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

A very easy solution is to use a action listener.

TextFieldActionPerformed(java.awt.event.ActionEvent evt) {
    String textFieldValue = TextField.getText();
    try {
        Integer.parseInteger(textFieldValue);
    } catch(Exception e){
        JOptionPane.showMessageDialog(null, "Please insert Valid Number Only");
        TextField.setText(textFieldValue.substring(0,textFieldValue.length()-1));
    }
}

You Can use it for Double as well:

Double.parseDouble(TextField.getText());