Decimal and special formatting in Java

Question

I would like to convert my final double value i.e ( 1.0 ) to be printed out like $1.00. How is this possible in Java?

I imported java.lang.* DecimalFormat formatter = new DecimalFormat("#.00");

Not sure how to get the dollar sign in there. I didn't know if there was any other way to do this aside from going "$" + .....

Answer 1

Use String.format:

// Format double with 2 decimal places and add a dollar sign
String price = "$" + String.format("%.2f", myDouble);

To print it directly, use PrintWriter.printf, e.g. on System.out:

System.out.printf("$%.2f", myDouble);

Answer 2

Use DecimalFormat

    double value = 1.0;
    DecimalFormat dformat = new DecimalFormat("#.00");
    String modifiedVal = dformat.format(value);
    System.out.println("$"+modifiedVal);

Answer 3

The NumberFormat class has a pre-defined instance for currency formatting.

double value = 1.0;
NumberFormat nf = NumberFormat.getCurrencyInstance();
System.out.println(nf.format(value));

Answer 4

You can make use of Locale & NumberFormat classes in Java.

NumberFormat formatter = NumberFormat.getCurrencyInstance(new Locale("en","US"));
System.out.println(formatter.format(1.0));