Make JTextField select all its contents when it appears

Question

I have a JLabel that when you click on it is replaced with a JTextField , I need the JTextField automatically select all the text when it appears.

Thanks for the help.

Answer 1

Solution: do this through the focus event. Not the best solution.

 public static void main(final String[] args) { // simple window preparation final JFrame f = new JFrame(); f.setBounds(200, 200, 400, 400); f.setVisible(true); { // this sleep part shall simulate a user doing some stuff try { Thread.sleep(2345); } catch (final InterruptedException ignore) {} } { // here the interesting part for you, this is what you put inside your button listener or whatever final JTextField t = new JTextField("Hello World!"); t.addFocusListener(new FocusListener() { @Override public void focusLost(final FocusEvent pE) {} @Override public void focusGained(final FocusEvent pE) { t.selectAll(); } }); f.add(t); f.validate(); t.requestFocus(); } } 

Answer 2

JTextField.selectAll () is what you need.

 import java.awt.*; import java.awt.event.*; import javax.swing.*; public class SelectAll { private int count = 0; private void displayGUI() { JFrame frame = new JFrame("Select All"); frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); final JPanel contentPane = new JPanel(); JButton addButton = new JButton("Add"); addButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent ae) { JTextField tfield = new JTextField(10); tfield.setText("" + (++count)); contentPane.add(tfield); tfield.requestFocusInWindow(); tfield.selectAll(); contentPane.revalidate(); contentPane.repaint(); } }); contentPane.add(addButton); frame.setContentPane(contentPane); frame.pack(); frame.setLocationByPlatform(true); frame.setVisible(true); } public static void main(String... args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { new SelectAll().displayGUI(); } }); } } 

Answer 3

The JTextField class contains methods in its API for this.

This can help:

http://forums.codeguru.com/showthread.php?308517-How-do-you-highlight-the-text-in-a-JTextfield