TextField integer/Number validator in java swing

Example show how to create a text field in java swing that accepts only numbers

initializing variable


private JFormattedTextField expAmount_txt = null;

adding to container


panel.add(getExpAmount_txt(),null);
private JFormattedTextField getExpAmount_txt() {
if (expAmount_txt == null) {
Format general = NumberFormat.getInstance();
expAmount_txt = new JFormattedTextField(general);
expAmount_txt.setBounds(new Rectangle(120, 40, 120, 20));
expAmount_txt.setHorizontalAlignment(JFormattedTextField.RIGHT);
}
return expAmount_txt;
}

retrieving value


Double.parseDouble(expAmount_txt.getValue().toString());






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Thanking you..........