Regarding String builder....

Question

StringBuilder str= new StringBuilder(emptySpaces(1150));
str.replace(1,8, "25632365");
str.replace(9,11, "758");
str.replace(12,14, "235");
str.replace(15,39, "TS610IT AADX 0502744129");
str.replace(40,42,"C13");
str.replace(43,45,"MIB");
str.replace(46,46, "D");
What is wrong with above code?
After each replace statement. if i check the length of the it is increased by 1, when i created string builder the length was defined as 1150, after 1st replace it becomes 1151, after 2nd replace it becomes 1152 and so on ....
Please let me know the error in the code. (My purpose is to define a fixed length string and replace the characters at particular position, the length of the staring should never change)

Answer 1

user8378448 wrote:
What is wrong with above code?In addition to what doremi said, I have two other observations:
1. I suspect you need to be reminded that characters in a StringBuilder are indexed from 0, not 1.
2. You appear to be filling in all the empty space (difficult to tell because of your previous mistake).
If so, why not just use:StringBuilder str = new StringBuilder(1150);
str.append("25632365");
str.append("758");
...rather than 'replace'? You can always pad out any unused characters at the end.
If it's not the case, then replace may still be the way to go.
Winston