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Basically this expression (%-" + i + "s","#") means:
Apply this format (%-" + i + "s") to the parametrized String #.
%: means a formatting expression will follow.
-: means you want to padd to the rigth.( + or none means that you want to padd to the left).
i: means the length of the string that you expect. The length of the missing characters will filled with blank spaces.
s: denotes the type of the object, in this case strings.
For each iteration I get:
'#' where i=1. No padding is added because you expect a string of length 1.
'# ' where i=2.
'# ' where i=3.
.... until '# ' where i = 6.
For each iteration I replace blank spaces with # (.replace(' ','#');). So finally I get:
'#'
'##'
'###'
'####'
'#####'
'######'
For each iteration also I apply a final formatting:
String.format("%" + (n) + "s",padded).
Basically I am saying I expect in every iteration a string with a length of 6 characteres and every missing position will filled with blank spaces to the left. So I get:
' #'
' ##'
' ###'
' ####'
' #####'
'######'
And that's all.
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Staircase
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Sure.
Basically this expression (%-" + i + "s","#") means:
For each iteration I get:
For each iteration I replace blank spaces with # (.replace(' ','#');). So finally I get:
For each iteration also I apply a final formatting:
Basically I am saying I expect in every iteration a string with a length of 6 characteres and every missing position will filled with blank spaces to the left. So I get:
And that's all.