how to filter certain characters in JTextField

问题

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

回答1:

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
}});

More on the same here

回答2:

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

来源：https://stackoverflow.com/questions/15703644/how-to-filter-certain-characters-in-jtextfield