control decimal places

[System_Error]

Is there a way that I can control the number of decimal places a number has?

For instance if a calculation = 5.42343423456453454

can I make this 5.42?

[Dillinger4]

Look into the java.text.DecimalFormat class. There is a method that allows you to set the maximum amount of decimal places. Im pretty sure you can also apply a pattern using the DecimalFormat class.

[Dillinger4]

Here's some code to give you an idea.

 NumberFormat nf = NumberFormat.getNumberInstance();
 DecimalFormat df = (DecimalFormat)nf;
 df.applyPattern("###.##"); 
 double calculation = 5.42343423456453454;
 System.out.println(calculation);
 System.out.println(df.format(calculation));

[System_Error]

Thank you very much.