double to String problem

[Max Fedorov]

I designed a reporting engine that calculats totals at the end, so I needed
to convert double to String, in order to append it to a StringBuffer variable.

String text = new String().valueOf(double);

or

StringBuffer strBuf = new StringBuffer();
strBuf.append(double);
cell.addObject(new HTMLText(strBuf.toString()));

But after the convertion the value 6.20, for instance, becomes
6.199999999999998

Do you have any suggestions?
Thanx.

[Jim Deutch]

There's lots of different ways to do it, but I've rounded Doubles to 4
significant figures with

private final double r4 = 10000d;
Double startx = new Double((double)Math.round(startPoint.x*r4)/r4);

Jim Deutch

Max Fedorov wrote in message <38db9904$1@news.devx.com>...
>
>I designed a reporting engine that calculats totals at the end, so I needed
>to convert double to String, in order to append it to a StringBuffer
variable.
>
>String text = new String().valueOf(double);
>
>or
>
>StringBuffer strBuf = new StringBuffer();
>strBuf.append(double);
>cell.addObject(new HTMLText(strBuf.toString()));
>
>But after the convertion the value 6.20, for instance, becomes
>6.199999999999998
>
>Do you have any suggestions?
>Thanx.