Setting number of decimal points using double

Is it possible to set the number of decimal points
e.g.
double a = 2 * Math.random() - 1;
If I print this it would show something like 0.2342345434332.
What I want to do is show 0.234.
Is this possible?

here you go, you can run this small program to test the results for yourself...
import java.text.DecimalFormat;
public class floatTest{
     public static void main( String args[]){
DecimalFormat threeDig = new DecimalFormat("0.000");
      double a = 2 * Math.random() - 1;
      //If I print this it would show something like 0.2342345434332.
      System.out.println("double a >" + a);
System.out.println("formatted>0.000 >" + threeDig.format(a)     );
     }//end of float
}//end of floatTEstok?

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I was interested to have the following getNumberOfDecimalPlace function :
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Please [don't cross-post!|http://stackoverflow.com/questions/2296110/determine-number-of-decimal-place-using-bigdecimal], it's considered rude. If you must do it, then at least link each post so that people can find out which answers you've already got in order to avoid duplicate work on our part.
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Attachments:
basic_serial_read.vi ‏100 KB

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Setting number of decimal points using double

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