Is there any way to accept only numeric values in a JTextField?

Question

Is there any way to accept only numeric values in a JTextField? Is there any special method for this?

Answer 1

if (JTextField.getText().equals("") || !(Pattern.matches("^[0-9]+$", JTextField.getText()))) {
     JOptionPane.showMessageDialog(null, " JTextField Invalide !!!!! ");
   }

• if JTextField.getText().equals("") ==-> if JTextField is empty
• if(!(Pattern.matches("^[0-9]+$", JTextField.getText()))) ==-> if TextField contains other characters than those
• JOptionPane.showMessageDialog(null, " JTextField Invalide !!!!! ");==-> so this message will aparate