java - Formatting numbers with same amount of padding

Question

I want to format 3 digit floats in Java so they line up vertically such that they look like:

123.45
 99
 23.2
 45

When I use DecimalFormat class, I get close, but I want to insert spaces when the item has 1 or 2 digits.

My code:

DecimalFormat formatter = new java.text.DecimalFormat("####.##");
float [] floats = [123.45, 99.0, 23.2, 45.0];

for(int i=0; i<floats.length; i++)
{
    float value = floats[i];

    println(formatter.format(value));
}

It produces:

123.45
99
23.2
45

How can I print it so that all but the first line is shifted over by 1 space?

Answer 1

Try with String.format() (JavaDoc):

public static void main(String args[]){
  String format = "%10.2f
";  // width == 10 and 2 digits after the dot
  float [] floats = {123.45f, 99.0f, 23.2f, 45.0f};
  for(int i=0; i<floats.length; i++) {
      float value = floats[i];
      System.out.format(format, value);
}

and the output is :

123.45
 99.00
 23.20
 45.00