Decimalformat: unwanted replace of dot with comma in JTable

Question

I have a problem displaying the numbers in JTable. If I try to format the number 3.456007 with DecimalFormat using:

DecimalFormat formatter = new DecimalFormat("#.###"); 

The output in JTable is 3,456 instead of 3.456 . If I don't format the number than the result is correct with dot: 3.456007 How can I show only 3 decimal places without losing the dot ?

Answer 1

The important thing to note here is that the "." character in your format does not mean dot. It means: decimal separator corresponding to the Locale .

You can have an actual "." by explicitly setting a Locale where the decimal separator is indeed a dot. Example:

    NumberFormat df = NumberFormat.getInstance(Locale.ENGLISH);
    System.out.println(df.format(12.3456)); //prints 12.346