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  • NSTextField (Label) Attributed Text: Select

    - by huntaub
    I have a NSTextField Label that has attributed text in it. The color and size are different from the defaults. (The text is a bit larger and green) Now, I need to be able to select the text in the label so as the click the hyperlinks embedded in the attributed text. This works fine; however, when selecting the text the format of the text reverts back to the defaults (a smaller, black font). Is there anyway to stop this behavior so that my styling is preserved when the user clicks (selects text) on a Label?

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  • About GridLayout.

    - by Knowing me knowing you
    Hi, if I have code like so: class X extends JFrame { X() { setLayout(new GridLayout(3,3)); JButton b = new JButton("A-ha"); /*I would like to add this button in the center of this grid (2,2)*/ //How can I do it? } }; Thanks.

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  • What if a large number of objects are passed to my SwingWorker.process() method?

    - by Trejkaz
    I just found an interesting situation. Suppose you have some SwingWorker (I've made this one vaguely reminiscent of my own): public class AddressTreeBuildingWorker extends SwingWorker<Void, NodePair> { private DefaultTreeModel model; public AddressTreeBuildingWorker(DefaultTreeModel model) { } @Override protected Void doInBackground() { // Omitted; performs variable processing to build a tree of address nodes. } @Override protected void process(List<NodePair> chunks) { for (NodePair pair : chunks) { // Actually the real thing inserts in order. model.insertNodeInto(parent, child, parent.getChildCount()); } } private static class NodePair { private final DefaultMutableTreeNode parent; private final DefaultMutableTreeNode child; private NodePair(DefaultMutableTreeNode parent, DefaultMutableTreeNode child) { this.parent = parent; this.child = child; } } } If the work done in the background is significant then things work well - process() is called with relatively small lists of objects and everything is happy. Problem is, if the work done in the background is suddenly insignificant for whatever reason, process() receives a huge list of objects (I have seen 1,000,000, for instance) and by the time you process each object, you have spent 20 seconds on the Event Dispatch Thread, exactly what SwingWorker was designed to avoid. In case it isn't clear, both of these occur on the same SwingWorker class for me - it depends on the input data, and the type of processing the caller wanted. Is there a proper way to handle this? Obviously I can intentionally delay or yield the background processing thread so that a smaller number might arrive each time, but this doesn't feel like the right solution to me.

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  • My Jtable is blank

    - by mazin
    Hello my q is about a jtable that i have ,i fill it with components from a .txt ,I have a main (menu ) JFrame and by pressing a jbutton i want the jtable to pop out ! My problem is that my jtable is blank and it supposed to show some date !I would appreciated any help , Thanks. this is my ''reading'' class` public static void main(String[] args) { company Company=new company(); payFrame jframe=new payFrame(Company); jframe.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE); jframe.setSize(600,300); jframe.setVisible(true); readClass(); } //diavasma public static void readClass(){ ArrayList<Employee> emp =new ArrayList<Employee>() ; //Employee[] emp=new Employee[7]; //read from file try { int i=0; // int rowCounter; // int payments=0; String inputDocument = ("src/Employees.txt"); FileInputStream is = new FileInputStream(inputDocument); Reader iD = new InputStreamReader(is); BufferedReader buf = new BufferedReader(iD); String inputLine; while ((inputLine = buf.readLine()) != null) { String[] lineParts = inputLine.split(","); String email = (lineParts[7]); int EmpNo = Integer.parseInt(lineParts[0]); String type = lineParts[10]; int PostalCode = Integer.parseInt(lineParts[5]); int phone = Integer.parseInt(lineParts[6]); int DeptNo = (short) Integer.parseInt(lineParts[8]); double Salary; int card = (short) Integer.parseInt(lineParts[10]); int emptype = 0; int hours=Integer.parseInt(lineParts[11]); if (type.equals("FULL TIME")) { emptype = 1; } else if (type.equals("SELLER")) { emptype = 2; } else { emptype = 3; } /** * Creates employee instances depending on their type of employment * (fulltime=1, salesman=2, parttime=3) */ switch (emptype) { case 1: Salary = Double.parseDouble(lineParts[10]); emp.add(new FullTime(lineParts[1], lineParts[2], EmpNo, lineParts[3], lineParts[4], PostalCode, phone, email, DeptNo, card, Salary,hours, type)); i++; break; and this is my class where i make my Jtable and fill him public class company extends JFrame { private ArrayList<Employee> emp = new ArrayList<Employee>(); public void addEmployee(Employee emplo) { emp.add(emplo); } public ArrayList<Employee> getArray() { return emp; } public void getOption1() { ArrayList<Employee> employee = getArray(); JTable table = new JTable(); DefaultTableModel model = new DefaultTableModel(); table.setModel(model); model.setColumnIdentifiers(new String[]{"Code", "First Name", "Last Name", "Address", "City", "Postal Code", "Phone", "Email", "Dept Code", "Salary", "Time Card", "Hours"}); for (Employee current : employee) { model.addRow(new Object[]{current.getempCode(), current.getfirst(), current.getlast(), current.getaddress(), current.getcity(), current.getpostalCode(), current.gettelephone(), current.getemail(), current.getdep(), current.getsalary(), current.getcardcode(), current.getHours() }); } table.setPreferredScrollableViewportSize(new Dimension(500, 50)); table.setFillsViewportHeight(true); JScrollPane scrollPane = new JScrollPane(table); add(scrollPane); setVisible(true); table.revalidate();

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  • redirect inputStream to JTextField

    - by gt_ebuddy
    I want to redirect the Standard System input to JTextField, So that a user must type his/her input in JTextField (instead of console.) I found System.setIn(InputStream istream) for redirecting System.in. Here is my scratch code where i confused on reading from JTextField - inputJTextField. System.setIn(new InputStream() { @Override public int read() throws IOException { //how to read content? return Integer.parseInt(inputJTextField.getText()); } }); My Question is how to read content from GUI Component ( like JTextField and Cast it to String and other types after redirecting the input stream?

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  • JComobox is not showing in the JDialog

    - by Pujan Srivastava
    I have 2 classes. when I put bold 3 lines in the method addCourses() the dialog does not show combobox in the Panel but when I remove from addCourses and put those bold lines in the constructor, JComboBox are shown in the Panel. But data will not show because data items updates to ComboBox will happen after Constructor is created. How can I solve this problem. this.mainPanel.add(courseCombo, BorderLayout.NORTH); this.mainPanel.add(sessionCombo, BorderLayout.CENTER); this.mainPanel.add(courseButton, BorderLayout.SOUTH); public class Updator { CourseListFrame clf = new CourseListFrame(); for(...){ clf.addContentsToBox(displayName, className); } clf.addCourses(); } and second class is public class CourseListFrame extends JDialog implements ActionListener { public JPanel mainPanel = new JPanel(new BorderLayout(2, 2)); public JButton courseButton = new JButton(("Submit")); public JComboBox courseCombo; public JComboBox sessionCombo; public Multimap<String, String> map; // = HashMultimap.create(); public static CourseListFrame courseListDialog; public CourseListFrame() { super(this.getMainFrame()); this.getContentPane().add(mainPanel); map = HashMultimap.create(); courseCombo = new JComboBox(); courseCombo.addItem("Select Courses"); courseCombo.addActionListener(this); sessionCombo = new JComboBox(); } public void addContentsToBox(String course, String session) { map.put(course, session); courseCombo.addItem(course); } public void actionPerformed(ActionEvent e) { JComboBox cb = (JComboBox) e.getSource(); String str = (String) cb.getSelectedItem(); setSessionCombo(str); } public void setSessionCombo(String course) { if (map.containsKey(course)) { sessionCombo.removeAllItems(); Iterator it = map.get(course).iterator(); while (it.hasNext()) { sessionCombo.addItem(it.next()); } } } public void addCourses() { this.mainPanel.add(courseCombo, BorderLayout.NORTH); this.mainPanel.add(sessionCombo, BorderLayout.CENTER); this.mainPanel.add(courseButton, BorderLayout.SOUTH); } public static void showCourseListDialog() { if (courseListDialog == null) { courseListDialog = new CourseListFrame(); } courseListDialog.pack(); courseListDialog.setVisible(true); courseListDialog.setSize(260, 180); } }

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  • How to center elements in the BoxLayout using center of the element?

    - by Roman
    I use outputPanel.setLayout(new BoxLayout(outputPanel, BoxLayout.Y_AXIS)); and then I add elements (for example JLabels, JButtons) to the outputPanel. For example: outputPanel.add(submitButton);. I see that all added elements are "centered". It is good, because I do want my elements to be in the center. When I write "center" I mean "equal distance from left and right". But the problem is that the left part of the element is put into the center. And I want to have center of elements to be put into the center. How can I get this behavior?

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  • How to display panel which is of Singleton class in two different frames at a time?

    - by Sriku
    I am trying to display a singleton obj on two different Jframe, but it is displayed only in the Jframe in which the object is added at last ( in example Frame2). Other Jframe is empty. This Singleton class is inherited from Panel and contains a label in it. Can anybody please tell me how can i display this singleton object in two different frame ? public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { NewJFrame inst = new NewJFrame(); inst.setTitle("Frame1"); inst.setSize(300, 300); inst.setLocationRelativeTo(null); inst.setVisible(true); singltonpanel _sin = singltonpanel.instance(); inst.add(_sin); inst.repaint(); JFrame frame = new JFrame("Frame2"); frame.setSize(300, 300); frame.setVisible(true); singltonpanel _sin1 = singltonpanel.instance(); frame.add(_sin1); frame.repaint(); } });

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  • How to set specific column settings in JTable?

    - by HansDampf
    How can I make my JTable show specific stuff for each column? Can I use an Object for more than one column? I want to have a column showing the date (dd.mm.yyyy) and another to show the time (hh:mm) but as I have it now it only shows the String representation of the Date object as a whole. public class AppointmentTableModel extends AbstractTableModel { ... @Override public Object getValueAt(int rowIndex, int columnIndex) { return appointments.get(rowIndex).getByColumn(columnIndex); } } public class Appointment { ... public Object getByColumn(int columnIndex) { switch (columnIndex) { case 0: return date; case 1: return date; case 2: return sample; case 3: return sample; case 4: return history; case 5: return comment; } return null; } }

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  • a problem with JTabedPanel

    - by sirvan
    hi, I have an application that includes an JtabedPanel and two Tabes with some componetnts,my problem is when i click on another Tab,it's components not appeared immediately but when mouse courser move over each component(Jcheckbox,Jbutton and so on) of the tab,the components will appear but not correctly (see below image) This is my CODE . . .

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  • JMenu issue with Gnome's native look and feel.

    - by gmunk
    I stumbled on a very odd problem while trying to set up a JMenuBar with the native look and feel of Gnome. Here is a screenshot: http://img23.imageshack.us/i/issuel.png/ It has to say File there but it gets cut out. http://pastebin.com/CjFhmxcf http://pastebin.com/gwB3vnC3 Any, help is appreciated!

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  • how to display a image in java application after downloading the image

    - by Nubkadiya
    i want to display a image after downloading that image from a web-server i have wrote the code for downloading the image. but i cant set it up to a label or any thing other than jframe (because i want to add more buttons and labels to the GUI). here is the code to download the image from the webserver. now i want to set it to a label. please help me URL url = new URL("http://www.personal.psu.edu/acr117/blogs/audrey/images/image-2.jpg"); image = ImageIO.read(url);

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  • Resultset (getter/setter class) object not deleting old values at 2nd Time execution in swin

    - by user2384525
    I have summarizeData() method and called so many time for value retrieve. but first time is working file but 2nd time execution value is increasing in HashMap. void summarizeData() { HashMap outerMap = new HashMap(); ArrayList list = new ArrayList(dataClass.getData()); for (int indx = 0; indx < list.size(); indx++) { System.out.println("indx : " + indx); Resultset rs = new Resultset(); rs = (Resultset) list.get(indx); if (rs != null) { int id = rs.getTestCaseNumber(); if (id > 0) { Object isExists = outerMap.get(id); if (isExists != null) { //System.out.println("found entry so updating"); Resultset inRs = new Resultset(); inRs = (Resultset) isExists; if (inRs != null) { int totExec = inRs.getTestExecution(); int totPass = inRs.getTestCasePass(); int totFail = inRs.getTestCaseFail(); // System.out.println("totE :" + totExec + " totP:" + totPass + " totF:" + totFail); int newRsStat = rs.getTestCasePass(); if (newRsStat == 1) { totPass++; inRs.setTestCasePass(totPass); } else { totFail++; inRs.setTestCaseFail(totFail); } totExec++; // System.out.println("id : "+id+" totPass: "+totPass+" totFail:"+totFail); // System.out.println("key : " + id + " val : " + inRs.getTestCaseNumber() + " " + inRs.getTestCasePass() + " " + inRs.getTestCaseFail()); inRs.setTestExecution(totExec); outerMap.put(id, inRs); } } else { // System.out.println("not exist so new entry" + " totE:" + rs.getTestExecution() + " totP:" + rs.getTestCasePass() + " totF:" + rs.getTestCaseFail()); outerMap.put(id, rs); } } } else { System.out.println("rs null"); } } Output at 1st Execution: indx : 0 indx : 1 indx : 2 indx : 3 indx : 4 indx : 5 indx : 6 indx : 7 indx : 8 indx : 9 indx : 10 totE :1 totP:1 totF:0 indx : 11 totE :1 totP:1 totF:0 indx : 12 totE :1 totP:1 totF:0 indx : 13 totE :1 totP:1 totF:0 indx : 14 totE :1 totP:1 totF:0 indx : 15 totE :1 totP:1 totF:0 indx : 16 totE :1 totP:1 totF:0 indx : 17 totE :1 totP:1 totF:0 indx : 18 totE :1 totP:1 totF:0 indx : 19 totE :1 totP:1 totF:0 Output at 2nd Execution: indx : 0 indx : 1 indx : 2 indx : 3 indx : 4 indx : 5 indx : 6 indx : 7 indx : 8 indx : 9 indx : 10 totE :2 totP:2 totF:0 indx : 11 totE :2 totP:2 totF:0 indx : 12 totE :2 totP:2 totF:0 indx : 13 totE :2 totP:2 totF:0 indx : 14 totE :2 totP:2 totF:0 indx : 15 totE :2 totP:2 totF:0 indx : 16 totE :2 totP:2 totF:0 indx : 17 totE :2 totP:2 totF:0 indx : 18 totE :2 totP:2 totF:0 indx : 19 totE :2 totP:2 totF:0 while i required same output on every execution.

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  • How to read and save data from text file with variable number of columns in a Matrix in Matlab

    - by khan
    I have a text file with integer values. each row contains information about specific object. But unfortunately each row has different number of column. because of which when i try to use file_content = load('txtfile.txt'); it gives me error message that previous number of columns does not match. i also tried to use fgetl, fscanf, etc function but was unsuccessful. Can anybody give me a piece of code, or help me how to read a txt file and save in matrix in matlab. Three sample rows are given below. 1 1 1 1 1 95 17 54 111 92 17 54 111 92 17 54 111 92 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 54 109 92 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 58 109 96 15 58 109 96 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 58 109 96 15 56 109 94 15 56 109 94 15 58 109 96 15 58 109 96 15 56 109 94 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 17 58 111 96 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 15 56 109 94 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 1 1 1 2 96 185 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 15 56 109 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 54 107 92 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 13 56 107 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 54 109 92 15 54 109 92 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 1 1 1 3 186 245 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 56 109 94 15 58 109 96 15 58 109 96 15 58 109 96 15 58 109 96 13 58 107 96 13 56 107 94 13 56 107 94 13 58 107 96 13 58 107 96 13 58 107 96 13 58 107 96 13 58 107 96 13 56 107 94 13 58 107 96 13 58 107 96 13 58 107 96 13 58 107 96 13 58 107 96 13 58 107 96 13 58 107 96 13 58 107 96 13 58 107 96 13 58 107 96 13 58 107 96 13 60 107 98 13 58 107 96 13 58 107 96 15 58 109 96 13 58 107 96 As you can see the rows doesn't have equal number of columns. So how can i read and save it in a Matrix. Any help in this regards will be highly appreciated. Thanks

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  • How can I change the arrow style in a JComboBox

    - by Stephane Grenier
    Let's say I want to use a custom image for the arrow in JComboBox, how can I do this? I understand it's possible using the synth xml files, or maybe even UIManager.put(...), but I don't know how. All I want to do at this time is change the arrow image to something else, either programatically or even just overriding the image it uses. How exactly can I do this?

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  • jframe adding own design jinternal frame error

    - by Van Minh
    I designed a title bar color on my JInternal frame. Then I took attempt to add it to my JFrame, but I cannot. Here is the code of my title bar: public class MyIFtitleBar extends BasicInternalFrameTitlePane { public MyIFtitleBar(JInternalFrame jif) { super(jif); } protected void paintTitleBackground(Graphics g){ g.setColor(Color.pink); g.fillRect(0, 0, getWidth(), getHeight()); } } Here is my JInternal frame. I tried running it in its psvm method, that worked! public class FitnessProg_Frame extends javax.swing.JInternalFrame { public FitnessProg_Frame() { initComponents(); this.setUI(new BasicInternalFrameUI(this){ @Override protected JComponent createNorthPane(JInternalFrame jif) { return new MyIFtitleBar(jif); } }); } @SuppressWarnings("unchecked") private void initComponents() { setBackground(new java.awt.Color(255, 255, 255)); setBorder(new javax.swing.border.MatteBorder(null)); setTitle("Fitness Progarm"); setPreferredSize(new java.awt.Dimension(507, 304)); pack(); } } But when I add it to my JFrame I get an error: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException Here is my JFrame code: public class NewJFrame extends javax.swing.JFrame { public NewJFrame() { initComponents(); FitnessProg_Frame ff = new FitnessProg_Frame(); ff.setVisible(true); mydes.add(ff); // this line made errors } @SuppressWarnings("unchecked") private void initComponents() { mydes = new javax.swing.JDesktopPane(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); javax.swing.GroupLayout mydesLayout = new javax.swing.GroupLayout(mydes); mydes.setLayout(mydesLayout); mydesLayout.setHorizontalGroup( mydesLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGap(0, 400, Short.MAX_VALUE) ); mydesLayout.setVerticalGroup( mydesLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGap(0, 300, Short.MAX_VALUE) ); getContentPane().add(mydes, java.awt.BorderLayout.CENTER); pack(); } public static void main(String args[]) { try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new NewJFrame().setVisible(true); } }); } private javax.swing.JDesktopPane mydes; }

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  • Java BoxLayout alignment issue

    - by ManInMoon
    Can anyone help me. Why is the Label "Current" NOT left aligned in Panel/Frame? public static void main(String[] args) { JFrame TFrame = new JFrame("Test DisplayLayout"); TFrame.setResizable(true); TFrame.setSize(new Dimension(900, 840)); TFrame.setLocationRelativeTo(null); TFrame.setTitle("DisplayLayout"); TFrame.setVisible(true); JPanel P = DisplayLayout2(); P.setVisible(true); P.setOpaque(true); P.setLayout(new BoxLayout(P, BoxLayout.Y_AXIS)); TFrame.add(P); TFrame.revalidate(); TFrame.repaint(); } public static JPanel DisplayLayout2() { JPanel Panel=new JPanel(); Panel.setVisible(true); Panel.setOpaque(true); Panel.setLayout(new BoxLayout(Panel, BoxLayout.Y_AXIS)); Panel.setAlignmentX(Component.LEFT_ALIGNMENT); JLabel lab = new JLabel("Current"); lab.setHorizontalAlignment(SwingConstants.LEFT); lab.setForeground(Color.WHITE); lab.setBackground(Color.PINK); lab.setOpaque(true); Panel.add(lab,Component.LEFT_ALIGNMENT); JPanel posPanel = new JPanel(); JScrollPane scrollPane = new JScrollPane(posPanel,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_NEVER); scrollPane.setPreferredSize(new Dimension(290, 200)); scrollPane.setOpaque(true); posPanel.setBackground(Color.YELLOW); posPanel.setPreferredSize(new Dimension(290, 200)); posPanel.setLayout(new BoxLayout(posPanel, BoxLayout.Y_AXIS)); posPanel.setAlignmentX(Component.LEFT_ALIGNMENT); Panel.add(scrollPane); return Panel; }

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  • How to display a tree of objects in a JTree?

    - by paul
    Imagine a collection of objects such as World, Country, Region and City. World contains a list of Country objects, Country contains a list of Region objects etc. I would like to represent this structure in a JTree and be able to add, remove and move objects around the tree. Can I easily create a TableModel from this structure? World would be the root object and I would need to perform some object-specific rendering. Any one know of an appropriate tutorial?

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  • jprogressbar visible and working on button click

    - by Jisson
    public NewJDialog(java.awt.Frame parent, boolean modal) { super(parent, modal); initComponents(); jProgressBar1.setVisible(false); } private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { jButton1.setEnabled(false); jProgressBar1.setVisible(true); repaint(); for(int i=0;i<=100;i+=5){ jProgressBar1.setValue(i); // jProgressBar1.setIndeterminate(false); try{ jProgressBar1.paintImmediately(0, 0, 100, 100);//0, 1, 100, 10 Thread.sleep(100); jProgressBar1.setStringPainted(true); }catch(Exception e){} } I use above code for using a Jprogressbar in a JDialog,If I use this I can see a progressbar aftercompleting its process(100 %) and also I want to hide progressbar upto buttonclick.Can any one help me?

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  • JButtons re-enable themselves after being disabled

    - by Anarchist
    I have an array of JButtons which form a keypad interface. After six numbers are entered I want to disable the keypad so that no further numbers can be entered by the user. I have written the code and the buttons do disable until the mouse hovers above any of them, then the buttons seem to re-enable themselves and run actionEvents added to them. The full code is available here. Possible things that I think are wrong. There is some sort of MouseListener which is ignoring when I set button.setEnabled(false); I haven't separated attributes from the buildGUI(); correctly, I only did this anyway so that the inner class could access them. Possibly something to do with the gridLayout as disabling the buttons seems to work for my services JPanel buttons.

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  • MouseListener fired without checking JCheckBox

    - by Morinar
    This one is pretty crazy: I've got an AppSight recording (for those not familiar, it's a recording of what they did including keyboard/mouse input + network traffic, etc) of a customer reproducing a bug. Basically, we've got a series of items listed on the screen with JCheckBox-es down the left side. We've got a MouseListener set for the JPanel that looks something like this: private MouseAdapter createMouseListener() { return new MouseAdapter(){ public void mousePressed( MouseEvent e ) { if( e.getComponent() instanceof JCheckBox ) { // Do stuff } } }; } Based on the recording, it appears very strongly that they click just above one of the checkboxes. After that, it's my belief that this listener fired and the "Do stuff" block happened. However, it did NOT check the box. The user then saw that the box was unchecked, so they clicked on it. This caused the "Do stuff" block to fire again, thus undoing what it had done the first time. This time, the box was checked. Therefore, the user thinks that the box is checked, and it looks like it is, but our client thinks that the box is unchecked as it was clicked twice. Is this possible at all? For the life of me, I can't reproduce it or see how it could be possible, but based on the recording and the data the client sent to the server, I can't see any other logical explanation. Any help, thoughts, and or ideas would be much appreciated.

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