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stringbuffer left justify

Posted on 2012-09-19
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Last Modified: 2012-09-19
I am creating a file with mostly static text,
but i had a problem when i want to preserve space.

I wrote the below code for creating file..

StringBuffer bufferText = new StringBuffer();
bufferText .append(String.format("%2s", "AB" ));
bufferText .append(String.format("%4s", "2012"));
bufferText .append(String.format("%1s", " "));
bufferText .append(String.format("%2s", "CD" ));
bufferText .append(String.format("%20s", "Hi Experts"));
bufferText .append(String.format("%2s", "EF" ));

The file was created with the below text

AB2012 CD          HI ExpertsEF

but i want the output to be left justified...like below...

AB2012 CDHI Experts          EF

I mean in the below line of code the string length is 20 but the string "HI Experts" is just 10 so the remaining 10 characters are spaces... i want those ten characters to be after "HI Experts" not before "HI Experts"

bufferText .append(String.format("%20s", "Hi Experts"));

I see that stringbuffer by default appends the string with right justification can i change it to left justification....


is there a way to achieve this... other than me specifying
bufferText .append(String.format("%20s", "HI Experts          "));
i dont want to do it in the above method because sometimes the string length can be 200 and my actual string can be only 20 characters... so i dont want to count 180 spaces...
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Question by:shragi
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Accepted Solution

by:
CEHJ earned 2000 total points
ID: 38414982
Try
bufferText .append(String.format("%-20s", "Hi Experts"));

Open in new window

Use StringBuilder btw, unless you've a good reason not to
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Author Comment

by:shragi
ID: 38415014
that solved my problem.... i ahve another question...how to add only spaces... using append...

i mean if i want to add some 20 spaces i am using the below line
bufferText .append(String.format("%-20s", "                    "));

is there any other way to do this...
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LVL 86

Expert Comment

by:CEHJ
ID: 38415046
You don't need to add spaces - that's the whole point of formatting. An empty String will suffice
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Author Comment

by:shragi
ID: 38415103
excellent thank you :)
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LVL 86

Expert Comment

by:CEHJ
ID: 38415362
:)
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