabel 3rd. figure >> calculated PreferredSize from JComponent(s) added to the JLabel 4th. figure >> lets LayoutManager works changed JLabel to JPanel, now LayoutManager correctly calculated Dimension without using any XxxSize notice sice there is used Nimbus L&F, same output is there for

JLabel - Show longer text as multiple lines?

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问题 So say I have a really long line that I want to display in a JLabel . How can I do it? Currently, longer lines come up as this: I have to resize the window to see the complete text. How can I make it so that there\'s linebreaks when the text almost reaches the width of my JFrame ? I\'m not sure if any code is required here for you to answer this, but still: my frame properties: frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(new Dimension(450, 400));

Multiline text in JLabel

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问题 How can I make the text of a JLabel extend onto another line? 回答1: You can do it by putting HTML in the code, so: JFrame frame = new JFrame(); frame.setLayout(new GridLayout()); JLabel label = new JLabel("<html>First line<br>Second line</html>"); frame.add(label); frame.pack(); frame.setVisible(true); 回答2: if you want your jLabel Text to resize automaticly for example in a stretchable gridbaglayout its enough just to put its text in html tags like so: JLabel label = new JLabel("<html>First

How to add hyperlink in JLabel?

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问题 Which is the best way to add a hyperlink in jLabel? I can get the view using html tags, but how to open the browser when the user clicks on it? 回答1: You can do this using a JLabel , but an alternative would be to style a JButton. That way, you don't have to worry about accessibility and can just fire events using an ActionListener. public static void main(String[] args) throws URISyntaxException { final URI uri = new URI("http://java.sun.com"); class OpenUrlAction implements ActionListener {

Update JLabel repeatedly with results of long running task

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问题 I\'m writing a program that constantly pings a server. I wrote the code to check it once and put the ping in a JLabel and put it in a method called setPing() . Here is my code private void formWindowOpened(java.awt.event.WindowEvent evt) { setPing(); } That worked but only did it once, so I did: private void formWindowOpened(java.awt.event.WindowEvent evt) { for(;;){ setPing(); } } But this doesn\'t even work for the first time. I didnt put the setPing method because it was too long so here

How to add hyperlink in JLabel?

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Which is the best way to add a hyperlink in jLabel? I can get the view using html tags, but how to open the browser when the user clicks on it? You can do this using a JLabel , but an alternative would be to style a JButton . That way, you don't have to worry about accessibility and can just fire events using an ActionListener . public static void main(String[] args) throws URISyntaxException { final URI uri = new URI("http://java.sun.com"); class OpenUrlAction implements ActionListener { @Override public void actionPerformed(ActionEvent e) { open(uri); } } JFrame frame = new JFrame("Links");