How to format a double with leading zero and decimals in Java

Question

Requirements:

• Leading zero (total 2 length) before the Dot

• 3 decimals

  // Example 1 Input: double d = 1.2345 Expected output: 01.234

  // Example 2 Input: double d = 11.2345 Expected output: 11.234

In C#, I can use:

double.ToString("00.###")

In Java:

String.format("%.3f", 1.2345) ->  1.234 -> No leading zero.

Answer 1

Try DecimalFormat.

DecimalFormat df = new DecimalFormat("00.###");
String formatted = df.format(1.2345); 
System.out.println( formatted );

Result:

01.234