DecimalFormat not rounding with HALF_EVEN mode

[Raj Ohadi]

		String format = "###0;-###0";
                               	DecimalFormat dFormat = new DecimalFormat(format);
                                String s = dFormat .format(500.55);
                                System.out.println("s = " +s);
	
		

The ouput is 500. It means it just simply truncates the digits after decimal. How do I use the Decimal pattern like
"###0;-###0" to indicate it has no decimal but maintain an half-even rounding mode ? I read the DecimalFormat API and it says its default rounding mode is half-even. But it seems this rounding is not applied here.

Please help.

[Winston Gutkowski]

Raj Ohadi wrote:I read the DecimalFormat API and it says its default rounding mode is half-even.

I'm an old printf() fan (String.format() works the same way BTW), and with that you'd use:

System.out.printf("%.0f%n", 500.55);

but I can't help much with DecimalFormat because I'm no expert. I suspect it has far more options; with printf()/String.format() you have to accept its default rounding (whatever that is; probably half-even too).

Winston

[Campbell Ritchie]

Winston Gutkowski wrote: . . its default rounding (whatever that is; probably half-even too).

Winston

I think it’s half away from zero, but I’m not certain.

[Campbell Ritchie]

I have checked in the Formatter class; for %e it says[quot]ethe value will be rounded using the round half up algorithm.