There is a class
I think you are talking about padding strings with spaces.
One way to do this is with string format codes.
For example, if you want to pad a string to a certain length with spaces, use something like this:
String padded = String.format("%-20s", str);
In a formatter,
% introduces a format sequence. The
- means that the string will be left-justified (spaces will be added on the right of the string). The
20 means the resulting string will be 20 characters long. The
s is the character string format code, and ends the format sequence.