// Support an integer number; if a decimal point is typed,
// the decimal point and all following characters are discarded
JFormattedTextField tft1 = new JFormattedTextField(NumberFormat.getIntegerInstance());
tft1.setValue(new Integer(123));

// Retrieve the value from the text field
Integer intValue = (Integer)tft1.getValue();


// Support a decimal number with one digit following the decimal point;
// if more digits after the decimal point is typed, the value is rounded to one decimal place
JFormattedTextField tft2 = new JFormattedTextField(new DecimalFormat("#.0"));
tft2.setValue(new Float(123.4F));

// Retrieve the value from the text field
Float floatValue = (Float)tft2.getValue();