You probably have a variable(FileReader,…) open, remember that you need to close them close() if its a gui application call JFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 7 solved Java application closed but still the dist process running [closed]
You should replace your scoreadd method by this: public void scoreadd(){ Scorelbl.setText(String.valueOf(++scoreadd)); } The attribute scoreadd is already there. The ++scoreadd operation increases its value by 1. Then, the label is updated. 1 solved How to make a variable that can be used for storing integer data in Java GUI
Look ma, no windows here, just us teddies… public class TestTrayIcon01 { public static void main(String[] args) { new TestTrayIcon01(); } public TestTrayIcon01() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { TrayIcon icon = new TrayIcon(ImageIO.read(getClass().getResource(“/SmallTeddy.png”))); SystemTray tray = SystemTray.getSystemTray(); tray.add(icon); } catch (Exception ex) { ex.printStackTrace(); } JDialog dialog = new … Read more
its not disabling the tabs Why do you think making a panel invisible will disable a tab? If you want to disable a tab then take a look at the JTabbedPane API. Look at all the “setter” methods. You will find a method that allows you to disable individual tabs. solved I have these 5 … Read more
Add an actionlistener to your JButton and it will tell you when its been clicked like so: someButton.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { //the button was pressed and do your stuff here. } } 3 solved Mouse event handling in Swing
A quick test reveals that nothing happens: import javax.swing.JComboBox; class ComboBoxTest { public static void main(String[] args) { JComboBox<String> box = new JComboBox<String>(); box.removeAllItems(); } } No errors were thrown 0 solved Could the combobox.removeAllItems method throw an exception if the combobox was empty? [closed]
You need to remove the break statements in your ‘do-while’ loop. solved How to fix this simple program in JAVA? guessing game
I have just removed the following lines of code from the jComboBox.addActionListener(new ActionListener(){ … }); What I am doing is, adding model to table two times that why it is not getting the selected row. After removing following lines of code it works fine. table = new JTable(model); table3 = new JTable(model1); table.setRowHeight(30); table3.setRowHeight(30); JScrollPane … Read more
It is setting default text. I’ve done it as bellow. public class BisectionIterations extends JFrame implements ActionListener { private JTextArea textArea = new JTextArea(“This text should display”); private JScrollPane scrollPane = new JScrollPane(textArea); private JButton closeBtn = new JButton(“Close”); //Array Double[] iterationBi = new Double[1000]; public BisectionIterations(Double[] iter) { this.iterationBi = iter; setLayout(new BorderLayout()); setSize(500, … Read more
The problem you are experiencing is with this piece of code: int percent = (totalDataRead * 100) / filesize; Download.status.setText(totalDataRead / 1024 + “kb/” + filesize / 1024 + “kb”); setProgress(percent); Your value for percent must be outside the range 0…100 as the exception message is coming from the setProgress method: http://docs.oracle.com/javase/7/docs/api/javax/swing/SwingWorker.html#setProgress(int) Note: IllegalArgumentException – … Read more
All of the buttons are there, they are simply stacked on top of each other in the same location, you should look into using layout managers to achieve the desired result. Check out the Oracle guide here 1 solved How do i create multiple buttons and partition them such that all those buttons appear on … Read more
You can of course write a method that creates JButton for you: public JButton createButton(String label, ActionListener listener, int x, int y) { JButton b = new JButton(label); name.addActionListener(listener); name.setBounds(x, y, 150, 50); return b; } and then use the method like this: button19 = createButton(“Toiletsager”, this, 100, 100); You can of course also specify … Read more
You have declared class level variables, but you are not using them, you are creating local variables in main() with the same name, these variables are not the same as class level variables. Instead of doing stuffs like this JTextPane ta = new JTextPane(); you should do this.ta = new JTextPane(); This code should fix … Read more
First, the label for radios is not shown, because you don’t create it and add it to panel. Create it and add it to panel before radioB1. Also, you should add some invisible (empy) label before radioB2 (or use some other filler component to fill the cell – perhaps this could help: http://docs.oracle.com/javase/tutorial/uiswing/layout/box.html#filler). Also, you … Read more
Problem is in the actionPerformed() method. The class variable patient is null. You can do a null check like this… public void actionPerformed(ActionEvent e) { if(e.getSource() == reportButton && patient != null) { System.out.println(“I’m Clicked!”); patient.setAge(ageField, log); } } Or you can initalize the variable… public void actionPerformed(ActionEvent e) { if (patient == null) { … Read more