Walter beat me to analysing the issue 🙂 Adding a bit of detail: It’s correct that a JScrollPane supports mouseWheelHandling. According to the rules of mouseEvent dispatching, the top-most (in z-order) component gets the event, and that’s the scrollPane around the textArea. So if wheeling the textarea is not required, a simple solution might be … Read more
This simple program works for me: import java.awt.event.*; import javax.swing.*; public class Test { public static void main(String [] args) throws Exception{ ActionListener taskPerformer = new ActionListener() { public void actionPerformed(ActionEvent evt) { //…Perform a task… System.out.println(“Reading SMTP Info.”); } }; Timer timer = new Timer(100 ,taskPerformer); timer.setRepeats(false); timer.start(); Thread.sleep(5000); } }
No, you can’t add components at a specific cell. What you can do is add empty JPanel objects and hold on to references to them in an array, then add components to them in any order you want. Something like: int i = 3; int j = 4; JPanel[][] panelHolder = new JPanel[i][j]; setLayout(new GridLayout(i,j)); … Read more
It’s not two competing mechanisms – a JPanel is a Container (just look at the class hierarchy at the top of the JPanel javadocs). JFrame.getContentPane() just returns a Container to place the Components that you want to display in the JFrame. Internally, it’s using a JPanel (by default – you can change this by calling … Read more
Yes, it is possible using JOptionPane.showOptionDialog(). Something like this: JPanel panel = new JPanel(); JLabel label = new JLabel(“Enter a password:”); JPasswordField pass = new JPasswordField(10); panel.add(label); panel.add(pass); String[] options = new String[]{“OK”, “Cancel”}; int option = JOptionPane.showOptionDialog(null, panel, “The title”, JOptionPane.NO_OPTION, JOptionPane.PLAIN_MESSAGE, null, options, options[1]); if(option == 0) // pressing OK button { char[] … Read more
Have you tried using doClick()?
Seems to work okay for me… import java.awt.BorderLayout; import java.awt.EventQueue; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.print.PrinterException; import java.util.Vector; import java.util.logging.Level; import java.util.logging.Logger; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; import javax.swing.table.DefaultTableModel; import javax.swing.table.JTableHeader; public class TestPrint { public static void main(String[] args) { new TestPrint(); } public TestPrint() { EventQueue.invokeLater(new … Read more
Based on your update there are two things that happen here. First is a little mistake when you instatiate your SimpleDateFormat: SimpleDateFormat dateFormat = new SimpleDateFormat(“dd-mm-yyyy”); In this pattern “mm” refers to minutes not months. It should be: SimpleDateFormat dateFormat = new SimpleDateFormat(“dd-MM-yyyy”); Second problem is IMHO a bug since day chooser seems to not … Read more
When you use a layout, invoking pack() “Causes this Window to be sized to fit the preferred size and layouts of its subcomponents.” When you don’t, you have to try to calculate the bounds yourself. If (when) you get it wrong, as shown in the somewhat contrived example below, users will blame you—and not without … Read more
This is a complex topic that might make a good Community Wiki. I’ve only scratched the surface, but NetBeans has an evolving capability in this area. It should be on your short list. See these help topics & links: Generating JPA Controller Classes from Entity Classes Binding Data to a Swing Component Java Persistence Tasks: … Read more