how to filter certain characters in JTextField

Question

How to prevent user from entering certain charcters in \'JTextField\' and if enters that character is entered ,do not show it in the textfield

Answer 1

You can either use a JFormattedTextField or create a custom DocumentFilter.

Answer 2

JTextField textField = new JTextField(10);
textField.addKeyListener(new KeyAdapter() {
public void keyTyped(KeyEvent e) {
  char c = e.getKeyChar();
  if (//Write your condition here) {
     e.consume();  // ignore event
}});

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