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Create an instance of DecimalFormat with the required format and use its format() method to format the double value. See the DecimalFormat javadoc for details on specifying format.

double d = 1.23456789;

// Use 2 decimal places

NumberFormat numberFormat =
   new DecimalFormat("#.##");

String s = numberFormat.format(d);
System.out.println(s);   // Outputs: 1.23 

written by objects \\ tags: double, format, string