How to parse Float to String exactly?

Question

As the title said:

I tried:

        Float.toString(float);
        String.valueOf(float);
        Float.toHexString(float);
        float.toString();

But I found if the Float value = 100.00; Covert to String value will be 100.0. How to avoid it? How to be exactly?

Thanks in advance.

Edits-------------

The answers are point to that those which specific the decimal places.

Answer 1

To be exact, you'd better try to format your Float to String using the NumberFormat class hierarchy : http://docs.oracle.com/javase/6/docs/api/java/text/NumberFormat.html

Answer 2

Its "stupid" to keep 2 zeros at the end. All you've to do is add as many zeros as needed at the moment you're printing it, but internally, it's going to be saved as x.0

Example:

printf ("%.2f", 3.14159);

Prints:

3.14

Answer 3

if you are bent upon doing this..

when you get str = "100.0";

 String[] strNew = str.split(".");

 if(strNew[1].length==1)
 {
 str=str+"0";
 }

BTW A VERY BAD WAY ...

Answer 4

float f = 100.00000f;
String expected = String.format("%.6f", f);

The output of this will be :

100.000000

The length of the numbers after the floating point is done by you.

String.format("%.6f", f) == 100.000000

String.format("%.2f", f) == 100.00